Shared Pool Statistics - awr report -m 10.2.0.1
Hi,
I'm new to reading awr report and performance tuning.
I have the below in my statspack.
Do i need to increase my shared pool?
Any one can advise and explain "% Memory for SQL w/exec" and "% SQL with executions>1"
Shared Pool Statistics
Begin End
Memory Usage %: 95.78 97.71
% SQL with executions>1: 51.51 80.85
% Memory for SQL w/exec> 1: 67.88 82.46
thanks!
user21123 wrote:
The sweet point for the shared pool Memory Usage % is at about ~70%-80% because of aging out. You are at ~90%. It would be advisable to increase the shared pool, but if you're using 10g SGA_TARGET and SGA_MAX_SIZE, then that might require increasing those parameters. It depends how your AWR report looks for the Buffer Cache.
What makes you think this ?
In an OLTP system you hope for 100% shareable SQL, and correct allocation for the other objects, which would lead to 100% usage. In realistic terms, you're likely to get a few percent (which is often the shared_pool_reserved) free because there's a constant turn-over of non-shareable SQL.
If you're always seeing 70% - 80%, then there are several scenraios that might explain the figure. One is that you've simply made shared pool a bit too big. At the opposite extreme you might be constantly flushing 20%-30% of the material from the shared pool because it has become so fragmented that you have to clear a lot of garbage to create a small amount of contiguous space.
The best guideline to follow is to check whether you appear to be losing a significant amount of time on libarary cache and shared pool latches, using up an undesirable amount of CPU on parse time, see lots of reloads (without corresponding invalidations) in v$librarycache.
Without further information, we really can't say how good or bad the situation is. In fact, it's possible that the information that +"50% of your SQL has been shared, 50% has been single use"+ is a possible indicator that the shared_pool_size is too small, and we are filling the excess space with garbage rather than keeping the garbage (and library cache search time) to a minimum.
I would be interested to hear the thinking behind your suggestion, though.
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
http://www.jlcomp.demon.co.uk
"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge." Stephen Hawking.
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How to set the correct shared pool size and db_buffer_cache using awr
Hi All,
I want to how to set the correct size for shared_pool_size and db_cache_size using shared pool advisory and buffer pool advisory of awr report. I have paste the shared and buffer pool advisory of awr report.
Shared Pool Advisory
* SP: Shared Pool Est LC: Estimated Library Cache Factr: Factor
* Note there is often a 1:Many correlation between a single logical object in the Library Cache, and the physical number of memory objects associated with it. Therefore comparing the number of Lib Cache objects (e.g. in v$librarycache), with the number of Lib Cache Memory Objects is invalid.
Shared Pool Size(M) SP Size Factr Est LC Size (M) Est LC Mem Obj Est LC Time Saved (s) Est LC Time Saved Factr Est LC Load Time (s) Est LC Load Time Factr Est LC Mem Obj Hits (K)
4,096 1.00 471 25,153 184,206 1.00 149 1.00 9,069
4,736 1.16 511 27,328 184,206 1.00 149 1.00 9,766
5,248 1.28 511 27,346 184,206 1.00 149 1.00 9,766
5,760 1.41 511 27,346 184,206 1.00 149 1.00 9,766
6,272 1.53 511 27,346 184,206 1.00 149 1.00 9,766
6,784 1.66 511 27,346 184,206 1.00 149 1.00 9,766
7,296 1.78 511 27,346 184,206 1.00 149 1.00 9,766
7,808 1.91 511 27,346 184,206 1.00 149 1.00 9,766
8,320 2.03 511 27,346 184,206 1.00 149 1.00 9,766
Buffer Pool Advisory
* Only rows with estimated physical reads >0 are displayed
* ordered by Block Size, Buffers For Estimate
P Size for Est (M) Size Factor Buffers (thousands) Est Phys Read Factor Estimated Phys Reads (thousands) Est Phys Read Time Est %DBtime for Rds
D 4,096 0.10 485 1.02 1,002 1 0.00
D 8,192 0.20 970 1.00 987 1 0.00
D 12,288 0.30 1,454 1.00 987 1 0.00
D 16,384 0.40 1,939 1.00 987 1 0.00
D 20,480 0.50 2,424 1.00 987 1 0.00
D 24,576 0.60 2,909 1.00 987 1 0.00
D 28,672 0.70 3,394 1.00 987 1 0.00
D 32,768 0.80 3,878 1.00 987 1 0.00
D 36,864 0.90 4,363 1.00 987 1 0.00
D 40,960 1.00 4,848 1.00 987 1 0.00
D 45,056 1.10 5,333 1.00 987 1 0.00
D 49,152 1.20 5,818 1.00 987 1 0.00
D 53,248 1.30 6,302 1.00 987 1 0.00
D 57,344 1.40 6,787 1.00 987 1 0.00
D 61,440 1.50 7,272 1.00 987 1 0.00
D 65,536 1.60 7,757 1.00 987 1 0.00
D 69,632 1.70 8,242 1.00 987 1 0.00
D 73,728 1.80 8,726 1.00 987 1 0.00
D 77,824 1.90 9,211 1.00 987 1 0.00
D 81,920 2.00 9,696 1.00 987 1 0.00
My shared pool size is 4gb and db_cache_size is 40Gb.
Please help me in configuring the correct size for this.
Thanks and Regards,Hi ,
Actually batch load is taking too much time.
Please find below the 1 hr awr report
Snap Id Snap Time Sessions Cursors/Session
Begin Snap: 6557 27-Nov-11 16:00:06 126 1.3
End Snap: 6558 27-Nov-11 17:00:17 130 1.6
Elapsed: 60.17 (mins)
DB Time: 34.00 (mins)
Report Summary
Cache Sizes
Begin End
Buffer Cache: 40,960M 40,960M Std Block Size: 8K
Shared Pool Size: 4,096M 4,096M Log Buffer: 25,908K
Load Profile
Per Second Per Transaction Per Exec Per Call
DB Time(s): 0.6 1.4 0.00 0.07
DB CPU(s): 0.5 1.2 0.00 0.06
Redo size: 281,296.9 698,483.4
Logical reads: 20,545.6 51,016.4
Block changes: 1,879.5 4,667.0
Physical reads: 123.7 307.2
Physical writes: 66.4 164.8
User calls: 8.2 20.4
Parses: 309.4 768.4
Hard parses: 8.5 21.2
W/A MB processed: 1.7 4.3
Logons: 0.7 1.6
Executes: 1,235.9 3,068.7
Rollbacks: 0.0 0.0
Transactions: 0.4
Instance Efficiency Percentages (Target 100%)
Buffer Nowait %: 100.00 Redo NoWait %: 100.00
Buffer Hit %: 99.66 In-memory Sort %: 100.00
Library Hit %: 99.19 Soft Parse %: 97.25
Execute to Parse %: 74.96 Latch Hit %: 99.97
Parse CPU to Parse Elapsd %: 92.41 % Non-Parse CPU: 98.65
Shared Pool Statistics
Begin End
Memory Usage %: 80.33 82.01
% SQL with executions>1: 90.90 86.48
% Memory for SQL w/exec>1: 90.10 86.89
Top 5 Timed Foreground Events
Event Waits Time(s) Avg wait (ms) % DB time Wait Class
DB CPU 1,789 87.72
db file sequential read 27,531 50 2 2.45 User I/O
db file scattered read 26,322 30 1 1.47 User I/O
row cache lock 1,798 20 11 0.96 Concurrency
OJVM: Generic 36 15 421 0.74 Other
Host CPU (CPUs: 24 Cores: 12 Sockets: )
Load Average Begin Load Average End %User %System %WIO %Idle
0.58 1.50 2.8 0.7 0.1 96.6
Instance CPU
%Total CPU %Busy CPU %DB time waiting for CPU (Resource Manager)
2.2 63.6 0.0
Memory Statistics
Begin End
Host Mem (MB): 131,072.0 131,072.0
SGA use (MB): 50,971.4 50,971.4
PGA use (MB): 545.5 1,066.3
% Host Mem used for SGA+PGA: 39.30 39.70
RAC Statistics
Begin End
Number of Instances: 2 2
Global Cache Load Profile
Per Second Per Transaction
Global Cache blocks received: 3.09 7.68
Global Cache blocks served: 1.86 4.62
GCS/GES messages received: 78.64 195.27
GCS/GES messages sent: 53.82 133.65
DBWR Fusion writes: 0.52 1.30
Estd Interconnect traffic (KB) 65.50
Global Cache Efficiency Percentages (Target local+remote 100%)
Buffer access - local cache %: 99.65
Buffer access - remote cache %: 0.02
Buffer access - disk %: 0.34
Global Cache and Enqueue Services - Workload Characteristics
Avg global enqueue get time (ms): 0.0
Avg global cache cr block receive time (ms): 1.7
Avg global cache current block receive time (ms): 1.0
Avg global cache cr block build time (ms): 0.0
Avg global cache cr block send time (ms): 0.0
Global cache log flushes for cr blocks served %: 1.4
Avg global cache cr block flush time (ms): 0.9
Avg global cache current block pin time (ms): 0.0
Avg global cache current block send time (ms): 0.0
Global cache log flushes for current blocks served %: 0.1
Avg global cache current block flush time (ms): 0.0
Global Cache and Enqueue Services - Messaging Statistics
Avg message sent queue time (ms): 0.0
Avg message sent queue time on ksxp (ms): 0.4
Avg message received queue time (ms): 0.5
Avg GCS message process time (ms): 0.0
Avg GES message process time (ms): 0.0
% of direct sent messages: 79.13
% of indirect sent messages: 17.10
% of flow controlled messages: 3.77
Cluster Interconnect
Begin End
Interface IP Address Pub Source IP Pub Src
en9 10.51.10.61 N Oracle Cluster Repository
Main Report
* Report Summary
* Wait Events Statistics
* SQL Statistics
* Instance Activity Statistics
* IO Stats
* Buffer Pool Statistics
* Advisory Statistics
* Wait Statistics
* Undo Statistics
* Latch Statistics
* Segment Statistics
* Dictionary Cache Statistics
* Library Cache Statistics
* Memory Statistics
* Streams Statistics
* Resource Limit Statistics
* Shared Server Statistics
* init.ora Parameters
More RAC Statistics
* RAC Report Summary
* Global Messaging Statistics
* Global CR Served Stats
* Global CURRENT Served Stats
* Global Cache Transfer Stats
* Interconnect Stats
* Dynamic Remastering Statistics
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Statistic Name Time (s) % of DB Time
sql execute elapsed time 1,925.20 94.38
DB CPU 1,789.38 87.72
connection management call elapsed time 99.65 4.89
PL/SQL execution elapsed time 89.81 4.40
parse time elapsed 46.32 2.27
hard parse elapsed time 25.01 1.23
Java execution elapsed time 21.24 1.04
PL/SQL compilation elapsed time 11.92 0.58
failed parse elapsed time 9.37 0.46
hard parse (sharing criteria) elapsed time 8.71 0.43
sequence load elapsed time 0.06 0.00
repeated bind elapsed time 0.02 0.00
hard parse (bind mismatch) elapsed time 0.01 0.00
DB time 2,039.77
background elapsed time 122.00
background cpu time 113.42
Statistic Value End Value
NUM_LCPUS 0
NUM_VCPUS 0
AVG_BUSY_TIME 12,339
AVG_IDLE_TIME 348,838
AVG_IOWAIT_TIME 221
AVG_SYS_TIME 2,274
AVG_USER_TIME 9,944
BUSY_TIME 299,090
IDLE_TIME 8,375,051
IOWAIT_TIME 6,820
SYS_TIME 57,512
USER_TIME 241,578
LOAD 1 2
OS_CPU_WAIT_TIME 312,200
PHYSICAL_MEMORY_BYTES 137,438,953,472
NUM_CPUS 24
NUM_CPU_CORES 12
GLOBAL_RECEIVE_SIZE_MAX 1,310,720
GLOBAL_SEND_SIZE_MAX 1,310,720
TCP_RECEIVE_SIZE_DEFAULT 16,384
TCP_RECEIVE_SIZE_MAX 9,223,372,036,854,775,807
TCP_RECEIVE_SIZE_MIN 4,096
TCP_SEND_SIZE_DEFAULT 16,384
TCP_SEND_SIZE_MAX 9,223,372,036,854,775,807
TCP_SEND_SIZE_MIN 4,096
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Operating System Statistics - Detail
Snap Time Load %busy %user %sys %idle %iowait
27-Nov 16:00:06 0.58
27-Nov 17:00:17 1.50 3.45 2.79 0.66 96.55 0.08
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Foreground Wait Class
* s - second, ms - millisecond - 1000th of a second
* ordered by wait time desc, waits desc
* %Timeouts: value of 0 indicates value was < .5%. Value of null is truly 0
* Captured Time accounts for 95.7% of Total DB time 2,039.77 (s)
* Total FG Wait Time: 163.14 (s) DB CPU time: 1,789.38 (s)
Wait Class Waits %Time -outs Total Wait Time (s) Avg wait (ms) %DB time
DB CPU 1,789 87.72
User I/O 61,229 0 92 1 4.49
Other 102,743 40 31 0 1.50
Concurrency 3,169 10 24 7 1.16
Cluster 58,920 0 11 0 0.52
System I/O 45,407 0 6 0 0.29
Configuration 107 7 1 5 0.03
Commit 383 0 0 1 0.01
Network 15,275 0 0 0 0.00
Application 52 8 0 0 0.00
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Foreground Wait Events
* s - second, ms - millisecond - 1000th of a second
* Only events with Total Wait Time (s) >= .001 are shown
* ordered by wait time desc, waits desc (idle events last)
* %Timeouts: value of 0 indicates value was < .5%. Value of null is truly 0
Event Waits %Time -outs Total Wait Time (s) Avg wait (ms) Waits /txn % DB time
db file sequential read 27,531 0 50 2 18.93 2.45
db file scattered read 26,322 0 30 1 18.10 1.47
row cache lock 1,798 0 20 11 1.24 0.96
OJVM: Generic 36 42 15 421 0.02 0.74
db file parallel read 394 0 7 19 0.27 0.36
control file sequential read 22,248 0 6 0 15.30 0.28
reliable message 4,439 0 4 1 3.05 0.18
gc current grant busy 7,597 0 3 0 5.22 0.16
PX Deq: Slave Session Stats 2,661 0 3 1 1.83 0.16
DFS lock handle 3,208 0 3 1 2.21 0.16
direct path write temp 4,842 0 3 1 3.33 0.15
library cache load lock 39 0 3 72 0.03 0.14
gc cr multi block request 37,008 0 3 0 25.45 0.14
IPC send completion sync 5,451 0 2 0 3.75 0.10
gc cr block 2-way 4,669 0 2 0 3.21 0.09
enq: PS - contention 3,183 33 1 0 2.19 0.06
gc cr grant 2-way 5,151 0 1 0 3.54 0.06
direct path read temp 1,722 0 1 1 1.18 0.05
gc current block 2-way 1,807 0 1 0 1.24 0.03
os thread startup 6 0 1 108 0.00 0.03
name-service call wait 12 0 1 47 0.01 0.03
PX Deq: Signal ACK RSG 2,046 50 0 0 1.41 0.02
log file switch completion 3 0 0 149 0.00 0.02
rdbms ipc reply 3,610 0 0 0 2.48 0.02
gc current grant 2-way 1,432 0 0 0 0.98 0.02
library cache pin 903 32 0 0 0.62 0.02
PX Deq: reap credit 35,815 100 0 0 24.63 0.01
log file sync 383 0 0 1 0.26 0.01
Disk file operations I/O 405 0 0 0 0.28 0.01
library cache lock 418 3 0 0 0.29 0.01
kfk: async disk IO 23,159 0 0 0 15.93 0.01
gc current block busy 4 0 0 35 0.00 0.01
gc current multi block request 1,206 0 0 0 0.83 0.01
ges message buffer allocation 38,526 0 0 0 26.50 0.00
enq: FB - contention 131 0 0 0 0.09 0.00
undo segment extension 8 100 0 6 0.01 0.00
CSS initialization 8 0 0 6 0.01 0.00
SQL*Net message to client 14,600 0 0 0 10.04 0.00
enq: HW - contention 96 0 0 0 0.07 0.00
CSS operation: action 8 0 0 4 0.01 0.00
gc cr block busy 33 0 0 1 0.02 0.00
latch free 30 0 0 1 0.02 0.00
enq: TM - contention 49 6 0 0 0.03 0.00
