WARNING - Last redo log file switch interval was 6 minutes. Next interval p
Hello!
I just started monitoring my Oracle via ConSol Nagios script.
Now it show`s a Warning because:
WARNING - Last redo log file switch interval was 6 minutes. Next interval presumably >2 minutes. Second incident in a row.
As I do not know much about Oracle I do not understand that message.
a) What does it mean ?
b) Is it really critical ?
Thanks!
>
I just started monitoring my Oracle via ConSol Nagios script.
Now it show`s a Warning because:
WARNING - Last redo log file switch interval was 6 minutes. Next interval presumably >2 minutes. Second incident in a row.
As I do not know much about Oracle I do not understand that message.
a) What does it mean ?
b) Is it really critical ?
>
First of all: This is not an Oracle Error message. Instead, you have a somewhat arbitrarily threshold set in your non-Oracle monitoring tool. If this happens only once in a while - ignore it or modify the threshold.
Generally, frequent fast logswitches can be the cause of performance problems.
If you have Oracle Enterprise Manager in place and Diagnostic Pack licensed, it would give you a much more qualified statement about your Database performance. Also a recommendation to increase the Logfile size in case.
If you look for a procedure to increase the size of your logfiles:
http://uhesse.wordpress.com/2010/01/20/how-to-change-the-size-of-online-redologs/
Kind regards
Uwe Hesse
http://uhesse.wordpress.com
Similar Messages
-
Bottleneck when switching the redo log files.
Hello All,
I am using Oracle 11.2.0.3.
The application team reported that they are facing slowness at certain time.
I monitored the database and I found that at some switching of the redo log files (not always) I am facing a slowness at the application level.
I have 2 threads since my database is RAC, each thread have 3 redo log groups multiplexed to the FRA, with size 300 MB each.
Is there any way to optimize the switch of redo log files? knowing that my database is running in ARCHIVELOG mode.
Regards,Hello Nikolay,
Thanks for your input I am sharing with you the below information. I have 2 instances so I will provide the info from each instance
Instance 1:
Load Profile Per Second Per Transaction Per Exec Per Call
~~~~~~~~~~~~ --------------- --------------- ---------- ----------
DB Time(s): 4.9 0.0 0.00 0.00
DB CPU(s): 1.1 0.0 0.00 0.00
Redo size: 3,014,876.2 3,660.4
Logical reads: 32,619.3 39.6
Block changes: 7,969.0 9.7
Physical reads: 0.2 0.0
Physical writes: 164.0 0.2
User calls: 7,955.4 9.7
Parses: 288.9 0.4
Hard parses: 96.0 0.1
W/A MB processed: 0.2 0.0
Logons: 0.9 0.0
Executes: 2,909.4 3.5
Rollbacks: 0.0 0.0
Instance 2:
Load Profile Per Second Per Transaction Per Exec Per Call
~~~~~~~~~~~~ --------------- --------------- ---------- ----------
DB Time(s): 5.5 0.0 0.00 0.00
DB CPU(s): 1.4 0.0 0.00 0.00
Redo size: 3,527,737.9 3,705.7
Logical reads: 29,916.5 31.4
Block changes: 8,893.7 9.3
Physical reads: 0.2 0.0
Physical writes: 194.0 0.2
User calls: 7,742.8 8.1
Parses: 262.7 0.3
Hard parses: 99.5 0.1
W/A MB processed: 0.4 0.0
Logons: 1.0 0.0
Executes: 2,822.5 3.0
Rollbacks: 0.0 0.0
Transactions: 952.0
Instance 1:
Top 5 Timed Foreground Events
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Avg
wait % DB
Event Waits Time(s) (ms) time Wait Class
DB CPU 1,043 21.5
log file sync 815,334 915 1 18.9 Commit
gc buffer busy acquire 323,759 600 2 12.4 Cluster
gc current block busy 215,132 585 3 12.1 Cluster
enq: TX - row lock contention 23,284 264 11 5.5 Applicatio
Instance 2:
Top 5 Timed Foreground Events
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Avg
wait % DB
Event Waits Time(s) (ms) time Wait Class
DB CPU 1,340 24.9
log file sync 942,962 1,125 1 20.9 Commit
gc buffer busy acquire 377,812 594 2 11.0 Cluster
gc current block busy 211,270 488 2 9.1 Cluster
enq: TX - row lock contention 30,094 299 10 5.5 Applicatio
Instance 1:
Operating System Statistics Snaps: 1016-1017
-> *TIME statistic values are diffed.
All others display actual values. End Value is displayed if different
-> ordered by statistic type (CPU Use, Virtual Memory, Hardware Config), Name
Statistic Value End Value
AVG_BUSY_TIME 17,451
AVG_IDLE_TIME 81,268
AVG_IOWAIT_TIME 1
AVG_SYS_TIME 6,854
AVG_USER_TIME 10,548
BUSY_TIME 420,031
IDLE_TIME 1,951,741
IOWAIT_TIME 288
SYS_TIME 165,709
USER_TIME 254,322
LOAD 3 6
OS_CPU_WAIT_TIME 523,000
RSRC_MGR_CPU_WAIT_TIME 0
VM_IN_BYTES 311,280
VM_OUT_BYTES 75,862,008
PHYSICAL_MEMORY_BYTES 62,813,896,704
NUM_CPUS 24
NUM_CPU_CORES 6
NUM_LCPUS 24
NUM_VCPUS 6
GLOBAL_RECEIVE_SIZE_MAX 4,194,304
GLOBAL_SEND_SIZE_MAX 4,194,304
TCP_RECEIVE_SIZE_DEFAULT 16,384
TCP_RECEIVE_SIZE_MAX 9.2233720368547758E+18
TCP_RECEIVE_SIZE_MIN 4,096
TCP_SEND_SIZE_DEFAULT 16,384
TCP_SEND_SIZE_MAX 9.2233720368547758E+18
TCP_SEND_SIZE_MIN 4,096
Operating System Statistics - Detail Snaps: 1016-101
Snap Time Load %busy %user %sys %idle %iowait
22-Aug 11:33:55 2.7 N/A N/A N/A N/A N/A
22-Aug 11:50:23 6.2 17.7 10.7 7.0 82.3 0.0
Instance 2:
Operating System Statistics Snaps: 1016-1017
-> *TIME statistic values are diffed.
All others display actual values. End Value is displayed if different
-> ordered by statistic type (CPU Use, Virtual Memory, Hardware Config), Name
Statistic Value End Value
AVG_BUSY_TIME 11,823
AVG_IDLE_TIME 86,923
AVG_IOWAIT_TIME 0
AVG_SYS_TIME 4,791
AVG_USER_TIME 6,991
BUSY_TIME 475,210
IDLE_TIME 3,479,382
IOWAIT_TIME 410
SYS_TIME 193,602
USER_TIME 281,608
LOAD 3 6
OS_CPU_WAIT_TIME 615,400
RSRC_MGR_CPU_WAIT_TIME 0
VM_IN_BYTES 16,360
VM_OUT_BYTES 72,699,920
PHYSICAL_MEMORY_BYTES 62,813,896,704
NUM_CPUS 40
NUM_CPU_CORES 10
NUM_LCPUS 40
NUM_VCPUS 10
GLOBAL_RECEIVE_SIZE_MAX 4,194,304
GLOBAL_SEND_SIZE_MAX 4,194,304
TCP_RECEIVE_SIZE_DEFAULT 16,384
TCP_RECEIVE_SIZE_MAX 9.2233720368547758E+18
TCP_RECEIVE_SIZE_MIN 4,096
TCP_SEND_SIZE_DEFAULT 16,384
TCP_SEND_SIZE_MAX 9.2233720368547758E+18
TCP_SEND_SIZE_MIN 4,096
Operating System Statistics - Detail Snaps: 1016-101
Snap Time Load %busy %user %sys %idle %iowait
22-Aug 11:33:55 2.6 N/A N/A N/A N/A N/A
22-Aug 11:50:23 5.6 12.0 7.1 4.9 88.0 0.0
------------------------------------------------------------- -
T is frequently switching the redo log files within 5min approx..
i am facing frequent switching of redo logs within 5minutes
can you please tell how to resolve
thanks for helpHi,
I found this:
More frequent log switches may result in decreased performance. If your redo logs switches so faster Oracle will stop processing until the checkpoint completes successfully. Generally it is recommended to size your redo log file in a way that Oracle performs a log switch every 15 to 30 minutes.
A recommended approach is to
Query V$LOG view to determine the current size of the redo log members.
Record the number of log switches per hour.
Increase the log file size so that Oracle switches at the recommended rate of one switch per 15 to 30 minutes.
You can also check messages in the alert log in order to determine how fast Oracle is filling and switching logs. Suppose if your database redo log file size is set to 1MB. It means that Oracle switches the logs every 1 minute. So you will need to increase the size of redo log file to 30MB so that Oracle switches per 30 minutes.
It is also recommended to ensure that your online redo log files do not switch too often during high activity time. Instead in the period of high activity it should switch less while it should switch enough times during the time of low processing workloads. Many database administrators create PL/SQL programs to ensure that the logs switch every 15 to 30 minutes during times when activity is low.
Oracle ARCHIVE_LAG_TARGET can also be used to force a log switch after the specified amount of time elapses. The basic purpose of ARCHIVE_LAG_TARGET parameter is to control the amount of data that is lost and effectively increasing the availability of the standby database but many database administrators set ARCHIVE_LAG_TARGET parameter to make sure that the logs switch at regular intervals during lower activity time periods.
You should also keep in mind that how the size of the online redo log files will affect the instance recovery. Remember the lesser the checkpoints are taken; the longer will be the instance recovery duration. You can decrease the instance recovery time by appropriately setting the LOG_CHECKPOINT_TIMEOUT, LOG_CHECKPOINT_INTERVAL and FAST_START_MTTR_TARGET parameters. -
Status of online redo log file INVALID warning appears during online backup
Hi All,
I have a peculiar problem in one of the SAP ECC 6.0 systems. The daily online backup is getting completed with warnings.
Please find below the warnings in DB12 logs:
BR0335W Status of online redo log file /oracle/AS0/mirrlogB/log_g18m2.dbf is INVALID
BR0274W File '/oracle/AS0/mirrlogB/log_g18m2.dbf' not found
BR0335W Status of online redo log file /oracle/AS0/mirrlogA/log_g50_m2.dbf is INVALID
BR0274W File '/oracle/AS0/mirrlogA/log_g50_m2.dbf' not found
BR0335W Status of online redo log file /oracle/AS0/mirrlogB/log_g51_m2.dbf is INVALID
BR0274W File '/oracle/AS0/mirrlogB/log_g51_m2.dbf' not found
BR0335W Status of online redo log file /oracle/AS0/mirrlogA/log_g52_m2.dbf is INVALID
BR0274W File '/oracle/AS0/mirrlogA/log_g52_m2.dbf' not found
BR0335W Status of online redo log file /oracle/AS0/mirrlogA/log_g53_m2.dbf is INVALID
BR0274W File '/oracle/AS0/mirrlogA/log_g53_m2.dbf' not found
BR0335W Status of online redo log file /oracle/AS0/mirrlogA/log_g54_m2.dbf is INVALID
BR0274W File '/oracle/AS0/mirrlogA/log_g54_m2.dbf' not found
BR0335W Status of online redo log file /oracle/AS0/mirrlogA/log_g55_m2.dbf is INVALID
BR0274W File '/oracle/AS0/mirrlogA/log_g55_m2.dbf' not found
BR0335W Status of online redo log file /oracle/AS0/mirrlogA/log_g56_m2.dbf is INVALID
BR0274W File '/oracle/AS0/mirrlogA/log_g56_m2.dbf' not found
BR0335W Status of online redo log file /oracle/AS0/mirrlogB/log_g57_m2.dbf is INVALID
BR0274W File '/oracle/AS0/mirrlogB/log_g57_m2.dbf' not found
BR0335W Status of online redo log file /oracle/AS0/mirrlogA/log_g58_m2.dbf is INVALID
BR0274W File '/oracle/AS0/mirrlogA/log_g58_m2.dbf' not found
BR0335W Status of online redo log file /oracle/AS0/mirrlogB/log_g59_m2.dbf is INVALID
BR0274W File '/oracle/AS0/mirrlogB/log_g59_m2.dbf' not found
For the above mentioned alerts I followed the recommendations of SAP Note 491160. I dropped and recreated the mirrorlog files. But the next day again when I checked the backup it finished with warnings. At the database level there is no problem
SQL> select * from v$logfile;
GROUP# STATUS TYPE
MEMBER
IS_
59 ONLINE
/oracle/AS0/origlogB/log_g59_m1.dbf
NO
59 ONLINE
/oracle/AS0/mirrlogB/log_g59_m2.dbf
NO
GROUP# STATUS TYPE
MEMBER
IS_
58 ONLINE
/oracle/AS0/origlogA/log_g58_m1.dbf
NO
58 ONLINE
/oracle/AS0/mirrlogA/log_g58_m2.dbf
GROUP# STATUS TYPE
MEMBER
IS_
NO
57 ONLINE
/oracle/AS0/origlogB/log_g57_m1.dbf
NO
57 ONLINE
GROUP# STATUS TYPE
MEMBER
IS_
/oracle/AS0/mirrlogB/log_g57_m2.dbf
NO
56 ONLINE
/oracle/AS0/origlogA/log_g56_m1.dbf
NO
GROUP# STATUS TYPE
MEMBER
IS_
56 ONLINE
/oracle/AS0/mirrlogA/log_g56_m2.dbf
NO
55 ONLINE
/oracle/AS0/origlogA/log_g55_m1.dbf
NO
54 ONLINE
/oracle/AS0/origlogA/log_g54_m1.dbf
GROUP# STATUS TYPE
MEMBER
IS_
NO
54 ONLINE
/oracle/AS0/mirrlogA/log_g54_m2.dbf
NO
53 ONLINE
GROUP# STATUS TYPE
MEMBER
IS_
/oracle/AS0/origlogA/log_g53_m1.dbf
NO
53 ONLINE
/oracle/AS0/mirrlogA/log_g53_m2.dbf
NO
GROUP# STATUS TYPE
MEMBER
IS_
52 ONLINE
/oracle/AS0/origlogA/log_g52_m1.dbf
NO
52 ONLINE
/oracle/AS0/mirrlogA/log_g52_m2.dbf
NO
GROUP# STATUS TYPE
MEMBER
IS_
51 ONLINE
/oracle/AS0/origlogB/log_g51_m1.dbf
NO
51 ONLINE
/oracle/AS0/mirrlogB/log_g51_m2.dbf
GROUP# STATUS TYPE
MEMBER
IS_
NO
50 ONLINE
/oracle/AS0/origlogA/log_g50_m1.dbf
NO
50 ONLINE
GROUP# STATUS TYPE
MEMBER
IS_
/oracle/AS0/mirrlogA/log_g50_m2.dbf
NO
8 ONLINE
/oracle/AS0/origlogB/log_g18m1.dbf
As you can see from the above output at the database level everything is fine. So why during backup it is giving me warnings in DB12. Any help with this regard will be appreciated.