enq: JQ - contention 19 100 0 1 0.01 0.00
SQL*Net more data to client 666 0 0 0 0.46 0.00
asynch descriptor resize 3,179 100 0 0 2.19 0.00
latch: shared pool 3 0 0 3 0.00 0.00
CSS operation: query 24 0 0 0 0.02 0.00
PX Deq: Signal ACK EXT 72 0 0 0 0.05 0.00
KJC: Wait for msg sends to complete 269 0 0 0 0.19 0.00
latch: object queue header operation 4 0 0 1 0.00 0.00
gc cr block congested 5 0 0 0 0.00 0.00
utl_file I/O 11 0 0 0 0.01 0.00
enq: TO - contention 3 33 0 0 0.00 0.00
SQL*Net message from client 14,600 0 219,478 15033 10.04
jobq slave wait 7,726 100 3,856 499 5.31
PX Deq: Execution Msg 10,556 19 50 5 7.26
PX Deq: Execute Reply 2,946 31 27 9 2.03
PX Deq: Parse Reply 3,157 35 3 1 2.17
PX Deq: Join ACK 2,976 28 2 1 2.05
PX Deq Credit: send blkd 7 14 0 4 0.00
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Background Wait Events
* ordered by wait time desc, waits desc (idle events last)
* Only events with Total Wait Time (s) >= .001 are shown
* %Timeouts: value of 0 indicates value was < .5%. Value of null is truly 0
Event Waits %Time -outs Total Wait Time (s) Avg wait (ms) Waits /txn % bg time
os thread startup 140 0 13 90 0.10 10.35
db file parallel write 8,233 0 6 1 5.66 5.08
log file parallel write 3,906 0 6 1 2.69 4.62
log file sequential read 350 0 5 16 0.24 4.49
control file sequential read 13,737 0 5 0 9.45 3.72
DFS lock handle 2,990 27 2 1 2.06 1.43
db file sequential read 921 0 2 2 0.63 1.39
SQL*Net break/reset to client 18 0 1 81 0.01 1.19
control file parallel write 2,455 0 1 1 1.69 1.12
ges lms sync during dynamic remastering and reconfig 24 100 1 50 0.02 0.98
library cache load lock 35 0 1 24 0.02 0.68
ASM file metadata operation 3,483 0 1 0 2.40 0.65
enq: CO - master slave det 1,203 100 1 0 0.83 0.46
kjbdrmcvtq lmon drm quiesce: ping completion 9 0 1 62 0.01 0.46
enq: WF - contention 11 0 0 35 0.01 0.31
CGS wait for IPC msg 32,702 100 0 0 22.49 0.19
gc object scan 28,788 100 0 0 19.80 0.15
row cache lock 535 0 0 0 0.37 0.14
library cache pin 370 55 0 0 0.25 0.12
ksxr poll remote instances 19,119 100 0 0 13.15 0.11
name-service call wait 6 0 0 19 0.00 0.10
gc current block 2-way 304 0 0 0 0.21 0.09
gc cr block 2-way 267 0 0 0 0.18 0.08
gc cr grant 2-way 355 0 0 0 0.24 0.08
ges LMON to get to FTDONE 3 100 0 24 0.00 0.06
enq: CF - contention 145 76 0 0 0.10 0.05
PX Deq: reap credit 8,842 100 0 0 6.08 0.05
reliable message 126 0 0 0 0.09 0.05
db file scattered read 19 0 0 3 0.01 0.05
library cache lock 162 1 0 0 0.11 0.04
latch: shared pool 2 0 0 27 0.00 0.04
Disk file operations I/O 504 0 0 0 0.35 0.04
gc current grant busy 148 0 0 0 0.10 0.04
gcs log flush sync 84 0 0 1 0.06 0.04
ges message buffer allocation 24,934 0 0 0 17.15 0.02
enq: CR - block range reuse ckpt 83 0 0 0 0.06 0.02
latch free 22 0 0 1 0.02 0.02
CSS operation: action 13 0 0 2 0.01 0.02
CSS initialization 4 0 0 6 0.00 0.02
direct path read 1 0 0 21 0.00 0.02
rdbms ipc reply 153 0 0 0 0.11 0.01
db file parallel read 2 0 0 8 0.00 0.01
direct path write 5 0 0 3 0.00 0.01
gc current multi block request 49 0 0 0 0.03 0.01
gc current block busy 5 0 0 2 0.00 0.01
enq: PS - contention 24 50 0 0 0.02 0.01
gc cr multi block request 54 0 0 0 0.04 0.01
ges generic event 1 100 0 10 0.00 0.01
gc current grant 2-way 35 0 0 0 0.02 0.01
kfk: async disk IO 183 0 0 0 0.13 0.01
Log archive I/O 3 0 0 2 0.00 0.01
gc buffer busy acquire 2 0 0 3 0.00 0.00
LGWR wait for redo copy 123 0 0 0 0.08 0.00
IPC send completion sync 18 0 0 0 0.01 0.00
enq: TA - contention 11 0 0 0 0.01 0.00
read by other session 2 0 0 2 0.00 0.00
enq: TM - contention 9 89 0 0 0.01 0.00
latch: ges resource hash list 135 0 0 0 0.09 0.00
PX Deq: Slave Session Stats 12 0 0 0 0.01 0.00
KJC: Wait for msg sends to complete 89 0 0 0 0.06 0.00
enq: TD - KTF dump entries 8 0 0 0 0.01 0.00
enq: US - contention 7 0 0 0 0.00 0.00
CSS operation: query 12 0 0 0 0.01 0.00
enq: TK - Auto Task Serialization 6 100 0 0 0.00 0.00
PX Deq: Signal ACK RSG 24 50 0 0 0.02 0.00
log file single write 6 0 0 0 0.00 0.00
enq: WL - contention 2 100 0 1 0.00 0.00
ADR block file read 13 0 0 0 0.01 0.00
ADR block file write 5 0 0 0 0.00 0.00
latch: object queue header operation 1 0 0 1 0.00 0.00
gc cr block busy 1 0 0 1 0.00 0.00
rdbms ipc message 103,276 67 126,259 1223 71.03
PX Idle Wait 6,467 67 12,719 1967 4.45
wait for unread message on broadcast channel 7,240 100 7,221 997 4.98
gcs remote message 218,809 84 7,213 33 150.49
DIAG idle wait 203,228 95 7,185 35 139.77
shared server idle wait 121 100 3,630 30000 0.08
ASM background timer 3,343 0 3,611 1080 2.30
Space Manager: slave idle wait 723 100 3,610 4993 0.50
heartbeat monitor sleep 722 100 3,610 5000 0.50
ges remote message 73,089 52 3,609 49 50.27
dispatcher timer 66 88 3,608 54660 0.05
pmon timer 1,474 82 3,607 2447 1.01
PING 1,487 19 3,607 2426 1.02
Streams AQ: qmn slave idle wait 125 0 3,594 28754 0.09
Streams AQ: qmn coordinator idle wait 250 50 3,594 14377 0.17
smon timer 18 50 3,505 194740 0.01
JOX Jit Process Sleep 73 100 976 13370 0.05
class slave wait 56 0 605 10806 0.04
KSV master wait 2,215 98 1 0 1.52
SQL*Net message from client 109 0 0 2 0.07
PX Deq: Parse Reply 27 44 0 1 0.02
PX Deq: Join ACK 30 40 0 1 0.02
PX Deq: Execute Reply 20 30 0 0 0.01
Streams AQ: RAC qmn coordinator idle wait 259 100 0 0 0.18
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Wait Event Histogram
* Units for Total Waits column: K is 1000, M is 1000000, G is 1000000000
* % of Waits: value of .0 indicates value was <.05%; value of null is truly 0
* % of Waits: column heading of <=1s is truly <1024ms, >1s is truly >=1024ms
* Ordered by Event (idle events last)
% of Waits
Event Total Waits <1ms <2ms <4ms <8ms <16ms <32ms <=1s >1s
ADR block file read 13 100.0
ADR block file write 5 100.0
ADR file lock 6 100.0
ARCH wait for archivelog lock 3 100.0
ASM file metadata operation 3483 99.6 .1 .1 .2
CGS wait for IPC msg 32.7K 100.0
CSS initialization 12 50.0 50.0
CSS operation: action 21 28.6 9.5 61.9
CSS operation: query 36 86.1 5.6 8.3
DFS lock handle 6198 98.6 1.2 .1 .1
Disk file operations I/O 909 95.7 3.6 .7
IPC send completion sync 5469 99.9 .1 .0 .0
KJC: Wait for msg sends to complete 313 100.0
LGWR wait for redo copy 122 100.0
Log archive I/O 3 66.7 33.3
OJVM: Generic 36 55.6 44.4
PX Deq: Signal ACK EXT 72 98.6 1.4
PX Deq: Signal ACK RSG 2070 99.7 .0 .1 .0 .1
PX Deq: Slave Session Stats 2673 99.7 .2 .1 .0
PX Deq: reap credit 44.7K 100.0
SQL*Net break/reset to client 20 95.0 5.0
SQL*Net message to client 14.7K 100.0
SQL*Net more data from client 32 100.0
SQL*Net more data to client 689 100.0
asynch descriptor resize 3387 100.0
buffer busy waits 2 100.0
control file parallel write 2455 96.6 2.2 .6 .6 .1
control file sequential read 36K 99.4 .3 .1 .1 .1 .1 .0
db file parallel read 397 8.8 .8 5.5 12.6 17.4 46.3 8.6
db file parallel write 8233 85.4 10.3 2.3 1.4 .4 .1
db file scattered read 26.3K 79.2 1.5 8.2 10.5 .6 .1 .0
db file sequential read 28.4K 60.2 3.3 18.0 18.1 .3 .1 .0
db file single write 2 100.0
direct path read 2 50.0 50.0
direct path read temp 1722 95.8 2.8 .1 .5 .8 .1
direct path write 6 83.3 16.7
direct path write temp 4842 96.3 2.7 .5 .2 .0 .0 .2
enq: AF - task serialization 1 100.0
enq: CF - contention 145 99.3 .7
enq: CO - master slave det 1203 98.9 .8 .2
enq: CR - block range reuse ckpt 83 100.0
enq: DR - contention 2 100.0
enq: FB - contention 131 100.0
enq: HW - contention 97 100.0
enq: JQ - contention 19 89.5 10.5
enq: JS - job run lock - synchronize 3 100.0
enq: MD - contention 1 100.0
enq: MW - contention 2 100.0
enq: PS - contention 3207 99.5 .4 .1
enq: TA - contention 11 100.0
enq: TD - KTF dump entries 8 100.0
enq: TK - Auto Task Serialization 6 100.0
enq: TM - contention 58 100.0
enq: TO - contention 3 100.0
enq: TQ - DDL contention 1 100.0
enq: TS - contention 1 100.0
enq: UL - contention 1 100.0
enq: US - contention 7 100.0
enq: WF - contention 11 81.8 18.2
enq: WL - contention 2 50.0 50.0
gc buffer busy acquire 2 50.0 50.0
gc cr block 2-way 4934 99.9 .1 .0 .0
gc cr block busy 35 68.6 31.4
gc cr block congested 6 100.0
gc cr disk read 2 100.0
gc cr grant 2-way 4824 100.0 .0
gc cr grant congested 2 100.0
gc cr multi block request 37.1K 99.8 .2 .0 .0 .0 .0 .0
gc current block 2-way 2134 99.9 .0 .0
gc current block busy 7 14.3 14.3 14.3 28.6 28.6
gc current block congested 2 100.0
gc current grant 2-way 1337 99.9 .1
gc current grant busy 7123 99.2 .2 .2 .0 .0 .3 .1
gc current grant congested 2 100.0
gc current multi block request 1260 99.8 .2
gc object scan 28.8K 100.0
gcs log flush sync 65 95.4 3.1 1.5
ges LMON to get to FTDONE 3 100.0
ges generic event 1 100.0
ges inquiry response 2 100.0
ges lms sync during dynamic remastering and reconfig 24 16.7 29.2 54.2
ges message buffer allocation 63.1K 100.0
kfk: async disk IO 23.3K 100.0 .0 .0
kjbdrmcvtq lmon drm quiesce: ping completion 9 11.1 88.9
ksxr poll remote instances 19.1K 100.0
latch free 52 59.6 40.4
latch: call allocation 2 100.0
latch: gc element 1 100.0
latch: gcs resource hash 1 100.0
latch: ges resource hash list 135 100.0
latch: object queue header operation 5 40.0 40.0 20.0
latch: shared pool 5 40.0 20.0 20.0 20.0
library cache load lock 74 9.5 5.4 8.1 17.6 10.8 13.5 35.1
library cache lock 493 99.2 .4 .4
library cache pin 1186 98.4 .3 1.2 .1
library cache: mutex X 6 100.0
log file parallel write 3897 72.9 1.5 17.1 7.5 .6 .3 .1
log file sequential read 350 4.6 3.1 59.4 30.0 2.9
log file single write 6 100.0
log file switch completion 3 33.3 66.7
log file sync 385 90.4 3.6 4.7 .8 .5
name-service call wait 18 5.6 5.6 5.6 16.7 44.4 22.2
os thread startup 146 100.0
rdbms ipc reply 3763 99.7 .3
read by other session 2 50.0 50.0
reliable message 4565 99.7 .2 .0 .0 .1
row cache lock 2334 99.3 .2 .1 .1 .3
undo segment extension 8 50.0 37.5 12.5
utl_file I/O 11 100.0
ASM background timer 3343 57.0 .3 .1 .1 .1 21.1 21.4
DIAG idle wait 203.2K 3.4 .2 .4 18.0 41.4 14.8 21.8
JOX Jit Process Sleep 73 2.7 97.3
KSV master wait 2213 99.4 .1 .2 .3
PING 1487 81.0 19.0
PX Deq Credit: send blkd 7 57.1 14.3 14.3 14.3
PX Deq: Execute Reply 2966 59.8 .8 9.5 5.6 10.2 2.6 11.4
PX Deq: Execution Msg 10.6K 72.4 12.1 2.6 2.5 .1 5.6 4.6 .0
PX Deq: Join ACK 3006 77.9 22.1 .1
PX Deq: Parse Reply 3184 67.1 31.1 1.6 .2
PX Idle Wait 6466 .2 8.7 4.3 4.8 .3 .1 5.0 76.6
SQL*Net message from client 14.7K 72.4 2.8 .8 .5 .9 .4 2.8 19.3
Space Manager: slave idle wait 722 100.0
Streams AQ: RAC qmn coordinator idle wait 259 100.0
Streams AQ: qmn coordinator idle wait 250 50.0 50.0
Streams AQ: qmn slave idle wait 125 100.0
class slave wait 55 67.3 7.3 1.8 5.5 1.8 7.3 9.1
dispatcher timer 66 6.1 93.9
gcs remote message 218.6K 7.7 1.8 1.2 1.6 1.7 15.7 70.3
ges remote message 72.9K 29.7 5.1 2.7 2.2 1.5 4.0 54.7
heartbeat monitor sleep 722 100.0
jobq slave wait 7725 .1 .0 99.9
pmon timer 1474 18.4 81.6
rdbms ipc message 103.3K 20.7 2.7 1.5 1.3 .9 .7 40.7 31.6
shared server idle wait 121 100.0
smon timer 18 100.0
wait for unread message on broadcast channel 7238 .3 99.7
Back to Wait Events Statistics
Back to Top
Wait Event Histogram Detail (64 msec to 2 sec)
* Units for Total Waits column: K is 1000, M is 1000000, G is 1000000000
* Units for % of Total Waits: ms is milliseconds s is 1024 milliseconds (approximately 1 second)
* % of Total Waits: total waits for all wait classes, including Idle
* % of Total Waits: value of .0 indicates value was <.05%; value of null is truly 0
* Ordered by Event (only non-idle events are displayed)
% of Total Waits
Event Waits 64ms to 2s <32ms <64ms <1/8s <1/4s <1/2s <1s <2s >=2s
ASM file metadata operation 6 99.8 .1 .1
DFS lock handle 6 99.9 .1 .0
OJVM: Generic 16 55.6 2.8 41.7
PX Deq: Signal ACK RSG 3 99.9 .0 .1
PX Deq: Slave Session Stats 3 99.9 .0 .0 .0
SQL*Net break/reset to client 1 95.0 5.0
control file sequential read 1 100.0 .0
db file parallel read 34 91.4 8.6
db file scattered read 4 100.0 .0 .0
db file sequential read 6 100.0 .0 .0 .0
direct path write temp 11 99.8 .1 .1 .0
enq: WF - contention 2 81.8 18.2
gc cr block 2-way 1 100.0 .0
gc cr multi block request 1 100.0 .0
gc current block 2-way 1 100.0 .0
gc current block busy 2 71.4 28.6
gc current grant busy 8 99.9 .0 .1
ges lms sync during dynamic remastering and reconfig 13 45.8 20.8 33.3
kjbdrmcvtq lmon drm quiesce: ping completion 8 11.1 11.1 77.8
latch: shared pool 1 80.0 20.0
library cache load lock 26 64.9 14.9 12.2 4.1 4.1
log file parallel write 2 99.9 .0 .0
log file sequential read 10 97.1 2.0 .6 .3
log file switch completion 2 33.3 66.7
name-service call wait 4 77.8 22.2
os thread startup 146 100.0
reliable message 4 99.9 .0 .1
row cache lock 2 99.7 .0 .0 .3
Back to Wait Events Statistics
Back to Top
Wait Event Histogram Detail (4 sec to 2 min)
* Units for Total Waits column: K is 1000, M is 1000000, G is 1000000000
* Units for % of Total Waits: s is 1024 milliseconds (approximately 1 second) m is 64*1024 milliseconds (approximately 67 seconds or 1.1 minutes)
* % of Total Waits: total waits for all wait classes, including Idle
* % of Total Waits: value of .0 indicates value was <.05%; value of null is truly 0
* Ordered by Event (only non-idle events are displayed)
% of Total Waits
Event Waits 4s to 2m <2s <4s <8s <16s <32s < 1m < 2m >=2m
row cache lock 6 99.7 .3
Back to Wait Events Statistics
Back to Top
Wait Event Histogram Detail (4 min to 1 hr)
No data exists for this section of the report.