Regards
Mitesh NairHi Joe,
My OS is HP-UX. I dont think its a permission problem. Please find below the contents of origlogA and mirrlogA
predbci2:/oracle/AS0/origlogA#ls -rtl
total 1433712
drwxrwxrwx 2 oraas0 dba 96 Oct 15 03:27 cntrl
-rw-rw---- 1 oraas0 dba 104858624 Dec 4 01:50 log_g52_m1.dbf
-rw-rw---- 1 oraas0 dba 104858624 Dec 4 03:51 log_g50_m1.dbf
-rw-rw---- 1 oraas0 dba 104858624 Dec 4 05:51 log_g54_m1.dbf
-rw-rw---- 1 oraas0 dba 104858624 Dec 4 07:52 log_g53_m1.dbf
-rw-rw---- 1 oraas0 dba 104858624 Dec 4 09:50 log_g55_m1.dbf
-rw-rw---- 1 oraas0 dba 104858624 Dec 4 10:50 log_g56_m1.dbf
-rw-rw---- 1 oraas0 dba 104858624 Dec 4 12:41 log_g58_m1.dbf
predbci2:/oracle/AS0/mirrlogA#ls -rtl
total 1433728
-rw-rw---- 1 oraas0 dba 104858624 Dec 4 01:50 log_g52_m2.dbf
-rw-rw---- 1 oraas0 dba 104858624 Dec 4 03:51 log_g50_m2.dbf
-rw-rw---- 1 oraas0 dba 104858624 Dec 4 05:51 log_g54_m2.dbf
-rw-rw---- 1 oraas0 dba 104858624 Dec 4 07:52 log_g53_m2.dbf
-rw-rw---- 1 oraas0 dba 104858624 Dec 4 09:50 log_g55_m2.dbf
-rw-rw---- 1 oraas0 dba 104858624 Dec 4 10:50 log_g56_m2.dbf
-rw-rw---- 1 oraas0 dba 104858624 Dec 4 12:41 log_g58_m2.dbf
Regards
Mitesh -
Hi,
I have a very light application in Oracle 9.2.0.7 in Linux-32bits that is generating 400 logfiles a day. I can´t find why those logs are being generated!
The only thing relevant in that application is a big table that serves only for insert command (1000 per hour) for audit reasons. But this table was created with NOLOGGING option.
Redo Size: 4 groups of 40 Mb each.
The insert statement uses a sequence to generate a unique key. Is this sequence causing my big logfile generation?
Thanks,
Paulo.Here is the statspack:
STATSPACK report for
DB Name DB Id Instance Inst Num Release Cluster Host
DB 378381468 DB 1 9.2.0.7.0 NO host
Snap Id Snap Time Sessions Curs/Sess Comment
Begin Snap: 12 28-Jun-07 11:05:11 26 1,198.7
End Snap: 13 28-Jun-07 12:05:24 29 1,077.2
Elapsed: 60.22 (mins)
Cache Sizes (end)
~~~~~~~~~~~~~~~~~
Buffer Cache: 512M Std Block Size: 8K
Shared Pool Size: 512M Log Buffer: 5,120K
Load Profile
~~~~~~~~~~~~ Per Second Per Transaction
Redo size: 281,252.38 2,073.48
Logical reads: 73,113.76 539.02
Block changes: 3,133.29 23.10
Physical reads: 3.24 0.02
Physical writes: 21.39 0.16
User calls: 26.12 0.19
Parses: 145.64 1.07
Hard parses: 0.81 0.01
Sorts: 138.33 1.02
Logons: 0.69 0.01
Executes: 443.27 3.27
Transactions: 135.64
% Blocks changed per Read: 4.29 Recursive Call %: 98.97
Rollback per transaction %: 0.13 Rows per Sort: 17.26
Instance Efficiency Percentages (Target 100%)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Buffer Nowait %: 99.99 Redo NoWait %: 100.00
Buffer Hit %: 100.00 In-memory Sort %: 99.99
Library Hit %: 99.66 Soft Parse %: 99.44
Execute to Parse %: 67.14 Latch Hit %: 99.93
Parse CPU to Parse Elapsd %: 55.03 % Non-Parse CPU: 99.22
Shared Pool Statistics Begin End
Memory Usage %: 91.06 91.23
% SQL with executions>1: 44.54 39.78
% Memory for SQL w/exec>1: 43.09 33.89
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~ % Total
Event Waits Time (s) Ela Time
CPU time 3,577 84.73
log file parallel write 854,726 359 8.51
row cache lock 56,780 104 2.47
process startup 172 91 2.16
SQL*Net message from dblink 5,001 22 .53
Wait Events for DB: DB Instance: DB Snaps: 12 -13
-> 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
log file parallel write 854,726 0 359 0 1.7
row cache lock 56,780 0 104 2 0.1
process startup 172 4 91 530 0.0
SQL*Net message from dblink 5,001 0 22 4 0.0
log file sync 3,015 3 19 6 0.0
enqueue 471 1 9 20 0.0
buffer busy waits 20,290 0 8 0 0.0
db file sequential read 3,853 0 6 2 0.0
SQL*Net more data from dblin 88,584 0 5 0 0.2
control file parallel write 1,704 0 5 3 0.0
latch free 1,404 748 4 3 0.0
single-task message 134 0 4 27 0.0
LGWR wait for redo copy 8,230 1 2 0 0.0
log file switch completion 60 0 2 32 0.0
log file sequential read 1,333 0 2 1 0.0
control file sequential read 4,530 0 1 0 0.0
db file scattered read 246 0 0 1 0.0
SQL*Net more data to client 7,292 0 0 0 0.0
SQL*Net break/reset to clien 72 0 0 1 0.0
db file parallel write 4,568 0 0 0 0.0
log file single write 62 0 0 0 0.0
async disk IO 3,410 0 0 0 0.0
SQL*Net message to dblink 5,001 0 0 0 0.0
direct path read (lob) 84 0 0 0 0.0
direct path read 318 0 0 0 0.0
direct path write 312 0 0 0 0.0
buffer deadlock 115 115 0 0 0.0
SQL*Net message from client 86,475 0 27,758 321 0.2
jobq slave wait 4,594 4,532 13,455 2929 0.0
SQL*Net more data from clien 602 0 1 2 0.0
SQL*Net message to client 86,481 0 0 0 0.2
Background Wait Events for DB: DB Instance: DB Snaps: 12 -13
-> 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 854,744 0 359 0 1.7
control file parallel write 1,704 0 5 3 0.0
LGWR wait for redo copy 8,230 1 2 0 0.0
log file sequential read 1,333 0 2 1 0.0
control file sequential read 1,849 0 1 1 0.0
db file parallel write 4,567 0 0 0 0.0
latch free 74 0 0 0 0.0
rdbms ipc reply 65 0 0 0 0.0
log file single write 62 0 0 0 0.0
async disk IO 3,410 0 0 0 0.0
db file sequential read 1 0 0 8 0.0
buffer busy waits 5 0 0 0 0.0
direct path read 248 0 0 0 0.0
direct path write 248 0 0 0 0.0
rdbms ipc message 868,357 6,776 30,095 35 1.8
pmon timer 1,204 1,204 3,529 2931 0.0
smon timer 154 0 3,514 22816 0.0
Instance Activity Stats for DB: DB Instance: DB Snaps: 12 -13
Statistic Total per Second per Trans
active txn count during cleanout 2,844 0.8 0.0
background checkpoints completed 31 0.0 0.0
background checkpoints started 31 0.0 0.0
background timeouts 7,956 2.2 0.0
branch node splits 15 0.0 0.0
buffer is not pinned count 324,721,116 89,875.8 662.6
buffer is pinned count 308,901,876 85,497.3 630.3
bytes received via SQL*Net from c 8,048,130 2,227.6 16.4
bytes received via SQL*Net from d 181,575,342 50,256.1 370.5
bytes sent via SQL*Net to client 33,964,494 9,400.6 69.3
bytes sent via SQL*Net to dblink 933,170 258.3 1.9
calls to get snapshot scn: kcmgss 9,900,434 2,740.2 20.2
calls to kcmgas 985,222 272.7 2.0
calls to kcmgcs 11,669 3.2 0.0
change write time 9,910 2.7 0.0
cleanout - number of ktugct calls 18,903 5.2 0.0
cleanouts and rollbacks - consist 33 0.0 0.0
cleanouts only - consistent read 932 0.3 0.0
cluster key scan block gets 289,955 80.3 0.6
cluster key scans 101,840 28.2 0.2
commit cleanout failures: block l 0 0.0 0.0
commit cleanout failures: buffer 113 0.0 0.0
commit cleanout failures: callbac 96 0.0 0.0
commit cleanout failures: cannot 3,095 0.9 0.0
commit cleanouts 1,966,376 544.3 4.0
commit cleanouts successfully com 1,963,072 543.3 4.0
commit txn count during cleanout 309,283 85.6 0.6
consistent changes 5,245,452 1,451.8 10.7
consistent gets 242,967,989 67,248.3 495.8
consistent gets - examination 135,768,580 37,577.8 277.0
CPU used by this session 357,659 99.0 0.7
CPU used when call started 344,951 95.5 0.7
CR blocks created 768 0.2 0.0
current blocks converted for CR 0 0.0 0.0
cursor authentications 886 0.3 0.0
data blocks consistent reads - un 1,760 0.5 0.0
db block changes 11,320,580 3,133.3 23.1
db block gets 21,192,200 5,865.5 43.2
DBWR buffers scanned 0 0.0 0.0
DBWR checkpoint buffers written 69,649 19.3 0.1
DBWR checkpoints 31 0.0 0.0
DBWR free buffers found 0 0.0 0.0
DBWR lru scans 0 0.0 0.0
DBWR make free requests 0 0.0 0.0
DBWR revisited being-written buff 0 0.0 0.0
DBWR summed scan depth 0 0.0 0.0
DBWR transaction table writes 2,070 0.6 0.0
DBWR undo block writes 44,323 12.3 0.1
deferred (CURRENT) block cleanout 745,333 206.3 1.5
dirty buffers inspected 1 0.0 0.0
enqueue conversions 8,193 2.3 0.0
enqueue deadlocks 1 0.0 0.0
enqueue releases 2,002,960 554.4 4.1
enqueue requests 2,002,963 554.4 4.1
enqueue timeouts 3 0.0 0.0
enqueue waits 451 0.1 0.0
Instance Activity Stats for DB: DB Instance: DB Snaps: 12 -13
Statistic Total per Second per Trans
exchange deadlocks 115 0.0 0.0
execute count 1,601,528 443.3 3.3
free buffer inspected 30 0.0 0.0
free buffer requested 1,196,628 331.2 2.4
hot buffers moved to head of LRU 26,707 7.4 0.1
immediate (CR) block cleanout app 965 0.3 0.0
immediate (CURRENT) block cleanou 10,817 3.0 0.0
index fast full scans (full) 0 0.0 0.0
index fetch by key 131,028,270 36,265.8 267.4
index scans kdiixs1 17,868,907 4,945.7 36.5
leaf node splits 4,528 1.3 0.0
leaf node 90-10 splits 3,017 0.8 0.0
logons cumulative 2,499 0.7 0.0
messages received 859,631 237.9 1.8
messages sent 859,631 237.9 1.8
no buffer to keep pinned count 21,253 5.9 0.0
no work - consistent read gets 87,667,752 24,264.5 178.9
opened cursors cumulative 528,984 146.4 1.1
OS Involuntary context switches 0 0.0 0.0
OS Page faults 0 0.0 0.0
OS Page reclaims 0 0.0 0.0
OS System time used 0 0.0 0.0
OS User time used 0 0.0 0.0
OS Voluntary context switches 0 0.0 0.0
parse count (failures) 7 0.0 0.0
parse count (hard) 2,928 0.8 0.0
parse count (total) 526,209 145.6 1.1
parse time cpu 2,778 0.8 0.0
parse time elapsed 5,048 1.4 0.0
physical reads 11,690 3.2 0.0
physical reads direct 6,698 1.9 0.0
physical reads direct (lob) 102 0.0 0.0
physical writes 77,270 21.4 0.2
physical writes direct 7,620 2.1 0.0
physical writes direct (lob) 0 0.0 0.0
physical writes non checkpoint 33,360 9.2 0.1
pinned buffers inspected 0 0.0 0.0
prefetched blocks 799 0.2 0.0
prefetched blocks aged out before 0 0.0 0.0
process last non-idle time 3,630 1.0 0.0
recursive calls 9,053,277 2,505.8 18.5
recursive cpu usage 255,973 70.9 0.5
redo blocks written 2,572,625 712.1 5.3
redo buffer allocation retries 50 0.0 0.0
redo entries 3,074,994 851.1 6.3
redo log space requests 60 0.0 0.0
redo log space wait time 193 0.1 0.0
redo ordering marks 0 0.0 0.0
redo size 1,016,164,852 281,252.4 2,073.5
redo synch time 1,956 0.5 0.0
redo synch writes 5,317 1.5 0.0
redo wastage 259,689,040 71,876.3 529.9
redo write time 37,488 10.4 0.1
redo writer latching time 242 0.1 0.0
redo writes 854,744 236.6 1.7
rollback changes - undo records a 1,098 0.3 0.0
Instance Activity Stats for DB: DB Instance: DB Snaps: 12 -13
Statistic Total per Second per Trans
rollbacks only - consistent read 747 0.2 0.0
rows fetched via callback 117,908,375 32,634.5 240.6
session connect time 0 0.0 0.0
session cursor cache count 16 0.0 0.0
session cursor cache hits 484,372 134.1 1.0
session logical reads 264,160,020 73,113.8 539.0
session pga memory 16,473,320 4,559.5 33.6
session pga memory max 16,914,080 4,681.5 34.5
session uga memory 17,216,514,728 4,765,157.7 35,130.3
session uga memory max 1,865,036,296 516,201.6 3,805.6
shared hash latch upgrades - no w 17,251,803 4,774.9 35.2
shared hash latch upgrades - wait 24,671 6.8 0.1
sorts (disk) 32 0.0 0.0
sorts (memory) 499,747 138.3 1.0
sorts (rows) 8,626,333 2,387.6 17.6
SQL*Net roundtrips to/from client 80,069 22.2 0.2
SQL*Net roundtrips to/from dblink 5,001 1.4 0.0
summed dirty queue length 0 0.0 0.0
switch current to new buffer 1 0.0 0.0
table fetch by rowid 238,882,317 66,117.4 487.4
table fetch continued row 4,436,670 1,228.0 9.1
table scan blocks gotten 5,066,302 1,402.2 10.3
table scan rows gotten 134,679,712 37,276.4 274.8
table scans (direct read) 0 0.0 0.0
table scans (long tables) 447 0.1 0.0
table scans (short tables) 152,382 42.2 0.3
transaction rollbacks 530 0.2 0.0
transaction tables consistent rea 0 0.0 0.0
transaction tables consistent rea 0 0.0 0.0
user calls 94,382 26.1 0.2
user commits 489,423 135.5 1.0
user rollbacks 653 0.2 0.0
write clones created in backgroun 11 0.0 0.0
write clones created in foregroun 878 0.2 0.0
Tablespace IO Stats for DB: DB Instance: DB Snaps: 12 -13
->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)
T1_UNDO
31 0 0.0 1.0 46,535 13 344 0.4
T1
31 0 0.0 1.0 13,754 4 3,657 0.4
T2
3,308 1 0.8 1.1 2,973 1 0 0.0
T3
31 0 0.0 1.0 5,710 2 16,240 0.4
T4
555 0 4.0 1.0 600 0 0 0.0
SYSTEM
429 0 3.9 2.5 280 0 49 0.2
TEMP
134 0 0.4 48.1 238 0 0 0.0
T1_16K
31 0 0.0 1.0 31 0 0 0.0
T2_16K
31 0 0.0 1.0 31 0 0 0.0
Buffer Pool Statistics for DB: DB Instance: DB Snaps: 12 -13
-> Standard block size Pools D: default, K: keep, R: recycle
-> Default Pools for other block sizes: 2k, 4k, 8k, 16k, 32k
Free Write Buffer
Number of Cache Buffer Physical Physical Buffer Complete Busy
P Buffers Hit % Gets Reads Writes Waits Waits Waits
D 49,625 100.0 263,975,320 4,909 69,666 0 0 20,290
16k 7,056 100.0 30 0 0 0 0 0
Instance Recovery Stats for DB: DB Instance: DB Snaps: 12 -13
-> 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 0 10518 10000 73728 186265 10000
E 0 0 13189 10000 73728 219498 10000
Buffer Pool Advisory for DB: DB Instance: DB End Snap: 13
-> 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 32 .1 3,970 205.60 4,726,309,734
D 64 .2 7,940 111.86 2,571,419,284
D 96 .2 11,910 59.99 1,379,092,849