Back to Wait Events Statistics
Back to Top
Service Statistics
* ordered by DB Time
Service Name DB Time (s) DB CPU (s) Physical Reads (K) Logical Reads (K)
ubshost 1,934 1,744 445 73,633
SYS$USERS 105 45 1 404
SYS$BACKGROUND 0 0 1 128
ubshostXDB 0 0 0 0
Back to Wait Events Statistics
Back to Top
Service Wait Class Stats
* Wait Class info for services in the Service Statistics section.
* Total Waits and Time Waited displayed for the following wait classes: User I/O, Concurrency, Administrative, Network
* Time Waited (Wt Time) in seconds
Service Name User I/O Total Wts User I/O Wt Time Concurcy Total Wts Concurcy Wt Time Admin Total Wts Admin Wt Time Network Total Wts Network Wt Time
ubshost 60232 90 2644 4 0 0 13302 0
SYS$USERS 997 2 525 19 0 0 1973 0
SYS$BACKGROUND 1456 2 1258 14 0 0 0 0
I am not able to paste the whole awr report. I have paste some of the sections of awr report.
Please help.
Thanks and Regards, -
Hi,
I have doubts in Report Summary scection in AWR report.Please anyone clear it.
1,What is W/A MB processed?
2,What is the difference between logons in load profile section and Sessions in snap info section?
Logons means connection which may one or more sessions.Is it right?
3,What is the difference between Block changes and Physcical writes in load profile section?
a,,Block changes means only datafile? or including Undo/Temp?
b,Physical writes:Number of physical writes performed.What does mean?
For Ex:
1,Emp table has 5000 rows on 50 blocks.
2,Insert into emp select * from emp;Then commit;
50 blocks changed Hence the value 50 added to Block changes.Is it right?
What about Physical writes?How the writes value calculated.Just assume 100 writes performed for this insert statment.
How is the value(100) cacluated?What basis?Is there any parameter influenced?like db_block_size .....If it's what are the parameters?
4,Execute to Parse %: Parse once execute many.
Softparse %:
Buffer Nowait %: 99.97 Redo NoWait %: 100.00
Buffer Hit %: 99.93 In-memory Sort %: 100.00
Library Hit %: 103.53 Soft Parse %: 94.67
Execute to Parse %: 100.00 Latch Hit %: 94.42
Parse CPU to Parse Elapsd %: 12.94 % Non-Parse CPU: 99.81
a,Soft Parse %: 94.67.So Remaining 5.23% is hard parse?
b,If Execute to Parse % is 70,What does mean of remaning 30%?(Same statement but differ in various reason like authentication or optimizer)Is it right?
c,How to relate Execute to Parse %: with Soft Parse %:?
d,How to relate Parse CPU to Parse Elapsd %: with % Non-Parse CPU:?
5,Shared Pool Statistics
Begin End
Memory Usage %: 26.26 25.90
% SQL with executions>1: 98.95 98.31
% Memory for SQL w/exec>1: 97.79 99.46
a,What does mean of Memory usage?26.26% memory used in allocated total SGA(if configured sga_target or memory_target).Is it right?
b,at does mean SQL with executions>1?How to/Where to realet with other parameter in AWR?
c,at does mean % Memory for SQL w/exec>1?How to/Where to realet with other parameter in AWR?
6,What does mean of Per exec, per call in load profile section for the attribute DB Time(s),DB CPU(s)?
7,What is Load average begin/end in host cpu section?How is the value calcuated?
8,What is %wio in in host cpu section?
9,What does mean %total cpu and %busy cpu in instance cpu?
10,what does mean Applied urec?
Br,
RajHi,
Thanks for your Reply..........
Now we use 11g only,Not 12c.
I read oracle 11g document already(few times).But i couldn't understand it.Hence,i posted here.
If anyone tell,it is a BIG release from headache.
Br,
Raj -
I need you help to analyze the results of the following awr report:
The following awr report is an one hour report of oracle EBS application, oracle version 10203,
on hpux with 20 cpus.
As you can see , the top wait event is on "CPU time".
I read an article by mr. lewis regarding the same issue:
http://jonathanlewis.wordpress.com/statspack-distractions/
on a machine with 20 CPUs , with one hour report , i have (3600*20)=72000 seconds to play with.
although for the one hour target we should be aiming to use less than (1*3600*20)=72,000 CPU seconds.
In my case I am using just 13,368 cpu second.
The Load averages (from hpux top command): 0.30, 0.29, 0.28 on the machine low.
Looking at "Top 5 Timed Events" shows that the last 3 wait events are not an issue.
I alreay know the reason for the db file scattered read , and fixed it.
Yet i still have a "nasty" huge plsql block (sqlid=32fwmj6fsaqm9) that run more than : 80973 sec (about 21 hour).
select last_call_et,status
from v$session
where sid= 97
LAST_CALL_ET STATUS
80973 ACTIVEThe top 3 statment that appear at top of "SQL ordered by CPU Time" are the same as
the ones on the "SQL ordered by Gets ".
Soprisely the statment that run 21 hour is not at the top of any wait event.
It just at the 8 place of the "SQL ordered by Gets ".
Cache Sizes
~~~~~~~~~~~ Begin End
Buffer Cache: 5,712M 5,712M Std Block Size: 8K
Shared Pool Size: 1,200M 1,200M Log Buffer: 20,780K
Load Profile
~~~~~~~~~~~~ Per Second Per Transaction
Redo size: 131,028.28 44,647.67
Logical reads: 46,663.75 15,900.60
Block changes: 774.58 263.94
Physical reads: 689.68 235.01
Physical writes: 45.77 15.60
User calls: 197.04 67.14
Parses: 55.44 18.89
Hard parses: 2.49 0.85
Sorts: 57.97 19.75
Logons: 0.32 0.11
Executes: 1,538.69 524.31
Transactions: 2.93
% Blocks changed per Read: 1.66 Recursive Call %: 90.83
Rollback per transaction %: 26.52 Rows per Sort: 67.02
Instance Efficiency Percentages (Target 100%)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Buffer Nowait %: 100.00 Redo NoWait %: 100.00
Buffer Hit %: 98.53 In-memory Sort %: 100.00
Library Hit %: 99.73 Soft Parse %: 95.50
Execute to Parse %: 96.40 Latch Hit %: 99.98
Parse CPU to Parse Elapsd %: 95.69 % Non-Parse CPU: 97.93
Shared Pool Statistics Begin End
Memory Usage %: 74.33 69.54
% SQL with executions>1: 78.32 78.17
% Memory for SQL w/exec>1: 83.53 82.20
Top 5 Timed Events Avg %Total
~~~~~~~~~~~~~~~~~~ wait Call
Event Waits Time (s) (ms) Time Wait Class
CPU time 13,368 77.6
db file sequential read 844,095 3,578 4 20.8 User I/O
db file scattered read 212,830 452 2 2.6 User I/O
SQL*Net more data from client 3,116 92 30 0.5 Network
log file parallel write 10,807 74 7 0.4 System I/O
Time Model Statistics
Statistic Name Time (s) % of DB Time
sql execute elapsed time 16,785.3 97.4
DB CPU 13,367.6 77.6
DB time 17,232.8 N/A
Avg
%Time Total Wait wait Waits
Wait Class Waits -outs Time (s) (ms) /txn
User I/O 1,064,101 .0 4,032 4 100.7
System I/O 38,328 .0 123 3 3.6
Network 750,423 .0 102 0 71.0
Commit 8,043 .0 59 7 0.8
perating System Statistics DB/Inst: Snaps: 13464-13465
Statistic Total
AVG_BUSY_TIME 101,026
AVG_IDLE_TIME 258,945
AVG_IOWAIT_TIME 26,203
AVG_SYS_TIME 22,092
AVG_USER_TIME 78,819
BUSY_TIME 2,022,842
IDLE_TIME 5,181,192
IOWAIT_TIME 526,327
SYS_TIME 444,162
USER_TIME 1,578,680
LOAD 0
OS_CPU_WAIT_TIME 785,867,591,900
RSRC_MGR_CPU_WAIT_TIME 0
VM_IN_BYTES 158,449,660
VM_OUT_BYTES 0
PHYSICAL_MEMORY_BYTES 51,271,172,096
NUM_CPUS 20
Avg
%Time Total Wait wait Waits
Event Waits -outs Time (s) (ms) /txn
db file sequential read 844,095 .0 3,578 4 79.9
db file scattered read 212,830 .0 452 2 20.1
Instance Activity Stats DB/Inst:
Statistic Total per Second per Trans
CPU used by this session 363,871 101.0 34.4
CPU used when call started 519,575 144.2 49.2
SQL ordered by CPU Time
CPU Elapsed CPU per % Total
Time (s) Time (s) Executions Exec (s) DB Time SQL Id
9,993 10,180 470 21.26 59.1 g0g2sj2by3p75
Module: JDBC Thin Client
BEGIN WF_EVENT.LISTEN ( p_agent_name => :1, p_wait => :2, p_correlation => :3,
p_deq_condition => null, p_message_count => :4, p_max_error_count => :5 ); END
9,981 10,159 0 N/A 59.0 86xp3qt4czvy5
Module: JDBC Thin Client
begin :v1 := AR_BUS_EVENT_SUB_PVT.AutoRcpt_Run(:v2, :v3); end;
9,791 9,806 1 9791.15 56.9 bf8wy6bhr6nak
Module: JDBC Thin Client
SELECT C.CUSTOMER_ID CUSTOMER_ID, C.CUSTOMER_SITE_USE_ID SITE_USE_ID, C.CURRENCY
RCPT_CURRENCY, CR1.AMOUNT LAST_PAYMENT_AMOUNT, CR1.RECEIPT_DATE LAST_PAYMENT_DA
TE, CR1.RECEIPT_NUMBER LAST_PAYMENT_NUMBER FROM ( SELECT A.CUSTOMER_ID, A.CUSTOM
ER_SITE_USE_ID, A.CURRENCY, MAX(B.CASH_RECEIPT_ID) CASH_RECEIPT_ID FROM ( SELECT
SQL ordered by Gets
Gets CPU Elapsed
Buffer Gets Executions per Exec %Total Time (s) Time (s) SQL Id
69,423,012 470 147,708.5 41.3 9992.60 10180.36 g0g2sj2by3p75
Module: JDBC Thin Client
BEGIN WF_EVENT.LISTEN ( p_agent_name => :1, p_wait => :2, p_correlation => :3,
p_deq_condition => null, p_message_count => :4, p_max_error_count => :5 ); END
69,359,054 0 N/A 41.3 9980.60 10159.36 86xp3qt4czvy5
Module: JDBC Thin Client
begin :v1 := AR_BUS_EVENT_SUB_PVT.AutoRcpt_Run(:v2, :v3); end;
60,043,663 1 ############ 35.7 9791.15 9805.93 bf8wy6bhr6nak
Module: JDBC Thin Client
SELECT C.CUSTOMER_ID CUSTOMER_ID, C.CUSTOMER_SITE_USE_ID SITE_USE_ID, C.CURRENCY
RCPT_CURRENCY, CR1.AMOUNT LAST_PAYMENT_AMOUNT, CR1.RECEIPT_DATE LAST_PAYMENT_DA
TE, CR1.RECEIPT_NUMBER LAST_PAYMENT_NUMBER FROM ( SELECT A.CUSTOMER_ID, A.CUSTOM
ER_SITE_USE_ID, A.CURRENCY, MAX(B.CASH_RECEIPT_ID) CASH_RECEIPT_ID FROM ( SELECT
9,346,430 0 N/A 5.6 59.53 133.04 32fwmj6fsaqm9
Module: 01@<elease11i/appl_top/bzqi/1.0/sql/BZAUTOCT.sql
DECLARE p_row_id VARCHAR2(30); p_batch_id ar_batches.batch_id%
TYPE; p_batch_date ar_batches.batch_date%TYPE; p_currency_code
ar_batches.currency_code%TYPE; p_name ar_batches.name%TYPE; p_
comments ar_batches.comments%TYPE; p_exchange_date ar_batches.exchangI also found that the object: FND_CONCURRENT_REQUE had 5,826 row lock waits
but i dnt know how much time its took.
Also it had 538 buffef bussy waits.
Could you suggest what to do with this information ?
Segments by Row Lock Waits
Row
Tablespace Subobject Obj. Lock % of
Owner Name Object Name Name Type Waits Capture
APPLSYS APPL_DATA FND_CONCURRENT_REQUE TABLE 5,826 79.28
APPLSYS APPL_DATA SYS_IOT_TOP_497864 INDEX 794 10.80
Segments by Buffer Busy Waits
Buffer
Tablespace Subobject Obj. Busy % of
Owner Name Object Name Name Type Waits Capture
APPLSYS APPL_DATA FND_CONCURRENT_REQUE TABLE 538 65.93
APPLSYS APPL_DATA SYS_IOT_TOP_11597965 INDEX 247 30.27
APPLSYS APPL_INDEX FND_CONCURRENT_REQUE INDEX 4 .49
-------------------------------------------------------------The last interesting thing that i founs is that the shared pool may too small:
I have 32% miss.
Library Cache Activity
Get Pct Pin Pct Invali-
Namespace Requests Miss Requests Miss Reloads dations
SQL AREA 11,593 32.7 5,723,318 0.2 7,095 1,659
-------------------------------------------------------------user10634138 wrote:
Yet i still have a "nasty" huge plsql block (sqlid=32fwmj6fsaqm9) that run more than : 80973 sec (about 21 hour).
select last_call_et,status
from v$session
where sid= 97
LAST_CALL_ET STATUS
80973 ACTIVE
The last_call_et would be from the moment the front-end code called the pl/sql block, and since then the pl/sql could have been running a loop with a lot of deliberate waits (dbms_lock.sleep), or a number of different SQL statements that individually didn't consume huge resources or lose a lot of time, yet totalled a lot of time.
Simple check before you start tracing, and if the session is still alive: select * from v$session_event where sid = 97, select name, value from V$sessstat where sid = 97 and value != 0, to see what clues this gives you about the time. You never know, you may find that a lot of the time was spent waiting on "PL/SQL lock timer".
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
http://www.jlcomp.demon.co.uk
To post code, statspack/AWR report, execution plans or trace files, start and end the section with the tag {noformat}{noformat} (lowercase, curly brackets, no spaces) so that the text appears in fixed format.
"Science is more than a body of knowledge; it is a way of thinking"
Carl Sagan -
AWR Report - suggestions to improve performance.