D 128 .3 15,880 32.24 741,224,090
D 160 .4 19,850 16.05 369,050,333
D 192 .5 23,820 1.28 29,352,221
D 224 .6 27,790 1.05 24,077,507
D 256 .6 31,760 1.03 23,723,389
D 288 .7 35,730 1.02 23,518,434
D 320 .8 39,700 1.01 23,328,106
D 352 .9 43,670 1.01 23,193,257
D 384 1.0 47,640 1.00 23,064,957
D 400 1.0 49,625 1.00 22,987,576
D 416 1.0 51,610 1.00 22,927,325
D 448 1.1 55,580 0.99 22,824,032
D 480 1.2 59,550 0.99 22,713,509
D 512 1.3 63,520 0.99 22,649,147
D 544 1.4 67,490 0.98 22,605,489
D 576 1.4 71,460 0.98 22,525,897
D 608 1.5 75,430 0.97 22,407,418
D 640 1.6 79,400 0.96 22,022,381
16k 16 .1 1,008 1.00 139,218,299
16k 32 .3 2,016 1.00 139,211,699
16k 48 .4 3,024 1.00 139,207,678
16k 64 .6 4,032 1.00 139,202,581
16k 80 .7 5,040 1.00 139,198,339
16k 96 .9 6,048 1.00 139,193,448
16k 112 1.0 7,056 1.00 139,188,446
16k 128 1.1 8,064 1.00 139,183,808
16k 144 1.3 9,072 1.00 139,179,598
16k 160 1.4 10,080 1.00 139,175,656
16k 176 1.6 11,088 1.00 139,170,607
16k 192 1.7 12,096 1.00 139,166,491
16k 208 1.9 13,104 1.00 139,162,487
16k 224 2.0 14,112 1.00 139,158,197
16k 240 2.1 15,120 1.00 139,153,797
16k 256 2.3 16,128 1.00 139,149,365
16k 272 2.4 17,136 1.00 139,144,252
16k 288 2.6 18,144 1.00 139,140,121
16k 304 2.7 19,152 1.00 139,135,435
16k 320 2.9 20,160 1.00 139,130,845
Buffer wait Statistics for DB: DB Instance: DB Snaps: 12 -13
-> ordered by wait time desc, waits desc
Tot Wait Avg
Class Waits Time (s) Time (ms)
data block 19,912 8 0
undo header 343 0 0
segment header 34 0 0
undo block 1 0 0
Enqueue activity for DB: DB Instance: DB Snaps: 12 -13
-> Enqueue stats gathered prior to 9i should not be compared with 9i data
-> ordered by Wait Time desc, Waits desc
Avg Wt Wait
Eq Requests Succ Gets Failed Gets Waits Time (ms) Time (s)
TM 981,781 981,773 0 7 1,365.43 10
TX 983,944 983,906 0 412 .59 0
HW 4,645 4,645 0 32 .09 0
Rollback Segment Stats for DB: DB Instance: DB Snaps: 12 -13
->A high value for "Pct Waits" suggests more rollback segments may be required
->RBS stats may not be accurate between begin and end snaps when using Auto Undo
managment, as RBS may be dynamically created and dropped as needed
Trans Table Pct Undo Bytes
RBS No Gets Waits Written Wraps Shrinks Extends
0 155.0 0.00 0 0 0 0
1 202,561.0 0.00 31,178,710 40 2 3
2 191,044.0 0.00 30,067,156 23 2 6
3 195,891.0 0.00 30,470,548 39 1 3
4 203,928.0 0.00 31,822,638 38 2 5
5 196,386.0 0.00 -4,264,350,168 38 1 3
6 204,125.0 0.00 32,081,200 24 1 7
7 192,169.0 0.00 33,732,012 45 3 6
8 195,819.0 0.00 30,503,550 40 2 2
9 202,905.0 0.00 31,595,438 40 2 4
10 195,796.0 0.00 30,566,652 29 4 9
Rollback Segment Storage for DB: DB Instance: DB Snaps: 12 -13
->Optimal Size should be larger than Avg Active
RBS No Segment Size Avg Active Optimal Size Maximum Size
0 385,024 0 385,024
1 12,705,792 944,176 2,213,732,352
2 11,657,216 1,548,937 2,214,715,392
3 13,754,368 832,465 243,392,512
4 13,754,368 946,902 235,069,440
5 12,705,792 964,352 2,195,374,080
6 20,045,824 1,232,438 2,416,041,984
7 12,705,792 977,490 3,822,182,400
8 10,608,640 875,068 243,392,512
9 11,657,216 878,119 243,392,512
10 18,997,248 1,034,104 2,281,889,792
Undo Segment Summary for DB: DB Instance: DB Snaps: 12 -13
-> 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 Snapshot Out of uS/uR/uU/
TS# Blocks Trans Len (s) Concurcy Too Old Space eS/eR/eU
1 44,441 ########## 47 2 0 0 0/0/0/0/0/0
Undo Segment Stats for DB: DB Instance: DB Snaps: 12 -13
-> ordered by Time desc
Undo Num Max Qry Max Tx Snap Out of uS/uR/uU/
End Time Blocks Trans Len (s) Concy Too Old Space eS/eR/eU
28-Jun 11:56 7,111 ######## 47 1 0 0 0/0/0/0/0/0
28-Jun 11:46 10,782 ######## 18 2 0 0 0/0/0/0/0/0
28-Jun 11:36 6,170 ######## 42 1 0 0 0/0/0/0/0/0
28-Jun 11:26 4,966 ######## 13 1 0 0 0/0/0/0/0/0
28-Jun 11:16 6,602 ######## 40 1 0 0 0/0/0/0/0/0
28-Jun 11:06 8,810 ######## 10 1 0 0 0/0/0/0/0/0
Latch Activity for DB: DB Instance: DB Snaps: 12 -13
->"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 Requests Miss /Miss (s) Requests Miss
active checkpoint queue 9,585 0.0 0.0 0 0
alert log latch 158 0.0 0 0
archive control 220 0.0 0 0
archive process latch 220 0.5 1.0 0 0
cache buffer handles 264,718 0.0 0.0 0 0
cache buffers chains 416,051,175 0.0 0.0 4 401,018 0.0
cache buffers lru chain 1,285,963 0.0 0.0 0 1,206,550 0.0
channel handle pool latc 4,927 0.0 0 0
channel operations paren 10,788 0.0 0 0
checkpoint queue latch 528,319 0.0 0.0 0 69,506 0.0
child cursor hash table 35,371 0.0 0 0
Consistent RBA 854,833 0.0 0.0 0 0
dml lock allocation 1,963,007 0.9 0.0 0 0
dummy allocation 4,995 0.0 0 0
enqueue hash chains 4,014,593 0.5 0.0 0 0
enqueues 94,666 0.0 0.0 0 0
event group latch 2,340 0.0 0 0
FAL request queue 72 0.0 0 0
FIB s.o chain latch 310 0.0 0 0
FOB s.o list latch 6,769 0.0 0 0
global tx hash mapping 10,388 0.0 0 0
hash table column usage 16 0.0 0 479 0.0
job workq parent latch 0 0 316 0.0
job_queue_processes para 116 0.0 0 0
ktm global data 200 0.0 0 0
lgwr LWN SCN 855,008 0.0 0.0 0 0
library cache 5,836,900 0.4 0.0 0 8,926 0.6
library cache load lock 468 0.0 0 0
library cache pin 3,510,695 0.0 0.0 0 0
library cache pin alloca 1,402,523 0.0 0.0 0 0
list of block allocation 6,115 0.0 0 0
loader state object free 620 0.0 0 0
message pool operations 262 0.0 0 0
messages 2,664,950 0.4 0.0 0 0
mostly latch-free SCN 856,000 0.1 0.0 0 0
multiblock read objects 3,184 0.0 0 0
ncodef allocation latch 57 0.0 0 0
object stats modificatio 8 0.0 0 0
post/wait queue 6,183 0.0 0 3,082 0.0
process allocation 4,677 0.0 0 2,340 0.0
process group creation 4,677 0.0 0 0
redo allocation 4,784,936 0.5 0.0 0 0
redo copy 0 0 3,081,261 0.3
redo writing 2,576,299 0.0 0.2 0 0
row cache enqueue latch 3,017,144 0.0 0.0 0 0
row cache objects 5,049,552 0.8 0.0 0 92 0.0
sequence cache 984,824 0.0 0.1 0 0
session allocation 110,417 0.0 0.0 0 0
session idle bit 205,319 0.0 0 0
session switching 57 0.0 0 0
Latch Activity for DB: DB Instance: DB Snaps: 12 -13
->"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 Requests Miss /Miss (s) Requests Miss
session timer 1,204 0.0 0 0
shared pool 2,409,725 0.1 0.1 0 0
simulator hash latch 7,439,429 0.0 0.0 0 0
simulator lru latch 202 0.0 0 128,961 0.2
sort extent pool 1,053 0.0 0 0
SQL memory manager worka 67 0.0 0 0
temp lob duration state 187 0.0 0 0
transaction allocation 7,290 0.0 0 0
transaction branch alloc 5,668 0.0 0 0
undo global data 3,002,808 0.4 0.0 0 0
user lock 8,642 0.0 0 0
Latch Sleep breakdown for DB: DB Instance: DB Snaps: 12 -13
-> ordered by misses desc
Get Spin &
Latch Name Requests Misses Sleeps Sleeps 1->4
cache buffers chains 416,051,175 197,296 750 196776/298/2
15/7/0
row cache objects 5,049,552 42,368 38 42330/38/0/0
/0
redo allocation 4,784,936 24,766 77 24697/61/8/0
/0
library cache 5,836,900 23,477 276 23207/264/6/
0/0
enqueue hash chains 4,014,593 21,061 26 21035/26/0/0
/0
dml lock allocation 1,963,007 17,887 16 17872/14/1/0
/0
undo global data 3,002,808 12,350 8 12342/8/0/0/
0
messages 2,664,950 10,131 5 10126/5/0/0/
0
shared pool 2,409,725 1,362 189 1175/185/2/0
/0
row cache enqueue latch 3,017,144 470 7 463/7/0/0/0
mostly latch-free SCN 856,000 434 1 433/1/0/0/0
library cache pin 3,510,695 345 4 341/4/0/0/0
sequence cache 984,824 53 4 49/4/0/0/0
library cache pin allocati 1,402,523 35 1 34/1/0/0/0
redo writing 2,576,299 5 1 4/1/0/0/0
archive process latch 220 1 1 0/1/0/0/0
Latch Miss Sources for DB: DB Instance: DB Snaps: 12 -13
-> only latches with sleeps are shown
-> ordered by name, sleeps desc
NoWait Waiter
Latch Name Where Misses Sleeps Sleeps
archive process latch kcrrpa 0 1 0
cache buffers chains kcbgtcr: fast path 0 346 188
cache buffers chains kcbgtcr: kslbegin excl 0 163 239
cache buffers chains kcbrls: kslbegin 0 86 170
cache buffers chains kcbget: pin buffer 0 53 49
cache buffers chains kcbgcur: kslbegin 0 44 20
cache buffers chains kcbnlc 0 38 22
cache buffers chains kcbget: exchange 0 8 16
cache buffers chains kcbchg: kslbegin: call CR 0 3 21
cache buffers chains kcbget: exchange rls 0 3 2
cache buffers chains kcbnew 0 3 0
cache buffers chains kcbbxsv 0 2 0
cache buffers chains kcbchg: kslbegin: bufs not 0 1 23
dml lock allocation ktaiam 0 13 1
dml lock allocation ktaidm 0 3 15
enqueue hash chains ksqgtl3 0 22 2
enqueue hash chains ksqrcl 0 4 24
library cache kglic 0 55 4
library cache kglhdgn: child: 0 42 86
library cache kglobpn: child: 0 26 32
library cache kglpndl: child: after proc 0 14 0
library cache kglpndl: child: before pro 0 13 73
library cache kglpin: child: heap proces 0 12 29
library cache kgllkdl: child: cleanup 0 11 4
library cache kglupc: child 0 4 7
library cache kgldti: 2child 0 2 4
library cache kglpnp: child 0 1 4
library cache pin kglpnal: child: alloc spac 0 3 3
library cache pin kglpndl 0 1 1
library cache pin alloca kglpnal 0 1 0
messages ksaamb: after wakeup 0 3 2
messages ksarcv 0 2 2
mostly latch-free SCN kcslcu3 0 1 1
redo allocation kcrfwr 0 74 8
redo allocation kcrfwi: more space 0 -
How to recover from one corrupted redo log file in NOARCHIVE mode?
Oracle 10.2.1.
The redo log file was corrupted and Oracle can't work.
When I use STARTUP mount, I got no error msg.
SQL> startup mount
ORACLE instance started.
Total System Global Area 1652555776 bytes
Fixed Size 1251680 bytes
Variable Size 301991584 bytes
Database Buffers 1342177280 bytes
Redo Buffers 7135232 bytes
Database mounted.
But I have some applications which are depended on Oracle can't be started.
So, I tried STARTUP open. But I got error msg.
SQL> startup open
ORACLE instance started.
Total System Global Area 1652555776 bytes
Fixed Size 1251680 bytes
Variable Size 301991584 bytes
Database Buffers 1342177280 bytes
Redo Buffers 7135232 bytes
Database mounted.
ORA-00368: checksum error in redo log block
ORA-00353: log corruption near block 497019 change 42069302 time 11/07/2007
23:43:09
ORA-00312: online log 4 thread 1:
'G:\ORACLE\PRODUCT\10.2.0\ORADATA\NMDATA\REDO04.LOG'
So, how can I restore and recover my database?
If use RMAN, how to do that?
Any help will be appreciated.
Thanks.Hi, Yingkuan,
Thanks for the helps.
Actually, I have 10 redo log files exists. All of them are here.
I tried your suggestion:
alter database clear unarchived logfile group 4;
The error msg I got is the same as before:
SQL> alter database clear unarchived logfile group 4;
alter database clear unarchived logfile group 4
ERROR at line 1:
ORA-01624: log 4 needed for crash recovery of instance nmdata (thread 1)
ORA-00312: online log 4 thread 1:
'G:\ORACLE\PRODUCT\10.2.0\ORADATA\NMDATA\REDO04.LOG'
Compared to losing all the data, it is OK for me lose some of them.
I have more than 1 TB data stored and 99.9% of them are raster images.
The loading of these data were the headache. If I can save them, I can bear the lost.
I want to grasp the last straw.
But I don't know how set the parameter: allowresetlogs_corruption
I got the error msg:
SQL> set allowresetlogs_corruption=true;
SP2-0735: unknown SET option beginning "_allow_res..."
I have run the command:
Recover database until cancel
Alter database open resetlogs
The error msg I got is the following:
SQL> recover database until cancel
ORA-00279: change 41902930 generated at 11/05/2007 22:01:48 needed for thread 1
ORA-00289: suggestion :
D:\ORACLE\PRODUCT\10.2.0\FLASH_RECOVERY_AREA\NMDATA\ARCHIVELOG\2007_11_09\O1_MF_
1_1274_%U_.ARC
ORA-00280: change 41902930 for thread 1 is in sequence #1274
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: 'D:\ORACLE\PRODUCT\10.2.0\ORADATA\NMDATA\SYSTEM01.DBF'
ORA-01112: media recovery not started
SQL>
From the log file, I got the following:
ALTER DATABASE RECOVER database until cancel
Fri Nov 09 00:12:48 2007
Media Recovery Start
parallel recovery started with 2 processes
ORA-279 signalled during: ALTER DATABASE RECOVER database until cancel ...
Fri Nov 09 00:13:20 2007
ALTER DATABASE RECOVER CANCEL
Fri Nov 09 00:13:21 2007
ORA-1547 signalled during: ALTER DATABASE RECOVER CANCEL ...
Fri Nov 09 00:13:21 2007
ALTER DATABASE RECOVER CANCEL
ORA-1112 signalled during: ALTER DATABASE RECOVER CANCEL ...
Thank you very much. and I am looking forward to your followup input. -
Dataguard lost both Primary redo log and standby redo log files
Hi,
I am new to data guard, i came acorss a scenario where we loose both primary redo log file and standby redo log files.
Can someone please help me understand how to recover from this situation.
Thanks!>loose both primary redo log file and standby redo log files
We have to be very clear.
There are (set A) online redo log files and (set B) standby redo log files at (location 1) Primary and (location 2) Standby.