Hi Folks,
Web application server version - 10.1.2.0.2
Database version - 10.1.0.4.0
OS version - AIX 5.3
WORKLOAD REPOSITORY report for
DB Name DB Id Instance Inst Num Release Cluster Host
xxxx 3419432639 xxxx 1 10.1.0.4.0 NO hostname
Snap Id Snap Time Sessions Curs/Sess
Begin Snap: 16598 07-Jul-09 16:30:54 23 60.7
End Snap: 16599 07-Jul-09 17:30:46 36 94.1
Elapsed: 59.88 (mins)
DB Time: 44.99 (mins)
Cache Sizes (end)
~~~~~~~~~~~~~~~~~
Buffer Cache: 1,536M Std Block Size: 8K
Shared Pool Size: 1,248M Log Buffer: 1,024K
Load Profile
~~~~~~~~~~~~ Per Second Per Transaction
Redo size: 30,495.86 138,156.74
Logical reads: 1,735.49 7,862.39
Block changes: 197.66 895.45
Physical reads: 564.70 2,558.28
Physical writes: 54.64 247.52
User calls: 2.00 9.04
Parses: 14.32 64.87
Hard parses: 1.37 6.22
Sorts: 5.83 26.42
Logons: 0.12 0.54
Executes: 72.71 329.38
Transactions: 0.22
% Blocks changed per Read: 11.39 Recursive Call %: 99.64
Rollback per transaction %: 17.53 Rows per Sort: 5933.99
Instance Efficiency Percentages (Target 100%)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Buffer Nowait %: 100.00 Redo NoWait %: 100.00
Buffer Hit %: 71.24 In-memory Sort %: 99.79
Library Hit %: 96.22 Soft Parse %: 90.41
Execute to Parse %: 80.31 Latch Hit %: 99.99
Parse CPU to Parse Elapsd %: 21.82 % Non-Parse CPU: 96.80
Shared Pool Statistics Begin End
Memory Usage %: 13.13 27.55
% SQL with executions>1: 61.04 15.52
% Memory for SQL w/exec>1: 60.96 12.31
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~ % Total
Event Waits Time (s) DB Time Wait Class
db file scattered read 135,977 1,204 44.62 User I/O
CPU time 547 20.26
db file sequential read 99,521 187 6.92 User I/O
log file parallel write 10,995 16 .59 System I/O
direct path write temp 7,225 13 .47 User I/O
Wait Events DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> s - second
-> cs - centisecond - 100th of a second
-> ms - millisecond - 1000th of a second
-> us - microsecond - 1000000th of a second
-> ordered by wait time desc, waits desc (idle events last)
Avg
Total Wait wait Waits
Event Waits Timeouts Time (s) (ms) /txn
db file scattered read 135,977 0 1,204 9 171.5
db file sequential read 99,521 0 187 2 125.5
log file parallel write 10,995 0 16 1 13.9
direct path write temp 7,225 0 13 2 9.1
process startup 117 1 7 58 0.1
latch: library cache 306 0 5 15 0.4
direct path read temp 152,490 0 4 0 192.3
db file parallel write 342 0 4 11 0.4
log file sync 309 3 4 13 0.4
db file parallel read 359 0 3 8 0.5
latch: cache buffers lru ch 80 0 2 19 0.1
control file parallel write 1,325 0 1 1 1.7
latch: row cache objects 26 0 1 51 0.0
latch: cache buffers chains 138 138 1 9 0.2
log file switch completion 3 0 1 399 0.0
buffer busy waits 94 0 1 10 0.1
latch: shared pool 44 0 0 6 0.1
control file sequential rea 1,258 0 0 0 1.6
latch: object queue header 3 0 0 41 0.0
SQL*Net message to client 5,866 0 0 0 7.4
LGWR wait for redo copy 495 1 0 0 0.6
direct path read 58 0 0 1 0.1
latch: session allocation 6 0 0 6 0.0
latch: In memory undo latch 3 0 0 10 0.0
SQL*Net break/reset to clie 62 0 0 0 0.1
control file single write 40 0 0 1 0.1
latch: redo allocation 12 0 0 2 0.0
latch free 2 0 0 11 0.0
enq: TX - index contention 1 0 0 21 0.0
latch: messages 8 0 0 2 0.0
log file single write 2 0 0 4 0.0
direct path write 99 0 0 0 0.1
SQL*Net more data to client 237 0 0 0 0.3
log file sequential read 2 0 0 2 0.0
latch: library cache lock 1 0 0 3 0.0
latch: enqueue hash chains 3 0 0 0 0.0
SQL*Net more data from clie 2 0 0 0 0.0
SQL*Net message from client 5,855 0 23,607 4032 7.4
jobq slave wait 3,441 3,334 9,925 2884 4.3
Queue Monitor Wait 1,537 623 3,532 2298 1.9
Queue Monitor Slave Wait 503 0 3,532 7022 0.6
wakeup time manager 12 0 3,527 293898 0.0
virtual circuit status 120 120 3,512 29266 0.2
class slave wait 2 2 10 4883 0.0
Background Wait Events DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> ordered by wait time desc, waits desc (idle events last)
Avg
Total Wait wait Waits
Event Waits Timeouts Time (s) (ms) /txn
log file parallel write 10,995 0 16 1 13.9
process startup 117 1 7 58 0.1
db file sequential read 1,255 0 4 3 1.6
db file parallel write 342 0 4 11 0.4
control file parallel write 1,329 0 1 1 1.7
db file scattered read 151 0 1 7 0.2
latch: cache buffers lru ch 32 0 0 15 0.0
latch: library cache 5 0 0 69 0.0
control file sequential rea 213 0 0 1 0.3
latch: cache buffers chains 2 2 0 34 0.0
LGWR wait for redo copy 495 1 0 0 0.6
control file single write 40 0 0 1 0.1
latch: redo allocation 12 0 0 2 0.0
latch: messages 8 0 0 2 0.0
latch: object queue header 2 0 0 8 0.0
log file single write 2 0 0 4 0.0
direct path write 25 0 0 0 0.0
buffer busy waits 1 0 0 7 0.0
latch: shared pool 2 0 0 2 0.0
log file sequential read 2 0 0 2 0.0
direct path read 22 0 0 0 0.0
rdbms ipc message 15,461 10,346 26,675 1725 19.5
Queue Monitor Wait 1,537 623 3,532 2298 1.9
Queue Monitor Slave Wait 503 0 3,532 7022 0.6
wakeup time manager 12 0 3,527 293898 0.0
smon timer 175 8 3,418 19530 0.2
Time Model Statistics DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> ordered by Time (seconds) desc
Time % Total
Statistic Name (seconds) DB Time
sql execute elapsed time 2,708.75 100.35
DB time 2,699.22 100.00
DB CPU 546.94 20.26
background elapsed time 113.64 4.21
parse time elapsed 90.88 3.37
hard parse elapsed time 59.03 2.19
PL/SQL execution elapsed time 56.46 2.09
Java execution elapsed time 8.99 .33
background cpu time 8.18 .30
PL/SQL compilation elapsed time 4.55 .17
connection management call elapsed time 1.08 .04
failed parse elapsed time .73 .03
hard parse (sharing criteria) elapsed time .70 .03
hard parse (bind mismatch) elapsed time .61 .02
sequence load elapsed time .41 .02
inbound PL/SQL rpc elapsed time .00 .00
failed parse (out of shared memory) elapsed t .00 .00
Operating System Statistics DB/Inst: xxxx/xxxx Snaps: 16598-16599
Statistic Name Value
AVG_BUSY_TICKS 771,364
AVG_IDLE_TICKS 346,024
AVG_IN_BYTES 3,812,632,576
AVG_IOWAIT_TICKS 38,470
AVG_OUT_BYTES 1,141,137,408
AVG_SYS_TICKS 2,786
AVG_USER_TICKS 13,588
BUSY_TICKS 3,085,837
IDLE_TICKS 1,384,395
IN_BYTES 15,250,530,304
IOWAIT_TICKS 154,103
OS_CPU_WAIT_TIME 70,200
OUT_BYTES 4,564,549,632
RSRC_MGR_CPU_WAIT_TIME 0
SYS_TICKS 11,439
USER_TICKS 54,613
Service Statistics DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> ordered by DB Time
Physical Logical
Service Name DB Time (s) DB CPU (s) Reads Reads
xxxx 2,032.9 519.7 1,804,948 5,709,611
SYS$USERS 666.3 27.2 219,320 501,732
SYS$BACKGROUND 0.0 0.0 4,565 28,708
xxxxXDB 0.0 0.0 0 0
Service Wait Class Stats DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> Wait Class info for services in the Service Statistics section.
-> Total Waits and Time Waited displayed for the following wait
classes: User I/O, Concurrency, Administrative, Network
-> Time Waited (Wt Time) in centisecond (100th of a second)
Service Name
User I/O User I/O Concurcy Concurcy Admin Admin Network Network
Total Wts Wt Time Total Wts Wt Time Total Wts Wt Time Total Wts Wt Time
xxxx
374696 127922 0 0 0 0 3701 7
SYS$USERS
18820 12406 172 222 0 0 2129 0
SYS$BACKGROUND
2218 783 0 0 0 0 0 0
SQL ordered by Elapsed Time DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> Resources reported for PL/SQL code includes the resources used by all SQL
statements called by the code.
-> % Total DB Time is the Elapsed Time of the SQL statement divided
into the Total Database Time multiplied by 100
<<<<<<<<<<<<<<<<<<<<<<<<<<<SQLs Deleted >>>>>>>>>>>>
SQL ordered by Sharable Memory DB/Inst: xxxx/xxxx Snaps: 16598-16599
No data exists for this section of the report.
SQL ordered by Version Count DB/Inst: xxxx/xxxx Snaps: 16598-16599
No data exists for this section of the report.
Instance Activity Stats DB/Inst: xxxx/xxxx Snaps: 16598-16599
Statistic Total per Second per Trans
CPU used by this session 53,470 14.9 67.4
CPU used when call started 51,928 14.5 65.5
CR blocks created 5,298 1.5 6.7
Cached Commit SCN referenced 192,226 53.5 242.4
Commit SCN cached 3,613 1.0 4.6
DB time 1,253,838 349.0 1,581.1
DBWR checkpoint buffers written 4,304 1.2 5.4
DBWR checkpoints 1 0.0 0.0
DBWR transaction table writes 59 0.0 0.1
DBWR undo block writes 5,557 1.6 7.0
IMU CR rollbacks 1 0.0 0.0
IMU Flushes 191 0.1 0.2
IMU Redo allocation size 860,820 239.6 1,085.5
IMU commits 381 0.1 0.5
IMU contention 5 0.0 0.0
IMU ktichg flush 1 0.0 0.0
IMU undo allocation size 1,839,872 512.1 2,320.1
SQL*Net roundtrips to/from clien 5,591 1.6 7.1
active txn count during cleanout 948 0.3 1.2
application wait time 4 0.0 0.0
background checkpoints completed 1 0.0 0.0
background checkpoints started 1 0.0 0.0
background timeouts 10,366 2.9 13.1
buffer is not pinned count 2,387,595 664.6 3,010.8
buffer is pinned count 792,051 220.5 998.8
bytes received via SQL*Net from 333,467 92.8 420.5
bytes sent via SQL*Net to client 2,449,972 682.0 3,089.5
calls to get snapshot scn: kcmgs 319,869 89.0 403.4
calls to kcmgas 17,576 4.9 22.2
calls to kcmgcs 1,912 0.5 2.4
change write time 2,175 0.6 2.7
cleanout - number of ktugct call 4,589 1.3 5.8
cluster key scan block gets 579,340 161.3 730.6
cluster key scans 283,013 78.8 356.9
commit cleanout failures: block 1 0.0 0.0
commit cleanout failures: buffer 1 0.0 0.0
commit cleanout failures: callba 1 0.0 0.0
commit cleanout failures: cannot 5 0.0 0.0
commit cleanouts 25,713 7.2 32.4
commit cleanouts successfully co 25,705 7.2 32.4
commit txn count during cleanout 4,110 1.1 5.2
concurrency wait time 650 0.2 0.8
consistent changes 7,352 2.1 9.3
consistent gets 5,509,829 1,533.7 6,948.1
consistent gets - examination 1,061,141 295.4 1,338.1
consistent gets direct 39 0.0 0.1
consistent gets from cache 5,509,790 1,533.7 6,948.0
cursor authentications 310 0.1 0.4
data blocks consistent reads - u 6,747 1.9 8.5
db block changes 710,092 197.7 895.5
db block gets 725,044 201.8 914.3
db block gets direct 14,789 4.1 18.7
db block gets from cache 710,255 197.7 895.7
deferred (CURRENT) block cleanou 14,036 3.9 17.7
dirty buffers inspected 9,309 2.6 11.7
enqueue conversions 926 0.3 1.2
enqueue releases 92,643 25.8 116.8
enqueue requests 92,643 25.8 116.8
enqueue waits 1 0.0 0.0
execute count 261,199 72.7 329.4
Instance Activity Stats DB/Inst: xxxx/xxxx Snaps: 16598-16599
Statistic Total per Second per Trans
free buffer inspected 1,719,681 478.7 2,168.6
free buffer requested 1,804,893 502.4 2,276.0
heap block compress 1,617 0.5 2.0
hot buffers moved to head of LRU 295,841 82.4 373.1
immediate (CR) block cleanout ap 3,664 1.0 4.6
immediate (CURRENT) block cleano 6,108 1.7 7.7
index fast full scans (full) 533 0.2 0.7
index fetch by key 582,804 162.2 734.9
index scans kdiixs1 328,534 91.5 414.3
leaf node 90-10 splits 190 0.1 0.2
leaf node splits 353 0.1 0.5
logons cumulative 426 0.1 0.5
messages received 5,699 1.6 7.2
messages sent 5,699 1.6 7.2
no buffer to keep pinned count 0 0.0 0.0
no work - consistent read gets 4,088,134 1,137.9 5,155.3
opened cursors cumulative 46,867 13.1 59.1
parse count (failures) 27 0.0 0.0
parse count (hard) 4,933 1.4 6.2
parse count (total) 51,443 14.3 64.9
parse time cpu 1,748 0.5 2.2
parse time elapsed 8,012 2.2 10.1
physical read IO requests 390,490 108.7 492.4
physical reads 2,028,713 564.7 2,558.3
physical reads cache 1,793,229 499.2 2,261.3
physical reads cache prefetch 1,557,452 433.5 1,964.0
physical reads direct 235,484 65.6 297.0
physical reads direct (lob) 36 0.0 0.1
physical reads direct temporary 235,426 65.5 296.9
physical reads prefetch warmup 6,031 1.7 7.6
physical write IO requests 15,092 4.2 19.0
physical writes 196,287 54.6 247.5
physical writes direct 179,731 50.0 226.7
physical writes direct (lob) 39 0.0 0.1
physical writes direct temporary 179,664 50.0 226.6
physical writes from cache 16,556 4.6 20.9
physical writes non checkpoint 194,791 54.2 245.6
pinned buffers inspected 2 0.0 0.0
prefetch warmup blocks aged out 1,292 0.4 1.6
prefetched blocks aged out befor 293,795 81.8 370.5
process last non-idle time 1,954 0.5 2.5
recursive calls 1,997,982 556.1 2,519.5
recursive cpu usage 50,834 14.2 64.1
redo blocks written 224,755 62.6 283.4
redo buffer allocation retries 3 0.0 0.0
redo entries 357,063 99.4 450.3
redo log space requests 3 0.0 0.0
redo log space wait time 123 0.0 0.2
redo ordering marks 5,391 1.5 6.8
redo size 109,558,292 30,495.9 138,156.7
redo synch time 398 0.1 0.5
redo synch writes 300 0.1 0.4
redo wastage 1,486,252 413.7 1,874.2
redo write time 1,657 0.5 2.1
redo writer latching time 7 0.0 0.0
redo writes 5,499 1.5 6.9
rollback changes - undo records 5,688 1.6 7.2
rows fetched via callback 96,659 26.9 121.9
session connect time 0 0.0 0.0
session logical reads 6,234,873 1,735.5 7,862.4
Instance Activity Stats DB/Inst: xxxx/xxxx Snaps: 16598-16599
Statistic Total per Second per Trans
session pga memory 162,220,520 45,154.5 204,565.6
session pga memory max 341,641,032 95,096.7 430,821.0
session uga memory 790,286,168,264 219,978,374.3 #############
session uga memory max 267,584,080 74,482.8 337,432.6
shared hash latch upgrades - no 327,865 91.3 413.5
shared hash latch upgrades - wai 47 0.0 0.1
sorts (disk) 44 0.0 0.1
sorts (memory) 20,909 5.8 26.4
sorts (rows) 124,334,820 34,609.0 156,790.4
summed dirty queue length 10,849 3.0 13.7
switch current to new buffer 125 0.0 0.2
table fetch by rowid 362,785 101.0 457.5
table fetch continued row 1,811 0.5 2.3
table scan blocks gotten 2,989,662 832.2 3,770.1
table scan rows gotten 102,945,486 28,655.2 129,817.8
table scans (long tables) 65 0.0 0.1
table scans (short tables) 8,082 2.3 10.2
transaction rollbacks 72 0.0 0.1
undo change vector size 40,524,316 11,280.1 51,102.5
user I/O wait time 140,959 39.2 177.8
user calls 7,168 2.0 9.0
user commits 654 0.2 0.8
user rollbacks 139 0.0 0.2
workarea executions - onepass 30 0.0 0.0
workarea executions - optimal 13,486 3.8 17.0
write clones created in foregrou 6 0.0 0.0
-------------------------------------------------------------contd on next ...