The standby redo log files, depending on the configuration, aren't strictly mandatory. The standby can be applying redo without online redo log files present as well, depending on how it was setup.
So, the question is : Did you lose online redo log files at the primary ? Didn't the primary shutdown itself then ? If so, you have to do an incomplete recovery at the primary OR switch over to the standby (which may or may not have received the last transaction, depending on how it was configured and operating) OR restore from the standby (again, with possible loss of transactions) to the primary.
Hemant K Chitale -
Log file switch (checkpoint incomplete)
hello,
Lately, I have a lot of update/delete work on my OLTP production database. Generally this database is heavy loaded with much inserts especially at the daytime so I do my work at nights :) However, this work cause some contention. I have run AWR raport and I see "log file switch (checkpoint incomplete)" on a second place in wait events. I have a six redo log groups, each file 400MB, redo log buffer 12MB, mttr 0, checkpoint interval 0 and checkpoint timeout 1800 so checkpoints are usually "made by" log switches. Normally I have 2-5 switches per hour, but when I am doing my work it's abut 15-20 switches/hour. Can I speed it up by resizing redo files or by adding more groups ? I don't have test environment to test it so I am wondering if somone has experiense with that?
thanks
10gr2, linuxHi Helter,
i have expirienced the same problem only with smaller log files and 3 groups, the solution you suggested helped me solve the issue, eversince i don't have any "checkpoint incomplete" error masaages in the alert log file.
i have enlarged each group to be 100 mb (initially was 50 mb) and added 2 more groups.
hope this solution will help you too.
dBarak -
Hoping for a quick response : EXP and Archived REDO log files
I apologize in advance if this question has been asked and answered 100 times. I admit I didn't search, I don't have time. I'm leaving on vacation tomorrow, and I need to know if I'm correct about something to do with backup / restore.
we have 10g R2 running a single instance on a single server. The application vendor has "embedded" oracle with their application. The vendor's backup is a batch file using EXP - thus:
exp system/xpwdxx@db full=y file=D:\Orant\admin\db\EXP\db_full.dmp log=D:\Orant\admin\db\EXP\db_full.txt direct=y compress=y
This command is executed nightly at midnight. The files are then backed up by our nightly backup to offsite storage media.
Te database is running in autoarchive mode. The problem is, the archived redo files filled the drive they were being stored on, and it is the drive the database is on. I used OS commands to move 136G of archived redo logs onto other storage media to free the drive.
My question: Since the EXP runs at midnight, when there is likely NO activity, do I need to run in AutoArchive Mode? From what I have read, you cannot even apply archived redo log files to this type of backup strategy (IMP) Is that true? We are ok losing changes since our last EXP. I have read a lot of stuff about restoring consistent vs. inconsistent, and just need to know: If my disk fails, and I have to start with a clean install of Oracle and nothing else, can I IMP this EXP and get back up and running as of the last EXP? Or do I need the autoarchived redo log files back to July 2009 (136G of them).
Hoping for a quick response
Best Regards, and thanks in advance
Bruce DavisBruce Davis wrote:
Amardeep Sidhu
Thank you for your quick reply. I am reading in the other responses that since I am using EXP without consistent=y, I might not even have a backup. The application vendor said that with this dmp file they can restore us to the most recent backup. I don't really care for this strategy as it is untested. I asked them to verify that they could restore us and they said they tested the dmp file and it was OK.
Thank you for taking the time to reply.
Best Regards
BruceThe dump file is probably ok in the sense it is not corrupted and can be used in an imp operation. That doesn't mean the data in it is transactionally consistent. And to use it at all, you have to have a database up and running. If the database is physically corrupted, you'll have to rebuild a new database from scratch before you can even think about using your dmp file.
Vendors never understand databases. I once had a vendor tell me that Oracle's performance would be intolerable if there were more than 5 concurrent connections. Well, maybe in HIS product ..... Discussions terminated quickly after he made that statement. -
Oracle 10g R2 Database Redo Log Files
I had 3 redo log files, each of size 50 MB. i added 3 more redo log files, each of size 250 MB.
Database is running in archive mode, files are generating with different sizes like 44 MB and 240 MB, i need to know is this harm for database or not?
to make all archive redo log files generation of equal size what should i do?
Please guideWaheed,
When the redo log switch willbe happening,oracle would be asking archiver to log that into the archive file.So in case you have any parameters set to make the switch happen at certain time,depending on the activity of teh database,the archive file size may vary.There is no harm wit the different sizes of the files.What matters is the transaction informaiton contained in them not their size.
to make all archive redo log files generation of equal size what should i do?
As mentioned by Syed, you can make the switch happen at a defined interval which will not ensure but still will be a step to make the archive files of the same size.But I shall say you should bother more about making sure that the files are available rather than their size.
Aman.... -
Sizing the redo log files using optimal_logfile_size view.
Regards
I have a specific question regarding logfile size. I have deployed a test database and i was exploring certain aspects with regards to selecting optimal size of redo logs for performance tuning using optimal_logfile_size view from v$instance_recovery. My main goal is to reduce the redo bytes required for instance recovery. Currently i have not been able to optimize the redo log file size. Here are the steps i followed:-
In order to use the advisory from v$instance_recovery i had to set fast_start_mttr_target parameter which is by default not set so i did these steps:-
1)SQL> sho parameter fast_start_mttr_target;
NAME TYPE VALUE
fast_start_mttr_target integer 0
2) Setting the fast_start_mttr_target requires nullifying following deferred parameters :-
SQL> show parameter log_checkpoint;
NAME TYPE VALUE
log_checkpoint_interval integer 0
log_checkpoint_timeout integer 1800
log_checkpoints_to_alert boolean FALSE
SQL> select ISSES_MODIFIABLE,ISSYS_MODIFIABLE,ISINSTANCE_MODIFIABLE,ISMODIFIED from v$parameter where name like'log_checkpoint_timeout';
ISSES_MODIFIABL ISSYS_MODIFIABLE ISINSTANCE_MODI ISMODIFIED
FALSE IMMEDIATE TRUE FALSE
SQL> alter system set log_checkpoint_timeout=0 scope=both;
System altered.
SQL> show parameter log_checkpoint_timeout;
NAME TYPE VALUE
log_checkpoint_timeout integer 0
3) Now setting fast_start_mttr_target
SQL> select ISSES_MODIFIABLE,ISSYS_MODIFIABLE,ISINSTANCE_MODIFIABLE,ISMODIFIED from v$parameter where name like'fast_start_mttr_target';
ISSES_MODIFIABL ISSYS_MODIFIABLE ISINSTANCE_MODI ISMODIFIED
FALSE IMMEDIATE TRUE FALSE
Setting the fast_mttr_target to 1200 = 20 minutes of checkpoint switching according to Oracle recommendation
Querying the v$instance_recovery view
4) SQL> select ACTUAL_REDO_BLKS,TARGET_REDO_BLKS,TARGET_MTTR,ESTIMATED_MTTR, OPTIMAL_LOGFILE_SIZE,CKPT_BLOCK_WRITES from v$instance_recovery;
ACTUAL_REDO_BLKS TARGET_REDO_BLKS TARGET_MTTR ESTIMATED_MTTR OPTIMAL_LOGFILE_SIZE CKPT_BLOCK_WRITES
276 165888 *93* 59 361 16040
Here Target Mttr was 93 so i set the fast_mttr_target to 120
SQL> alter system set fast_start_mttr_target=120 scope=both;
System altered.