Edited by: LazyDBA10g on Jul 8, 2009 4:50 AMInstance Activity Stats - Absolute Values DB/Inst: xxxx/xxxx Snaps: 1
-> Statistics with absolute values (should not be diffed)
-> Statistics identified by '(derived)' come from sources other than SYSSTAT
Statistic Begin Value End Value
opened cursors current 1,397 3,387
logons current 23 36
Instance Activity Stats - Thread Activity DB/Inst: xxxx/xxxx Snaps: 16
Statistic Total per Hour
log switches (derived) 1 1.00
Tablespace IO Stats DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> ordered by IOs (Reads + Writes) desc
Tablespace
Av Av Av Av Buffer Av Buf
Reads Reads/s Rd(ms) Blks/Rd Writes Writes/s Waits Wt(ms)
TEMP2
153,326 43 0.2 1.6 6,040 2 0 0.0
AA_DATA
115,909 32 5.8 7.6 217 0 0 0.0
AA_WEB
57,358 16 9.1 12.8 2,200 1 0 0.0
AA_INDEX
43,576 12 3.3 3.3 738 0 0 0.0
AA_WEB_IDX
11,475 3 2.9 1.1 6 0 0 0.0
SYSTEM
5,575 2 3.8 1.4 2,528 1 61 16.1
SYSAUX
3,017 1 5.3 1.4 2,401 1 5 0.0
UNDOTBS1
262 0 5.0 1.0 955 0 28 0.0
AA_LOB
36 0 13.6 5.5 3 0 0 0.0
USERS
3 0 33.3 1.0 3 0 0 0.0
EXAMPLE
1 0 40.0 1.0 1 0 0 0.0
File IO Stats DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> ordered by Tablespace, File
Tablespace Filename
Av Av Av Av Buffer Av Buf
Reads Reads/s Rd(ms) Blks/Rd Writes Writes/s Waits Wt(ms)
EXAMPLE /AAA/oradata/xxxx/example01.dbf
1 0 40.0 1.0 1 0 0 0.0
SYSAUX /AAA/oradata/xxxx/sysaux01.dbf
3,017 1 5.3 1.4 2,401 1 5 0.0
SYSTEM /AAA/oradata/xxxx/system01.dbf
5,575 2 3.8 1.4 2,528 1 61 16.1
TEMP2 /AAA/oradata/xxxx/TEMP02.DBFf
153,324 43 0.2 1.6 6,040 2 0
TEMP2 /AAA/oradata/xxxx/TEMP03.DBF
2 0 5.0 1.0 0 0 0
UNDOTBS1 /AAA/oradata/xxxx/undotbs01.dbf
181 0 4.9 1.0 307 0 3 0.0
UNDOTBS1 /AAA/oradata/xxxx/undotbs02.dbf
70 0 5.6 1.0 157 0 20 0.0
UNDOTBS1 /AAA/oradata/xxxx/undotbs021.dbf
11 0 2.7 1.0 491 0 5 0.0
USERS /AAA/oradata/xxxx/users01.dbf
1 0 50.0 1.0 1 0 0 0.0
USERS /AAA/oradata/xxxx/users02.dbf
1 0 30.0 1.0 1 0 0 0.0
USERS /AAA/oradata/xxxx/users03.dbf
1 0 20.0 1.0 1 0 0 0.0
AA_DATA /AAA/oradata/xxxx/AA_DATA01.DBF
28,830 8 5.8 7.6 80 0 0 0.0
AA_DATA /AAA/oradata/xxxx/AA_DATA02.DBF
30,068 8 5.8 7.5 34 0 0 0.0
AA_DATA /AAA/oradata/xxxx/AA_DATA03.DBF
28,669 8 5.8 7.5 56 0 0 0.0
AA_DATA /AAA/oradata/xxxx/AA_DATA04.DBF
28,342 8 5.9 7.7 47 0 0 0.0
AA_INDEX /AAA/oradata/xxxx/AA_INDEX01.DBF
22,286 6 3.1 3.2 439 0 0 0.0
AA_INDEX /AAA/oradata/xxxx/AA_INDEX02.DBF
21,290 6 3.4 3.3 299 0 0 0.0
AA_LOB /AAA/oradata/xxxx/AA_LOB01.DBF
20 0 11.0 5.4 1 0 0 0.0
AA_LOB /AAA/oradata/xxxx/AA_LOB02.DBF
11 0 17.3 5.5 1 0 0 0.0
AA_LOB /AAA/oradata/xxxx/AA_LOB03.DBF
5 0 16.0 6.2 1 0 0 0.0
AA_WEB /AAA/oradata/xxxx/AA_WEB01.DBF
28,640 8 9.2 12.8 1,079 0 0 0.0
AA_WEB /AAA/oradata/xxxx/AA_WEB02.DBF
28,718 8 9.0 12.8 1,121 0 0 0.0
AA_WEB_IDX /AAA/oradata/xxxx/AA_WEB_IDX01.DBF
5,068 1 2.8 1.2 2 0 0 0.0
AA_WEB_IDX /AAA/oradata/xxxx/AA_WEB_IDX02.DBF
6,407 2 2.9 1.1 4 0 0 0.0
Buffer Pool Statistics DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> Standard block size Pools D: default, K: keep, R: recycle
-> Default Pools for other block sizes: 2k, 4k, 8k, 16k, 32k
Free Writ Buffer
Number of Pool Buffer Physical Physical Buff Comp Busy
P Buffers Hit% Gets Reads Writes Wait Wait Waits
D 190,848 71 6,220,953 1,793,255 16,556 0 0 94
Instance Recovery Stats DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> B: Begin snapshot, E: End snapshot
Targt Estd Log File Log Ckpt Log Ckpt
MTTR MTTR Recovery Actual Target Size Timeout Interval
(s) (s) Estd IOs Redo Blks Redo Blks Redo Blks Redo Blks Redo Blks
B 0 8 155 955 5359 360000 5359
E 0 9 311 1177 4572 360000 4572
Buffer Pool Advisory DB/Inst: xxxx/xxxx Snap: 16599
-> Only rows with estimated physical reads >0 are displayed
-> ordered by Block Size, Buffers For Estimate
Size for Size Buffers for Est Physical Estimated
P Estimate (M) Factr Estimate Read Factor Physical Reads
D 144 .1 17,892 1.97 3,571,363
D 288 .2 35,784 1.62 2,936,281
D 432 .3 53,676 1.57 2,850,391
D 576 .4 71,568 1.44 2,616,052
D 720 .5 89,460 1.33 2,414,217
D 864 .6 107,352 1.15 2,091,986
D 1,008 .7 125,244 1.04 1,882,876
D 1,152 .8 143,136 1.02 1,857,287
D 1,296 .8 161,028 1.02 1,844,981
D 1,440 .9 178,920 1.01 1,830,107
D 1,536 1.0 190,848 1.00 1,816,003
D 1,584 1.0 196,812 0.98 1,785,023
D 1,728 1.1 214,704 0.93 1,688,213
D 1,872 1.2 232,596 0.89 1,613,261
D 2,016 1.3 250,488 0.88 1,594,176
D 2,160 1.4 268,380 0.87 1,584,933
D 2,304 1.5 286,272 0.87 1,582,965
D 2,448 1.6 304,164 0.86 1,569,802
D 2,592 1.7 322,056 0.86 1,569,169
D 2,736 1.8 339,948 0.86 1,568,758
D 2,880 1.9 357,840 0.86 1,568,194
PGA Aggr Summary DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> PGA cache hit % - percentage of W/A (WorkArea) data processed only in-memory
PGA Cache Hit % W/A MB Processed Extra W/A MB Read/Written
88.0 4,058 552
PGA Aggr Target Stats DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> B: Begin snap E: End snap (rows dentified with B or E contain data
which is absolute i.e. not diffed over the interval)
-> Auto PGA Target - actual workarea memory target
-> W/A PGA Used - amount of memory used for all Workareas (manual + auto)
-> %PGA W/A Mem - percentage of PGA memory allocated to workareas
-> %Auto W/A Mem - percentage of workarea memory controlled by Auto Mem Mgmt
-> %Man W/A Mem - percentage of workarea memory under manual control
%PGA %Auto %Man
PGA Aggr Auto PGA PGA Mem W/A PGA W/A W/A W/A Global Mem
Target(M) Target(M) Alloc(M) Used(M) Mem Mem Mem Bound(K)
B 500 432 57.5 0.0 .0 .0 .0 25,600
E 500 428 70.2 0.0 .0 .0 .0 25,600
PGA Aggr Target Histogram DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> Optimal Executions are purely in-memory operations
Low High
Optimal Optimal Total Execs Optimal Execs 1-Pass Execs M-Pass Execs
2K 4K 11,726 11,726 0 0
64K 128K 256 256 0 0
128K 256K 206 206 0 0
256K 512K 583 583 0 0
512K 1024K 363 363 0 0
1M 2M 124 124 0 0
2M 4M 107 107 0 0
4M 8M 66 64 2 0
8M 16M 49 35 14 0
16M 32M 52 39 13 0
32M 64M 3 2 1 0
64M 128M 4 4 0 0
128M 256M 2 2 0 0
PGA Memory Advisory DB/Inst: xxxx/xxxx Snap: 16599
-> When using Auto Memory Mgmt, minimally choose a pga_aggregate_target value
where Estd PGA Overalloc Count is 0
Estd Extra Estd PGA Estd PGA
PGA Target Size W/A MB W/A MB Read/ Cache Overalloc
Est (MB) Factr Processed Written to Disk Hit % Count
63 0.1 4,098.7 2,609.3 61.0 0
125 0.3 4,098.7 1,521.6 73.0 0
250 0.5 4,098.7 1,354.7 75.0 0
375 0.8 4,098.7 1,109.3 79.0 0
500 1.0 4,098.7 373.4 92.0 0
600 1.2 4,098.7 71.6 98.0 0
700 1.4 4,098.7 41.6 99.0 0
800 1.6 4,098.7 41.6 99.0 0
900 1.8 4,098.7 0.0 100.0 0
1,000 2.0 4,098.7 0.0 100.0 0
1,500 3.0 4,098.7 0.0 100.0 0
2,000 4.0 4,098.7 0.0 100.0 0
3,000 6.0 4,098.7 0.0 100.0 0
4,000 8.0 4,098.7 0.0 100.0 0
Shared Pool Advisory DB/Inst: xxxx/xxxx Snap: 16599
-> SP: Shared Pool Est LC: Estimated Library Cache Factr: Factor
-> Note there is often a 1:Many correlation between a single logical object
in the Library Cache, and the physical number of memory objects associated
with it. Therefore comparing the number of Lib Cache objects (e.g. in
v$librarycache), with the number of Lib Cache Memory Objects is invalid.
Est LC Est LC Est LC Est LC
Shared SP Est LC Time Time Load Load Est LC
Pool Size Size Est LC Saved Saved Time Time Mem
Size(M) Factr (M) Mem Obj (s) Factr (s) Factr Obj Hits
224 .2 130 9,174 380 1.0 91 1.0 408,867
352 .3 171 12,647 381 1.0 90 1.0 409,226
480 .4 171 12,647 381 1.0 90 1.0 409,226
608 .5 171 12,647 381 1.0 90 1.0 409,226
736 .6 171 12,647 381 1.0 90 1.0 409,226
864 .7 171 12,647 381 1.0 90 1.0 409,226
992 .8 171 12,647 381 1.0 90 1.0 409,226
1,120 .9 171 12,647 381 1.0 90 1.0 409,226
1,248 1.0 171 12,647 381 1.0 90 1.0 409,226
1,376 1.1 171 12,647 381 1.0 90 1.0 409,226
1,504 1.2 171 12,647 381 1.0 90 1.0 409,226
1,632 1.3 171 12,647 381 1.0 90 1.0 409,226
1,760 1.4 171 12,647 381 1.0 90 1.0 409,226
1,888 1.5 171 12,647 381 1.0 90 1.0 409,226
2,016 1.6 171 12,647 381 1.0 90 1.0 409,226
2,144 1.7 171 12,647 381 1.0 90 1.0 409,226
2,272 1.8 171 12,647 381 1.0 90 1.0 409,226
2,400 1.9 171 12,647 381 1.0 90 1.0 409,226
2,528 2.0 171 12,647 381 1.0 90 1.0 409,226
Java Pool Advisory DB/Inst: xxxx/xxxx Snap: 16599
Est LC Est LC Est LC Est LC
Java JP Est LC Time Time Load Load Est LC
Pool Size Size Est LC Saved Saved Time Time Mem
Size(M) Factr (M) Mem Obj (s) Factr (s) Factr Obj Hits
32 .1 6 142 2 1.0 23 1.0 142
64 .3 6 142 2 1.0 23 1.0 142
96 .4 6 142 2 1.0 23 1.0 142
128 .5 6 142 2 1.0 23 1.0 142
160 .6 6 142 2 1.0 23 1.0 142
192 .8 6 142 2 1.0 23 1.0 142
224 .9 6 142 2 1.0 23 1.0 142
256 1.0 6 142 2 1.0 23 1.0 142
288 1.1 6 142 2 1.0 23 1.0 142
320 1.3 6 142 2 1.0 23 1.0 142
352 1.4 6 142 2 1.0 23 1.0 142
384 1.5 6 142 2 1.0 23 1.0 142
416 1.6 6 142 2 1.0 23 1.0 142
448 1.8 6 142 2 1.0 23 1.0 142
480 1.9 6 142 2 1.0 23 1.0 142
512 2.0 6 142 2 1.0 23 1.0 142
Buffer Wait Statistics DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> ordered by wait time desc, waits desc
Class Waits Total Wait Time (s) Avg Time (ms)
data block 66 1 15
undo block 25 0 0
undo header 3 0 0
Enqueue Activity DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> Enqueue stats gathered prior to 10i should not be compared with 10i data
-> ordered by Wait Time desc, Waits desc
Enqueue Type (Request Reason)
Requests Succ Gets Failed Gets Waits Wt Time (s) Av Wt Time(ms)
TX-Transaction (index contention)
1 1 0 1 0 22.00
Undo Segment Summary DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> Undo segment block stats:
-> uS - unexpired Stolen, uR - unexpired Released, uU - unexpired reUsed
-> eS - expired Stolen, eR - expired Released, eU - expired reUsed
Undo Undo Num Max Qry Max Tx Snap OutOf uS/uR/uU/
TS# Blocks Trans Len (s) Concurcy TooOld Space eS/eR/eU
1 5,497 6,716 2,708 4 0 0 0/0/0/0/0/0
Undo Segment Stats DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> ordered by Time desc
Undo Num Max Qry Max Tx Snap OutOf uS/uR/uU/
End Time Blocks Trans Len (s) Concy TooOld Space eS/eR/eU
07-Jul 17:24 26 161 2,708 1 0 0 0/0/0/0/0/0
07-Jul 17:14 27 143 2,108 2 0 0 0/0/0/0/0/0
07-Jul 17:04 27 226 1,508 1 0 0 0/0/0/0/0/0
07-Jul 16:54 1,565 1,734 204 4 0 0 0/0/0/0/0/0
07-Jul 16:44 2,985 3,078 145 4 0 0 0/0/0/0/0/0
07-Jul 16:34 867 1,374 0 4 0 0 0/0/0/0/0/0
Latch Activity DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> "Get Requests", "Pct Get Miss" and "Avg Slps/Miss" are statistics for
willing-to-wait latch get requests
-> "NoWait Requests", "Pct NoWait Miss" are for no-wait latch get requests
-> "Pct Misses" for both should be very close to 0.0
Pct Avg Wait Pct
Get Get Slps Time NoWait NoWait
Latch Name Requests Miss /Miss (s) Requests Miss
Consistent RBA 5,501 0.0 0 0
FOB s.o list latch 523 0.0 0 0
In memory undo latch 4,267 0.1 1.0 0 728 1.2
JOX SGA heap latch 22 0.0 0 0
JS queue state obj latch 25,992 0.0 0 0
JS slv state obj latch 338 0.0 0 0
KTF sga enqueue 8 0.0 0 1,092 0.0
KWQMN job cache list lat 12 0.0 0 0
KWQP Prop Status 415 0.0 0 0
MQL Tracking Latch 0 0 72 0.0
Memory Management Latch 18,075 0.0 0 1,207 0.0
PL/SQL warning settings 1,607 0.0 0 0
SQL memory manager latch 1 0.0 0 1,206 0.0
SQL memory manager worka 127,457 0.0 0.0 0 0
SWRF Alerted Metric Elem 13,029 0.0 0 0
Shared B-Tree 2,523 0.0 0 0
active checkpoint queue 1,560 0.0 0 0
active service list 6,791 0.0 0 0
archive control 8 0.0 0 0
begin backup scn array 40 0.0 0 0
cache buffer handles 4,560 0.0 0 0
cache buffers chains 14,704,024 0.0 0.2 1 3,447,993 0.0
cache buffers lru chain 62,381 0.3 0.4 2 3,121,799 0.4
channel handle pool latc 759 0.0 0 0
channel operations paren 14,505 0.0 0 0
checkpoint queue latch 67,923 0.0 0 16,481 0.0
child cursor hash table 36,508 0.0 0 0
client/application info 16 0.0 0 0
compile environment latc 1,063 0.0 0 0
cursor bind value captur 125 0.0 0 384 1.0
dictionary lookup 107 0.0 0 0
dml lock allocation 52,017 0.1 0.0 0 0
dummy allocation 839 0.4 0.0 0 0
enqueue hash chains 186,347 0.0 0.1 0 0
enqueues 122,225 0.0 0.0 0 0
event group latch 230 0.0 0 0
file cache latch 153 0.0 0 0
global KZLD latch for me 110 0.0 0 0
hash table column usage 512 0.0 0 138,833 0.0
hash table modification 125 0.0 0 0
internal temp table obje 3 0.0 0 0
job workq parent latch 0 0 388 0.0
job_queue_processes para 172 0.0 0 0
ksuosstats global area 243 0.0 0 0
ktm global data 175 0.0 0 0
kwqbsn:qsga 2,523 0.0 0 0
lgwr LWN SCN 6,225 0.0 0 0
library cache 1,069,757 0.1 0.3 5 2,857 227.5
library cache load lock 10,002 0.0 0 0
library cache lock 277,733 0.0 0.0 0 0
library cache lock alloc 4,092 0.0 0 0
library cache pin 776,264 0.0 0.0 0 0
library cache pin alloca 4,018 0.0 0 0
list of block allocation 1,044 0.0 0 0
loader state object free 460 0.0 0 0
longop free list parent 1,357 0.0 0 19,547 0.0
message pool operations 334 0.0 0 0
messages 37,979 0.0 0.9 0 0
mostly latch-free SCN 6,237 0.0 0.0 0 0
multiblock read objects 351,202 0.0 0.0 0 0
Latch Activity DB/Inst: xxxx/xxxx Snaps: 16598-16599
-> "Get Requests", "Pct Get Miss" and "Avg Slps/Miss" are statistics for
willing-to-wait latch get requests
-> "NoWait Requests", "Pct NoWait Miss" are for no-wait latch get requestscontd..............
Edited by: LazyDBA10g on Jul 8, 2009 4:51 AM -
Hi, I am using Oracle Applications 9 with DB 9ir2, and I like to know if exists any documentation that say the minimal MB that I must assign to the parameter SHARED_POOL_SIZE in my database. Actually I have 608 MB in the shared pool, but in the V$SHARED_POOL_ADVICE I view that I can reduce the size to 250 MB.
Someone know this?
How could I know looking in the Statspack report If the Shared Pool is right sized or If I need increase or decrease the size?
Please, I need help on this.
Thanks a lot!Thanks for the answer. Look my shared pool statistics taken of the statspack report:
Shared Pool Statistics Begin End
Memory Usage %: 85.53 86.25
% SQL with executions>1: 29.59 25.75
% Memory for SQL w/exec>1: 46.08 42.59I need to decrease or increase the Shared Pool? This is a database for an Application 9, exists some minimal value to set for the shared_pool_size?
This is the advisory of the shared pool taken of the statspack report:
Shared Pool Advisory:
-> Note there is often a 1:Many correlation between a single logical object
in the Library Cache, and the physical number of memory objects associated
with it. Therefore comparing the number of Lib Cache objects (e.g. in
v$librarycache), with the number of Lib Cache Memory Objects is invalid
Estd
Shared Pool SP Estd Estd Estd Lib LC Time
Size for Size Lib Cache Lib Cache Cache Time Saved Estd Lib Cache
Estim (M) Factr Size (M) Mem Obj Saved (s) Factr Mem Obj Hits
352 .6 320 83,387 6,248,540 1.0 231,336,205
416 .7 383 97,436 6,248,634 1.0 231,363,978
480 .8 446 112,332 6,248,704 1.0 231,389,862
544 .9 509 126,814 6,248,752 1.0 231,409,576
608 1.0 572 140,750 6,248,816 1.0 231,427,940
672 1.1 635 158,171 6,248,842 1.0 231,440,024
736 1.2 698 173,436 6,248,872 1.0 231,452,513
800 1.3 761 187,288 6,248,898 1.0 231,464,942
864 1.4 824 202,502 6,248,914 1.0 231,474,703
928 1.5 887 216,446 6,248,936 1.0 231,484,732
992 1.6 950 231,262 6,248,961 1.0 231,496,133
1,056 1.7 1,013 246,756 6,248,980 1.0 231,511,179
1,120 1.8 1,076 263,345 6,248,992 1.0 231,519,974
1,184 1.9 1,139 281,102 6,249,008 1.0 231,529,713
1,248 2.1 1,212 301,883 6,249,050 1.0 231,538,207
-------------------------------------------------------------Thanks a lot! -
Is it recommened to flush shared pool after taking statistics??
Hi, all.
The database is 2 node RAC 10.2.0.2.0 on 32-bit windows 2003 EE SP1.
I stoped the default statistics-gathering-job of GATHER_STATS_JOB
because it takes statistics of all objects in database and it runs everyday.
In addition, it seems to cause "library cache related" wait events in a RAC
environment.
I have a plan to take statistics of ONLY an application schema, not all objects
of a database, by using GATHER_SCHEMA_STATS procedure.
Is it recommended to flush shared pool after taking statistics of an application
schema??
Thanks and Regards.Is it recommended to flush shared pool after taking
statistics of an application
schema??neednt cause whenever you gather stats either its system or not oracle age out the plan and regenerate the new plan on the basis of new gathered stats,see how oracle is smart.
SQL> create table t as select rownum a,object_name
2 from all_objects
3 /
Table created.
SQL> alter system flush shared_pool
2 /
System altered.
SQL> alter session set sql_trace=true
2 /
Session altered.
SQL> declare
2 va t.a%type;
3 begin
4 for i in 1..100
5 loop
6 execute immediate 'analyze table t compute system statistics';
7 select a into va
8 from t
9 where a=i;
10 end loop;
11 end;
12 /
PL/SQL procedure successfully completed.
SELECT a from t
where a=:b1
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 100 0.12 0.11 0 0 0 0
Fetch 100 0.26 0.32 0 11800 0 100
total 201 0.39 0.44 0 11800 0 100
Misses in library cache during parse: 1
Misses in library cache during execute: 99
Optimizer goal: CHOOSE
Parsing user id: 59 (recursive depth: 1)
Rows Row Source Operation
1 TABLE ACCESS FULL T
Misses in library cache during execute: 99 shows you aging out the plan after every gathering stats.
Khurram -
AWR Report -- Buffer Pool Advisory
Hi,
does anyone know in that kind of measurement the "Estimated Phys Reads (thousands)" from buffer pool advisory is ?
I mean in seconds ? in hours ? addicted to the time period the report was written ?
http://img.ly/images/6379055/full
Thanks a lot
*TRe,
OK it makes it a little bit clearer.
What I now think to understand is that the "Estimated Phys Reads (thousands) no represents the
current workload of the system it only gives clue that there will be a change around 3 times more blocks was red.
Right ?
But if it is like that why these numbers are changing from one to another report....
So again another image.... Maybe my problem is that I try to set the current workload (phys block reads) in comparison with the "Estimated Phy Reads from the Advisory....
Our AWR reports are generated every hour.
http://img.ly/qNfn
Sorry for my understanding problem... I also will try to check if the views gave other information than the ARW report.
*T -
Oracle Version: 11.1.0.7 64x
OS Version: Windows 2008 Server 64x
Hi There,
We're just trying to generate a awr report for one of our databases and the report is coming out with no data.
statistics_level parameter is set to "TYPICAL"; any idea to what's going on please?
Thanks
SQL>
SQL> @?/rdbms/admin/awrrpt.sql
Current Instance
~~~~~~~~~~~~~~~~
DB Id DB Name Inst Num Instance
1391811405 WEBTST 1 webtst
Specify the Report Type
~~~~~~~~~~~~~~~~~~~~~~~
Would you like an HTML report, or a plain text report?
Enter 'html' for an HTML report, or 'text' for plain text
Defaults to 'html'
Enter value for report_type: text
Type Specified: text
Instances in this Workload Repository schema
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
DB Id Inst Num DB Name Instance Host
* 1391811405 1 WEBTST webtst WEBDBTST
Using 1391811405 for database Id
Using 1 for instance number
Specify the number of days of snapshots to choose from
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Entering the number of days (n) will result in the most recent
(n) days of snapshots being listed. Pressing <return> without
specifying a number lists all completed snapshots.
Enter value for num_days: 1
Listing the last day's Completed Snapshots
Snap
Instance DB Name Snap Id Snap Started Level
webtst WEBTST 43973 12 May 2011 00:00 1
43974 12 May 2011 01:00 1
43975 12 May 2011 02:00 1
43976 12 May 2011 03:00 1
43977 12 May 2011 04:00 1
43978 12 May 2011 05:00 1
43979 12 May 2011 06:00 1
43980 12 May 2011 07:00 1
43981 12 May 2011 08:00 1
43982 12 May 2011 09:00 1
43983 12 May 2011 10:00 1
43984 12 May 2011 11:00 1
43985 12 May 2011 11:02 1
Specify the Begin and End Snapshot Ids
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Enter value for begin_snap: 43984
Begin Snapshot Id specified: 43984
Enter value for end_snap: 43985
End Snapshot Id specified: 43985
Specify the Report Name
~~~~~~~~~~~~~~~~~~~~~~~
The default report file name is awrrpt_1_43984_43985.txt. To use this name,
press <return> to continue, otherwise enter an alternative.
Enter value for report_name:
Using the report name awrrpt_1_43984_43985.txt
WARNING (-20023)
ORA-20023: Missing start and end values for time model stat: parse time elapsed
WARNING (-20023)
ORA-20023: Missing start and end values for time model stat: DB CPU
WARNING (-20016)
ORA-20016: Missing value for SGASTAT: free memory
WARNING (-20016)
ORA-20016: Missing value for SGASTAT: free memory
WARNING (-20009)
ORA-20009: Missing System Statistic logons current
WARNING (-20009)
ORA-20009: Missing System Statistic logons current
WARNING (-20009)
ORA-20009: Missing System Statistic opened cursors current
WARNING (-20009)
ORA-20009: Missing System Statistic opened cursors current
WARNING (-20023)
ORA-20023: Missing start and end values for time model stat: sql execute elapsed
WARNING (-20008)
ORA-20008: Missing Init.ora parameter undo_management
WARNING (-20008)
ORA-20008: Missing Init.ora parameter db_block_size
WARNING (-20016)
ORA-20016: Missing value for SGASTAT: log_buffer
WARNING (-20023)
ORA-20023: Missing start and end values for time model stat: DB time
WARNING (-20008)
ORA-20008: Missing Init.ora parameter timed_statistics
WARNING (-20008)
ORA-20008: Missing Init.ora parameter timed_statistics
WARNING (-20008)
ORA-20008: Missing Init.ora parameter statistics_level
WARNING (-20008)
ORA-20008: Missing Init.ora parameter statistics_level
WARNING (-20008)
ORA-20008: Missing Init.ora parameter sga_target
WARNING (-20008)
ORA-20008: Missing Init.ora parameter pga_aggregate_target
WARNING (-20023)
ORA-20023: Missing start and end values for time model stat: background cpu time
WARNING (-20023)
ORA-20023: Missing start and end values for time model stat: background elapsed
WARNING (-20023)
ORA-20023: Missing start and end values for time model stat: connection manageme
WARNING (-20016)
ORA-20016: Missing value for SGASTAT: buffer_cache
WARNING (-20016)
ORA-20016: Missing value for SGASTAT: buffer_cache
WARNING: Since the DB Time is less than one second, there was
minimal foreground activity in the snapshot period.
Some of the percentage values will be invalid.
WORKLOAD REPOSITORY report for
DB Name DB Id Instance Inst Num Startup Time Release RAC
WEBTST 1391811405 webtst 1 29-Apr-11 04:50 11.1.0.7.0 NO
Host Name Platform CPUs Cores Sockets Memory(GB)
WEBDBTST Microsoft Windows x86 64-bit .00
Snap Id Snap Time Sessions Curs/Sess
Begin Snap: 43984 12-May-11 11:00:01
End Snap: 43985 12-May-11 11:02:00
Elapsed: 1.98 (mins)
DB Time: 0.00 (mins)
Cache Sizes Begin End
~~~~~~~~~~~ ---------- ----------
Buffer Cache:MM Std Block Size:K
Shared Pool Size: 0M 0M Log Buffer:K
ORA-01403: no data found
Error encountered in Report Summary
Continuing to Report Sections
Time Model Statistics DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Operating System Statistics DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Operating System Statistics - DetailDB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Foreground Wait Class DB/Inst: WEBTST/webtst Snaps: 43984-43985
-> s - second, ms - millisecond - 1000th of a second
-> ordered by wait time desc, waits desc
-> %Timeouts: value of 0 indicates value was < .5%. Value of null is truly 0
-> Captured Time accounts for % of Total DB time .00 (s)
-> Total FG Wait Time: (s) DB CPU time: .00 (s)
Avg
%Time Total Wait wait
Wait Class Waits -outs Time (s) (ms) %DB time
DB CPU 0 100.0
Foreground Wait Events DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Background Wait Events DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Wait Event Histogram DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Service Statistics DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Service Wait Class Stats DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
SQL ordered by Elapsed Time DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
SQL ordered by CPU Time DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
SQL ordered by Gets DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
SQL ordered by Reads DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
SQL ordered by Executions DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
SQL ordered by Parse Calls DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
SQL ordered by Sharable Memory DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
SQL ordered by Version Count DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Instance Activity Stats DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Instance Activity Stats - Absolute ValuesDB/Inst: WEBTST/webtst Snaps: 43984
No data exists for this section of the report.
Instance Activity Stats - Thread ActivityDB/Inst: WEBTST/webtst Snaps: 43984-
No data exists for this section of the report.
Tablespace IO Stats DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
File IO Stats DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Buffer Pool Statistics DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Instance Recovery Stats DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Buffer Pool Advisory DB/Inst: WEBTST/webtst Snap: 43985
No data exists for this section of the report.
PGA Aggr Summary DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
PGA Aggr Target Stats DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
PGA Aggr Target Histogram DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
PGA Memory Advisory DB/Inst: WEBTST/webtst Snap: 43985
No data exists for this section of the report.
Shared Pool Advisory DB/Inst: WEBTST/webtst Snap: 43985
No data exists for this section of the report.
SGA Target Advisory DB/Inst: WEBTST/webtst Snap: 43985
No data exists for this section of the report.
Streams Pool Advisory DB/Inst: WEBTST/webtst Snap: 43985
No data exists for this section of the report.
Java Pool Advisory DB/Inst: WEBTST/webtst Snap: 43985
No data exists for this section of the report.
Buffer Wait Statistics DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Enqueue Activity DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Undo Segment Summary DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Undo Segment Stats DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Latch Activity DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Latch Sleep Breakdown DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Latch Miss Sources DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Mutex Sleep Summary DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Parent Latch Statistics DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Child Latch Statistics DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Segments by Row Lock Waits DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Segments by ITL Waits DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Segments by Buffer Busy Waits DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Dictionary Cache Stats DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Library Cache Activity DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Memory Dynamic Components DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Memory Resize Operations Summary DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Memory Resize Ops DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Process Memory Summary DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
sum
SGA breakdown difference DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Streams CPU/IO Usage DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Streams Capture DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Streams Apply DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Buffered Queues DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Buffered Subscribers DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Rule Set DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Persistent Queues DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Persistent Subscribers DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
Resource Limit Stats DB/Inst: WEBTST/webtst Snap: 43985
No data exists for this section of the report.
init.ora Parameters DB/Inst: WEBTST/webtst Snaps: 43984-43985
No data exists for this section of the report.
End of ReportSQL> show parameter statistics
NAME TYPE VALUE
optimizer_use_pending_statistics boolean FALSE
statistics_level string TYPICAL
timed_os_statistics integer 0
timed_statistics boolean TRUE
SQL>
SQL> SELECT statistics_name,
2 session_status,
3 system_status,
4 activation_level,
5 session_settable
6 FROM v$statistics_level
7 ORDER BY statistics_name;
STATISTICS_NAME SESSION_ SYSTEM_S ACTIVAT SES
Active Session History ENABLED ENABLED TYPICAL NO
Adaptive Thresholds Enabled ENABLED ENABLED TYPICAL NO
Automated Maintenance Tasks ENABLED ENABLED TYPICAL NO
Bind Data Capture ENABLED ENABLED TYPICAL NO
Buffer Cache Advice ENABLED ENABLED TYPICAL NO
Global Cache Statistics ENABLED ENABLED TYPICAL NO
Longops Statistics ENABLED ENABLED TYPICAL NO
MTTR Advice DISABLED DISABLED TYPICAL NO
Modification Monitoring ENABLED ENABLED TYPICAL NO
PGA Advice ENABLED ENABLED TYPICAL NO
Plan Execution Sampling ENABLED ENABLED TYPICAL YES
Plan Execution Statistics DISABLED DISABLED ALL YES
SQL Monitoring ENABLED ENABLED TYPICAL YES
Segment Level Statistics ENABLED ENABLED TYPICAL NO
Shared Pool Advice ENABLED ENABLED TYPICAL NO
Streams Pool Advice ENABLED ENABLED TYPICAL NO
Threshold-based Alerts ENABLED ENABLED TYPICAL NO
Time Model Events ENABLED ENABLED TYPICAL YES
Timed OS Statistics DISABLED DISABLED ALL YES
Timed Statistics ENABLED ENABLED TYPICAL YES
Ultrafast Latch Statistics ENABLED ENABLED TYPICAL NO
Undo Advisor, Alerts and Fast Ramp up ENABLED ENABLED TYPICAL NO
V$IOSTAT_* statistics ENABLED ENABLED TYPICAL NO
23 rows selected.
SQL>Thanks
Edited by: rsar001 on May 12, 2011 11:33 AM -
Blank awr report shown in oracle standars edition 11g (11.2.0.1.0)
Hi, friends ..
I am using Oracle 11g standars edition(11.2.0.1.0) on solaris 10 platform.I do have a very strange probleem..when iam trying to capture awr report i am getting a blank
awr report contain ing nothing...like below section
---------------------------------------------------------------------------->
WARNING: Since the DB Time is less than one second, there was minimal foreground activity in the snapshot period. Some of the percentage values will be invalid.
WORKLOAD REPOSITORY report for
DB Name DB Id Instance Inst num Startup Time Release RAC
DISDB 771054785 disdb 1 30-Dec-10 10:12 11.2.0.1.0 NO
Host Name Platform CPUs Cores Sockets Memory (GB)
dissemination-new Solaris Operating System (x86-64) .00
Snap Id Snap Time Sessions Cursors/Session
Begin Snap: 1 30-Dec-10 11:30:21
End Snap: 2 30-Dec-10 12:30:52
Elapsed: 60.51 (mins)
DB Time: 0.00 (mins)
Report Summary
Cache Sizes
Begin End
Buffer Cache: M M Std Block Size: K
Shared Pool Size: 0M 0M Log Buffer: K
Load Profile
Per Second Per Transaction Per Exec Per Call
DB Time(s): 0.0 0.0 0.00 0.00
DB CPU(s): 0.0 0.0 0.00 0.00
Redo size:
Logical reads: 0.0 1.0
Block changes: 0.0 1.0
Physical reads: 0.0 1.0
Physical writes: 0.0 1.0
User calls: 0.0 1.0
Parses: 0.0 1.0
Hard parses:
W/A MB processed: 0.0 0.0
Logons:
Executes: 0.0 1.0
Rollbacks:
Transactions: 0.0
Instance Efficiency Percentages (Target 100%)
Buffer Nowait %: Redo NoWait %:
Buffer Hit %: In-memory Sort %:
Library Hit %: Soft Parse %:
Execute to Parse %: 0.00 Latch Hit %:
Parse CPU to Parse Elapsd %: % Non-Parse CPU:
Shared Pool Statisitics Not Available
Top 5 Timed Foreground Events
Event Waits Time(s) Avg wait (ms) % DB time Wait Class
DB CPU 0 100.00
Host CPU (CPUs: Cores: Sockets: )
Load Average Begin Load Average End %User %System %WIO %Idle
Instance CPU
%Total CPU %Busy CPU %DB time waiting for CPU (Resource Manager)
Memory Statistics
Begin End
Host Mem (MB):
SGA use (MB):
PGA use (MB):
% Host Mem used for SGA+PGA:
Main Report
Report Summary
Wait Events Statistics
SQL Statistics
Instance Activity Statistics
IO Stats
Buffer Pool Statistics
Advisory Statistics
Wait Statistics
Undo Statistics
Latch Statistics
Segment Statistics
Dictionary Cache Statistics
Library Cache Statistics
Memory Statistics
Streams Statistics
Resource Limit Statistics
Shared Server Statistics
init.ora Parameters
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Wait Events Statistics
Time Model Statistics
Operating System Statistics
Operating System Statistics - Detail
Foreground Wait Class
Foreground Wait Events
Background Wait Events
Wait Event Histogram
Wait Event Histogram Detail (64 msec to 2 sec)
Wait Event Histogram Detail (4 sec to 2 min)
Wait Event Histogram Detail (4 min to 1 hr)
Service Statistics
Service Wait Class Stats
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Time Model Statistics
No data exists for this section of the report.
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Operating System Statistics
No data exists for this section of the report.
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Operating System Statistics - Detail
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Foreground Wait Class
s - second, ms - millisecond - 1000th of a second
ordered by wait time desc, waits desc
%Timeouts: value of 0 indicates value was < .5%. Value of null is truly 0
Captured Time accounts for % of Total DB time .00 (s)
Total FG Wait Time: (s) DB CPU time: .00 (s)
Wait Class Waits %Time -outs Total Wait Time (s) Avg wait (ms) %DB time
DB CPU 0 100.00
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Foreground Wait Events
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Background Wait Events
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Wait Event Histogram
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Wait Event Histogram Detail (64 msec to 2 sec)
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Wait Event Histogram Detail (4 sec to 2 min)
No data exists for this section of the report.
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Wait Event Histogram Detail (4 min to 1 hr)
No data exists for this section of the report.
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Service Statistics
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Service Wait Class Stats
No data exists for this section of the report.
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SQL Statistics
SQL ordered by Elapsed Time
SQL ordered by CPU Time
SQL ordered by User I/O Wait Time
SQL ordered by Gets
SQL ordered by Reads
SQL ordered by Physical Reads (UnOptimized)
SQL ordered by Executions
SQL ordered by Parse Calls
SQL ordered by Sharable Memory
SQL ordered by Version Count
Complete List of SQL Text
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SQL ordered by Elapsed Time
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SQL ordered by CPU Time
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SQL ordered by User I/O Wait Time
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SQL ordered by Gets
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SQL ordered by Reads
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SQL ordered by Physical Reads (UnOptimized)
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SQL ordered by Executions
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SQL ordered by Parse Calls
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SQL ordered by Sharable Memory
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SQL ordered by Version Count
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Complete List of SQL Text
No data exists for this section of the report.
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Instance Activity Statistics
Instance Activity Stats
Instance Activity Stats - Absolute Values
Instance Activity Stats - Thread Activity
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Instance Activity Stats
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Instance Activity Stats - Absolute Values
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Instance Activity Stats - Thread Activity
No data exists for this section of the report.
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IO Stats
IOStat by Function summary
IOStat by Filetype summary
IOStat by Function/Filetype summary
Tablespace IO Stats
File IO Stats
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IOStat by Function summary
No data exists for this section of the report.
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IOStat by Filetype summary
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IOStat by Function/Filetype summary
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Tablespace IO Stats
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File IO Stats
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Buffer Pool Statistics
Buffer Pool Statistics
Checkpoint Activity
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Buffer Pool Statistics
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Checkpoint Activity
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Advisory Statistics
Instance Recovery Stats
MTTR Advisory
Buffer Pool Advisory
PGA Aggr Summary
PGA Aggr Target Stats
PGA Aggr Target Histogram
PGA Memory Advisory
Shared Pool Advisory
SGA Target Advisory
Streams Pool Advisory
Java Pool Advisory
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Instance Recovery Stats
No data exists for this section of the report.
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MTTR Advisory
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Buffer Pool Advisory
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PGA Aggr Summary
No data exists for this section of the report.
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PGA Aggr Target Stats
No data exists for this section of the report.
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PGA Aggr Target Histogram
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PGA Memory Advisory
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Shared Pool Advisory
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SGA Target Advisory
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Streams Pool Advisory
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Java Pool Advisory
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Wait Statistics
Buffer Wait Statistics
Enqueue Activity
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Buffer Wait Statistics
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Enqueue Activity
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Undo Statistics
Undo Segment Summary
Undo Segment Stats
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Undo Segment Summary
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Undo Segment Stats
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Latch Statistics
Latch Activity
Latch Sleep Breakdown
Latch Miss Sources
Mutex Sleep Summary
Parent Latch Statistics
Child Latch Statistics
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Latch Activity
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Latch Sleep Breakdown
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Latch Miss Sources
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Mutex Sleep Summary
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Parent Latch Statistics
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Child Latch Statistics
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Segment Statistics
Segments by Logical Reads
Segments by Physical Reads
Segments by Physical Read Requests
Segments by UnOptimized Reads
Segments by Optimized Reads
Segments by Direct Physical Reads
Segments by Physical Writes
Segments by Physical Write Requests
Segments by Direct Physical Writes
Segments by Table Scans
Segments by DB Blocks Changes
Segments by Row Lock Waits
Segments by ITL Waits
Segments by Buffer Busy Waits
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Segments by Logical Reads
Total Logical Reads: 1
Captured Segments account for 4.6E+06% of Total
Owner Tablespace Name Object Name Subobject Name Obj. Type Logical Reads %Total
SYS SYSTEM I_SYSAUTH1 INDEX 15,008 1500800.00
SYS SYSTEM I_OBJ2 INDEX 4,752 475200.00
SYS SYSTEM TAB$ TABLE 2,176 217600.00
SYS SYSTEM I_JOB_NEXT INDEX 1,856 185600.00
SYS SYSTEM SYS_C00646 INDEX 1,664 166400.00
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Segments by Physical Reads
Total Physical Reads: 1
Captured Segments account for 400.0% of Total
Owner Tablespace Name Object Name Subobject Name Obj. Type Physical Reads %Total
SYS SYSAUX WRH$_SYSMETRIC_SUMMARY_INDEX INDEX 3 300.00
SYS SYSTEM KOTAD$ TABLE 1 100.00
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Segments by Physical Read Requests
Total Physical Read Requests: 1
Captured Segments account for 400.0% of Total
Owner Tablespace Name Object Name Subobject Name Obj. Type Phys Read Requests %Total
SYS SYSAUX WRH$_SYSMETRIC_SUMMARY_INDEX INDEX 3 300.00
SYS SYSTEM KOTAD$ TABLE 1 100.00
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Segments by UnOptimized Reads
Total UnOptimized Read Requests: 1
Captured Segments account for 400.0% of Total
Owner Tablespace Name Object Name Subobject Name Obj. Type UnOptimized Reads %Total
SYS SYSAUX WRH$_SYSMETRIC_SUMMARY_INDEX INDEX 3 300.00
SYS SYSTEM KOTAD$ TABLE 1 100.00
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Segments by Optimized Reads
No data exists for this section of the report.
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Segments by Direct Physical Reads
No data exists for this section of the report.
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Segments by Physical Writes
Total Physical Writes: 1
Captured Segments account for 1.1E+04% of Total
Owner Tablespace Name Object Name Subobject Name Obj. Type Physical Writes %Total
SYSMAN SYSAUX MGMT_METRICS_RAW_PK INDEX 27 2700.00
SYS SYSAUX WRH$_SYSMETRIC_HISTORY TABLE 16 1600.00
SYS SYSAUX WRH$_SYSMETRIC_HISTORY_INDEX INDEX 16 1600.00
SYSMAN SYSAUX MGMT_SYSTEM_PERF_LOG_IDX_01 INDEX 9 900.00
SYS SYSAUX SMON_SCN_TIME TABLE 9 900.00
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Segments by Physical Write Requests
Total Physical Write Requestss: 1
Captured Segments account for 5.1E+03% of Total
Owner Tablespace Name Object Name Subobject Name Obj. Type Phys Write Requests %Total
SYSMAN SYSAUX MGMT_METRICS_RAW_PK INDEX 11 1100.00
SYS SYSAUX SMON_SCN_TIME TABLE 9 900.00
SYSMAN SYSAUX MGMT_SYSTEM_PERF_LOG_IDX_01 INDEX 6 600.00
SYSMAN SYSAUX MGMT_CURRENT_METRICS_PK INDEX 4 400.00
SYS SYSTEM I_JOB_NEXT INDEX 2 200.00
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Segments by Direct Physical Writes
No data exists for this section of the report.
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Segments by Table Scans
Total Table Scans: 1
Captured Segments account for 900.0% of Total
Owner Tablespace Name Object Name Subobject Name Obj. Type Table Scans %Total
SYS SYSTEM I_OBJ2 INDEX 9 900.00
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Segments by DB Blocks Changes
% of Capture shows % of DB Block Changes for each top segment compared
with total DB Block Changes for all segments captured by the Snapshot
Owner Tablespace Name Object Name Subobject Name Obj. Type DB Block Changes % of Capture
SYS SYSTEM I_JOB_NEXT INDEX 896 58.95
SYSMAN SYSAUX MGMT_METRICS_RAW_PK INDEX 160 10.53
SYSMAN SYSAUX MGMT_CURRENT_METRICS_PK INDEX 112 7.37
SYS SYSAUX SMON_SCN_TIME TABLE 80 5.26
SYSMAN SYSAUX MGMT_SYSTEM_PERF_LOG_IDX_01 INDEX 64 4.21
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Segments by Row Lock Waits
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Segments by ITL Waits
No data exists for this section of the report.
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Segments by Buffer Busy Waits
No data exists for this section of the report.
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Dictionary Cache Stats
No data exists for this section of the report.
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Library Cache Activity
No data exists for this section of the report.
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Memory Statistics
Memory Dynamic Components
Memory Resize Operations Summary
Memory Resize Ops
Process Memory Summary
SGA Memory Summary
SGA breakdown difference
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Memory Dynamic Components
No data exists for this section of the report.
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Memory Resize Operations Summary
No data exists for this section of the report.
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Memory Resize Ops
No data exists for this section of the report.
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Process Memory Summary
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SGA breakdown difference
No data exists for this section of the report.
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Streams Statistics
Streams CPU/IO Usage
Streams Capture
Streams Capture Rate
Streams Apply
Streams Apply Rate
Buffered Queues
Buffered Queue Subscribers
Rule Set
Persistent Queues
Persistent Queues Rate
Persistent Queue Subscribers
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Streams CPU/IO Usage
No data exists for this section of the report.
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Streams Capture
No data exists for this section of the report.
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Streams Capture Rate
No data exists for this section of the report.
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Streams Apply
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Streams Apply Rate
No data exists for this section of the report.
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Buffered Queues
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Buffered Queue Subscribers
No data exists for this section of the report.
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Rule Set
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Persistent Queues
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Persistent Queues Rate
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Persistent Queue Subscribers
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Resource Limit Stats
No data exists for this section of the report.
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Shared Server Statistics
Shared Servers Activity
Shared Servers Rates
Shared Servers Utilization
Shared Servers Common Queue
Shared Servers Dispatchers
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Shared Servers Activity
No data exists for this section of the report.
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Shared Servers Rates
No data exists for this section of the report.
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Shared Servers Utilization
No data exists for this section of the report.
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Shared Servers Common Queue
No data exists for this section of the report.
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Shared Servers Dispatchers
No data exists for this section of the report.
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init.ora Parameters
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Dynamic Remastering Stats
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End of Report
---------------------------------------------->>
here intresting is that i also can't have the memory section view also.i trien to clear awr repositary and recreate it..bounce database,also tried taking different snap value.But does notmake any change.can u tell me why tha happening..and how can i get a good awr report.Hi there,
I have covered this in my blog entry on the subject. Check that link out for more licensing information and other resources.
The problem you are experiencing is caused by the fact that AWR is part of the DIAGNOSTIC and TUNING packs of Oracle 11g, which as of 11g is no longer a standard feature of the database but rather an optional extra which must be licensed in addition to your default Oracle Standard Edition package. In terms of the licensing, you just need to license it as an optional extra so that you will actually be using it legally, and then you can go ahead and enable it.
While it may be an additional licensed item, it is actually installed on your DB by default, but is just not enabled. So, once you have cleared the licensing issue, you will be free to enable diagnostics by setting the new database parameter, CONTROL_MANAGEMENT_PACK_ACCESS. You can do this by running the following as a dba:
<pre>alter system set control_management_pack_access="DIAGNOSTIC+TUNING" scope=both;</pre>
After running this command, your database will start accumulating diagnostic information. Note that you will need to wait until new snapshots are created in which the new diagnostic information will be available. I found that although most of the information became available after setting CONTROL_MANAGEMENT_PACK_ACCESS, it was only once the database was restarted that all of the information became available. I have seen many people reporting similar behavior.
Old snapshots will obviously continue to give the errors because they did not have the diagnostic information available at the time. -
DB version:10gR2
After looking at Top 5 wait events and SQL statistics, what is the next most important thing i should be looking for in an AWR report?This would depend on the top events that you have seen. For example, if you have seen that in the top 5 wait events, there was very high DB File Scattered Read , it means that there are statements which are predominantly going for full table access. So you should look upon for those queries. Or if there is a high Latch Contetion, for example, Shared Pool Latch Conteions ,it means that there are lots of sttement which are going for hard parse and are contending for this latch. So you should look for those sql which are having more cnstants and are not using bind varaibles.
So its not a standard way but it is depending on what you see. Over Jonathan Lewis's blog, there is an excellent series of how to read Statspack report. I shall suggest to read it. This would make a good base to go through with AWR report also.
HTH
Aman.... -
Hello,
Just to start off on the right path I would like you to know that I am a Java developer trying to understand the AWR report. To give a quick overview of my problem :
I have built a load test framework using JMeter and trying to send SOAP requests to my weblogic server. Each of these requests are getting converted multiple Insert, Update and Merge statements and getting executed on the Oracle 10g productions grade DB server. When I run the AWR report, under the "SQL ordered by Executions (Global)" I see statements that have run for 2 billion times. The JDBC connection to the database is configured to have a maximum of 40 connections and I do not see all of them being used up. The issue now is I am NOT generating that kind of load yet. I am creating around 15000 SOAP requests in an hour and I am expecting around 1million records to hit the database. The test runs fine for a couple of hours and then the server starts failing because the database is not responding back properly. When I run the statistics query on tables "gv$session s, gv$sqlarea t, gv$process p" to get the pending sessions in the database I have seen anywhere between 30 - 62 pending sessions with a activity time of more than 300 minutes.
I am sure I am not sending in 2 billion requests from the LoadTest env that I have developed but the AWR report says so. I want to know if there is a possible reason for this behavior. The stuck threads start occurring on the Weblogic server after 30 mins I start the test. Below is the exception I got on weblogic just in case it helps
2014-10-06 19:26:04,960[[STUCK] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)']ERROR DAOUtil -- DAOUtil@SQLException > weblogic.jdbc.extensions.ConnectionDeadSQLException: weblogic.common.resourcepool.ResourceDeadException: Could not create pool connection. The DBMS driver exception was: Closed Connection
at weblogic.jdbc.common.internal.JDBCUtil.wrapAndThrowResourceException(JDBCUtil.java:249)
at weblogic.jdbc.pool.Driver.connect(Driver.java:160)
at weblogic.jdbc.jts.Driver.getNonTxConnection(Driver.java:642)
at weblogic.jdbc.jts.Driver.connect(Driver.java:124)
at weblogic.jdbc.common.internal.RmiDataSource.getConnection(RmiDataSource.java:338)
at com.bci.rms.ea.common.eautil.dao.DAOUtil.getConnectionFromDataSource(DAOUtil.java:222)
Looking forward for reply/questions...
Thanks in Advance,
Sameer.Hello,
Just to start off on the right path I would like you to know that I am a Java developer trying to understand the AWR report. To give a quick overview of my problem :
I have built a load test framework using JMeter and trying to send SOAP requests to my weblogic server. Each of these requests are getting converted multiple Insert, Update and Merge statements and getting executed on the Oracle 10g productions grade DB server. When I run the AWR report, under the "SQL ordered by Executions (Global)" I see statements that have run for 2 billion times. The JDBC connection to the database is configured to have a maximum of 40 connections and I do not see all of them being used up. The issue now is I am NOT generating that kind of load yet. I am creating around 15000 SOAP requests in an hour and I am expecting around 1million records to hit the database. The test runs fine for a couple of hours and then the server starts failing because the database is not responding back properly. When I run the statistics query on tables "gv$session s, gv$sqlarea t, gv$process p" to get the pending sessions in the database I have seen anywhere between 30 - 62 pending sessions with a activity time of more than 300 minutes.
I am sure I am not sending in 2 billion requests from the LoadTest env that I have developed but the AWR report says so. I want to know if there is a possible reason for this behavior. The stuck threads start occurring on the Weblogic server after 30 mins I start the test. Below is the exception I got on weblogic just in case it helps
2014-10-06 19:26:04,960[[STUCK] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)']ERROR DAOUtil -- DAOUtil@SQLException > weblogic.jdbc.extensions.ConnectionDeadSQLException: weblogic.common.resourcepool.ResourceDeadException: Could not create pool connection. The DBMS driver exception was: Closed Connection
at weblogic.jdbc.common.internal.JDBCUtil.wrapAndThrowResourceException(JDBCUtil.java:249)
at weblogic.jdbc.pool.Driver.connect(Driver.java:160)
at weblogic.jdbc.jts.Driver.getNonTxConnection(Driver.java:642)
at weblogic.jdbc.jts.Driver.connect(Driver.java:124)
at weblogic.jdbc.common.internal.RmiDataSource.getConnection(RmiDataSource.java:338)
at com.bci.rms.ea.common.eautil.dao.DAOUtil.getConnectionFromDataSource(DAOUtil.java:222)
Looking forward for reply/questions...
Thanks in Advance,
Sameer. -
Contention for latches related to the shared pool was consuming significant
We are having performance issue on our database. When I look at the AWR, I see that there is a contention for latches. Below is the AWR Report.
ADDM Report for Task 'ADDM:1775307360_12808'
Analysis Period
AWR snapshot range from 12807 to 12808.
Time period starts at 10-MAY-11 01.00.15 PM
Time period ends at 10-MAY-11 02.00.23 PM
Analysis Target
Database 'ADVFDWP' with DB ID 1775307360.
Database version 11.1.0.7.0.
ADDM performed an analysis of all instances.
Activity During the Analysis Period
Total database time was 27827 seconds.
The average number of active sessions was 7.71.
Summary of Findings
Description Active Sessions Recommendations
Percent of Activity
1 Shared Pool Latches 6.43 | 83.42 0
2 Top SQL by DB Time 2.41 | 31.24 3
3 "Concurrency" Wait Class 2.18 | 28.22 0
4 PL/SQL Execution 1.53 | 19.86 1
5 "User I/O" wait Class 1.33 | 17.24 0
6 Hard Parse 1.24 | 16.14 0
7 Undersized Buffer Cache .83 | 10.73 0
8 CPU Usage .7 | 9.02 0
9 Top SQL By I/O .31 | 4.04 1
10 Top Segments by I/O .24 | 3.12 1
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Findings and Recommendations
Finding 1: Shared Pool Latches
Impact is 6.43 active sessions, 83.42% of total activity.
Contention for latches related to the shared pool was consuming significant
database time in some instances.
Instances that were significantly affected by this finding:
Number Name Percent Impact ADDM Task Name
1 ADVFDWP1 99.31 ADDM:1775307360_1_12808
Check the ADDM analysis of affected instances for recommendations.
Finding 2: Top SQL by DB Time
Impact is 2.41 active sessions, 31.24% of total activity.
SQL statements consuming significant database time were found.
Recommendation 1: SQL Tuning
Estimated benefit is 1.07 active sessions, 13.82% of total activity.
Action
Run SQL Tuning Advisor on the SQL statement with SQL_ID "fdk73nhpt93a5".
Related Object
SQL statement with SQL_ID fdk73nhpt93a5.
INSERT INTO SFCDM.F_LOAN_PTFL_MOL_SNPSHT SELECT * FROM
F_LOAN_PTFL_MOL_SNPSHT_STG
Recommendation 2: SQL Tuning
Estimated benefit is 1 active sessions, 12.96% of total activity.
Action
Tune the PL/SQL block with SQL_ID "7nvgzsgy9ydn9". Refer to the "Tuning
PL/SQL Applications" chapter of Oracle's "PL/SQL User's Guide and
Reference".
Related Object
SQL statement with SQL_ID 7nvgzsgy9ydn9.
begin
insert into SFCDM.F_LOAN_PTFL_MOL_SNPSHT select * from
F_LOAN_PTFL_MOL_SNPSHT_STG;
end;
Recommendation 3: SQL Tuning
Estimated benefit is .4 active sessions, 5.2% of total activity.
Action
Investigate the SQL statement with SQL_ID "fcvfq2gzmxu0t" for possible
performance improvements.
Related Object
SQL statement with SQL_ID fcvfq2gzmxu0t.
select
a11.DT_YR_MO DT_YR_MO,
a11.IND_SCRTZD IND_SCRTZD,
a13.CD_LNSTAT CD_LNSTAT_INTGRTD,
sum(a11.CNT_LOAN) WJXBFS1,
sum(a11.AMT_PART_EOP_UPB) WJXBFS2,
sum(a11.AMT_LST_VLD_PART_UPB) WJXBFS3
from
SFCDM.F_LOAN_PTFL_MOL_SNPSHT
a11
join
SFCDM.D_DETD_LNSTAT_CURR
a12
on
(a11.ID_CYCL_CLOS_DETD_LNSTAT_SRGT = a12.ID_DETD_LNSTAT_SRGT)
join
SFCDM.D_LNSTAT_CD
a13
on
(a12.ID_LNSTAT_CD_SRGT = a13.ID_LNSTAT_CD_SRGT)
join
SFCDM.D_LOAN_CHARTC_CURR_MINI
a14
on
(a11.ID_LOAN_CHARTC_SRGT = a14.ID_LOAN_CHARTC_SRGT)
where
(a11.DT_YR_MO in (201103)
and a14.CD_SFCRM_LOAN_BUS_LI not in ('L', 'T', 'W')
and a13.CD_LNSTAT in (14)
and not exists
(select * from SFCDM.F_LOAN_PTFL_MOL_SNPSHT s
where s.id_loan_syst_gend = a11.id_loan_syst_gend
and s.dt_yr_moIt is worth checking the actual size of the shared pool e.g.
select pool,sum(bytes)/1024/1024/1024 from v$sgastat group by pool;
the parameters you ahve posted suggest you have set a minimum but no maximum, so it could very large.
Next up is looking for unhared SQL i.e.
select column1 from some_table where column2='A_VALUE';
select column1 from some_table where column2='Another_Value';
where the code should be using binds instead of literals for security and performance reasons, a simple way to find this is to look in v$sql for sql having the same plan_hash_value but different sql_Ids and compare the sql_fulltext of each statement.
Also a possibility is sql with many child cursors, this is trickier as the cause may vary and may not be easy to fix. check th econtents of v$sql for sql that have high values in the child_number column anmd investigate the contents of v$sql_shared_cursor for the reason there are multiple child cursors.
Chris -
Total of %db time column is greater than 100 in AWR report
Hello,
I have a query regarding "To 5 timed foreground events" section of AWR report.
On many occassions I found that the sum of all the values in the %db time column as mentioned above is grater than 100.
How can percentage be greater than 100?
Event
Waits
Time(s)
Avg wait (ms)
% DB time
Wait Class
DB CPU
29,212
98.18
latch: shared pool
2,291
286
125
0.96
Concurrency
direct path read
147,998
112
1
0.38
User I/O
library cache: mutex X
4,831
92
19
0.31
Concurrency
log file sync
36,736
72
2
0.24
Commit
In the above case the total comes up to just 100.07 % but I have seen reports where the total goes beyond 120 % -130 %.
Can you explain why this happens, please?
Thanks,
RushiCan someone explain above situation, please?
-
Hi!
So, how should I increase it now? I couldn't follow.
Could someone guide?
Warning: pga_aggregate_target was set too low for current workload, as this
value was exceeded during this interval. Use the PGA Advisory view
to help identify a different value for pga_aggregate_target.
PGA Aggr Target Stats DB/Inst: test/test Snaps: 6220-6221
-> B: Begin snap E: End snap (rows dentified with B or E contain data
which is absolute i.e. not diffed over the interval)
-> Auto PGA Target - actual workarea memory target
-> W/A PGA Used - amount of memory used for all Workareas (manual + auto)
-> %PGA W/A Mem - percentage of PGA memory allocated to workareas
-> %Auto W/A Mem - percentage of workarea memory controlled by Auto Mem Mgmt
-> %Man W/A Mem - percentage of workarea memory under manual control
%PGA %Auto %Man
PGA Aggr Auto PGA PGA Mem W/A PGA W/A W/A W/A Global Mem
Target(M) Target(M) Alloc(M) Used(M) Mem Mem Mem Bound(K)
B 54 4 80.3 0.0 .0 .0 .0 4,096
E 54 4 80.5 0.3 .4 100.0 .0 2,113
-------------------------------------------------------------Thanks a ton in advance.Thanks
I did that but still no improvement in the performance
I noticed this on the screen after running the awr report
SGA breakdown difference DB/Inst: Test/test Snaps: 6221-6222
-> ordered by Pool, Name
-> N/A value for Begin MB or End MB indicates the size of that Pool/Name was
insignificant, or zero in that snapshot
Pool Name Begin MB End MB % Diff
java free memory 24.0 24.0 0.00
shared ASH buffers 8.0 8.0 0.00
shared CCursor 14.7 14.0 -5.18
shared Heap0: KGL 4.2 3.6 -12.21
shared KCB Table Scan Buffer 3.8 3.8 0.00
shared KGLS heap 9.8 7.4 -24.41
shared KQR M PO 2.9 2.2 -25.67
shared KSFD SGA I/O b 3.8 3.8 0.00
shared PCursor 5.5 5.1 -7.07
shared PL/SQL MPCODE 4.2 4.9 16.34
shared free memory 16.8 21.5 27.41
shared library cache 8.5 8.4 -0.65
shared row cache 3.6 3.6 0.00
shared sql area 75.0 75.9 1.17
shared sql area:PLSQL 2.9 2.9 -0.67
buffer_cache 48.0 48.0 0.00
fixed_sga 1.2 1.2 0.00
log_buffer 2.8 2.8 0.00Does the negative values show something which is not right?
Please advice
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