Now the logfile size suggested by v$instance_recovery is 290 Mb
SQL> select ACTUAL_REDO_BLKS,TARGET_REDO_BLKS,TARGET_MTTR,ESTIMATED_MTTR, OPTIMAL_LOGFILE_SIZE,CKPT_BLOCK_WRITES from v$instance_recovery;
ACTUAL_REDO_BLKS TARGET_REDO_BLKS TARGET_MTTR ESTIMATED_MTTR OPTIMAL_LOGFILE_SIZE CKPT_BLOCK_WRITES
59 165888 93 59 290 16080
After altering the logfile size to 290 as show below by v$log view :-
SQL> select GROUP#,THREAD#,SEQUENCE#,BYTES from v$log;
GROUP# THREAD# SEQUENCE# BYTES
1 1 24 304087040
2 1 0 304087040
3 1 0 304087040
4 1 0 304087040
5 ) After altering the size i have observed the anomaly as redo log blocks to be applied for recovery has increased from *59 to 696* also now v$instance_recovery view is now suggesting the logfile size of *276 mb*. Have i misunderstood something
SQL> select ACTUAL_REDO_BLKS,TARGET_REDO_BLKS,TARGET_MTTR,ESTIMATED_MTTR, OPTIMAL_LOGFILE_SIZE,CKPT_BLOCK_WRITES from v$instance_recovery;
ACTUAL_REDO_BLKS TARGET_REDO_BLKS TARGET_MTTR ESTIMATED_MTTR OPTIMAL_LOGFILE_SIZE CKPT_BLOCK_WRITES
*696* 646947 120 59 *276* 18474
Please clarify the above output i am unable to optimize the logfile size and have not been able to achieve the goal of reducing the redo log blocks to be applied for recovery, any help is appreciated in this regard.sunny_123 wrote:
Sir oracle says that fast_start_mttr target can be set to 3600 = 1hour. As suggested by following oracle document
http://docs.oracle.com/cd/B10500_01/server.920/a96533/instreco.htm
I set mine value to 1200 = 20 minutes. Later i adjusted it to 120=2 minutes as Target_mttr suggested it to be around 100 (if fast_mttr_target value is too high or too low effective value is contained in target_mttr of v$instance_recovery)Just to add, you are reading the documentation of 9.2 and a lot has changed since then. For example, in 9.2 the parameter FSMTTR was introduced and explicitly required to be set and monitored by the DBA for teh additional checkpoint writes which might get caused by it. Since 10g onwards this parameter has been made automatically maintained by Oracle. Also it's been long that 9i has been desupported followed by 10g so it's better that you start reading the latest documentation of 11g and if not that, at least of 10.2.
Aman.... -
Log file switch (checkpoint not complete)
HI,
I am using Oracle 9.2 on rhel
IN the statspack report I am getting one of the event I.e log file switch (checkpoint not complete).Statspack duration is about 1.5 hrs...any suggestion
Instance Efficiency Percentages (Target 100%)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Buffer Nowait %: 99.97 Redo NoWait %: 98.31
Buffer Hit %: 95.84 In-memory Sort %: 100.00
Library Hit %: 99.57 Soft Parse %: 98.51
Execute to Parse %: 72.70 Latch Hit %: 99.71
Parse CPU to Parse Elapsd %: 53.15 % Non-Parse CPU: 99.10
Shared Pool Statistics Begin End
Memory Usage %: 93.66 93.74
% SQL with executions>1: 60.41 60.94
% Memory for SQL w/exec>1: 60.89 61.66
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~ % Total
Event Waits Time (s) Ela Time
log file switch (checkpoint incomplete) 35,936 35,100 42.81
enqueue 6,144 16,684 20.35
buffer busy waits 17,190 13,346 16.28
wait for a undo record 51,967 4,931 6.01
ARCH wait on SENDREQ 877 4,813 5.87
-------------------------------------------------------------Please find the whole stats[pack report
{code}
STATSPACK report for
DB Name DB Id Instance Inst Num Release Cluster Host
ICAI 1504443695 icai 1 9.2.0.8.0 NO icaidb.icai.
org
Snap Id Snap Time Sessions Curs/Sess Comment
Begin Snap: 70 04-Aug-10 14:27:14 162 34.7
End Snap: 73 04-Aug-10 15:30:43 254 55.4
Elapsed: 63.48 (mins)
Cache Sizes (end)
~~~~~~~~~~~~~~~~~
Buffer Cache: 4,928M Std Block Size: 8K
Shared Pool Size: 1,312M Log Buffer: 1,024K
Load Profile
~~~~~~~~~~~~ Per Second Per Transaction
Redo size: 96,260.76 53,769.94
Logical reads: 13,998.20 7,819.20
Block changes: 1,227.83 685.85
Physical reads: 592.13 330.76
Physical writes: 19.93 11.13
User calls: 313.12 174.91
Parses: 31.41 17.55
Hard parses: 0.47 0.26
Sorts: 11.61 6.49
Logons: 0.11 0.06
Executes: 115.04 64.26
Transactions: 1.79
% Blocks changed per Read: 8.77 Recursive Call %: 26.28
Rollback per transaction %: 5.43 Rows per Sort: 472.17
Instance Efficiency Percentages (Target 100%)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Buffer Nowait %: 99.97 Redo NoWait %: 98.31
Buffer Hit %: 95.84 In-memory Sort %: 100.00
Library Hit %: 99.57 Soft Parse %: 98.51
Execute to Parse %: 72.70 Latch Hit %: 99.71
Parse CPU to Parse Elapsd %: 53.15 % Non-Parse CPU: 99.10
Shared Pool Statistics Begin End
Memory Usage %: 93.66 93.74
% SQL with executions>1: 60.41 60.94
% Memory for SQL w/exec>1: 60.89 61.66
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~ % Total
Event Waits Time (s) Ela Time
log file switch (checkpoint incomplete) 35,936 35,100 42.81
enqueue 6,144 16,684 20.35
buffer busy waits 17,190 13,346 16.28
wait for a undo record 51,967 4,931 6.01
ARCH wait on SENDREQ 877 4,813 5.87
Wait Events for DB: ICAI Instance: icai Snaps: 70 -73
-> 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
log file switch (checkpoint 35,936 35,886 35,100 977 5.3
enqueue 6,144 5,660 16,684 2716 0.9
buffer busy waits 17,190 5,325 13,346 776 2.5
wait for a undo record 51,967 49,137 4,931 95 7.6
ARCH wait on SENDREQ 877 0 4,813 5489 0.1
log file switch (archiving n 3,705 3,653 3,600 972 0.5
db file sequential read 600,718 0 621 1 88.1
log file sync 6,826 140 561 82 1.0
log file parallel write 7,052 0 421 60 1.0
log buffer space 1,361 16 230 169 0.2
db file scattered read 289,115 0 212 1 42.4
switch logfile command 116 23 160 1377 0.0
wait for stopper event to be 1,924 1,111 123 64 0.3
control file parallel write 1,355 0 63 46 0.2
PX Deq: Txn Recovery Start 1,253 0 36 29 0.2
SQL*Net break/reset to clien 560 0 20 36 0.1
local write wait 18 15 17 918 0.0
log file switch completion 21 7 9 442 0.0
control file sequential read 237,021 0 6 0 34.8
log file sequential read 437 0 6 13 0.1
BFILE get length 297 0 2 7 0.0
latch free 485 67 2 4 0.1
BFILE read 1,023 0 1 1 0.2
log file single write 18 0 0 16 0.0
SQL*Net more data to client 13,785 0 0 0 2.0
process startup 10 0 0 9 0.0
control file single write 10 0 0 4 0.0
row cache lock 34 0 0 0 0.0
db file single write 1 0 0 14 0.0
LGWR wait for redo copy 89 0 0 0 0.0
PX Deq: Signal ACK 3 0 0 4 0.0
PX Deq: Join ACK 5 0 0 1 0.0
BFILE open 106 0 0 0 0.0
db file parallel read 25 0 0 0 0.0
async disk IO 1,383 0 0 0 0.2
db file parallel write 255 0 0 0 0.0
BFILE internal seek 1,023 0 0 0 0.2
direct path read 843 0 0 0 0.1
BFILE closure 106 0 0 0 0.0
undo segment extension 844 844 0 0 0.1
direct path write 96 0 0 0 0.0
SQL*Net message from client 1,188,764 0 445,926 375 174.3
virtual circuit status 125 125 3,660 29277 0.0
wakeup time manager 86 86 2,451 28506 0.0
PX Idle Wait 755 750 1,466 1941 0.1
jobq slave wait 60 60 176 2930 0.0
SQL*Net more data from clien 3,035 0 1 0 0.4
SQL*Net message to client 1,188,882 0 1 0 174.3
Wait Events for DB: ICAI Instance: icai Snaps: 70 -73
-> 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
Background Wait Events for DB: ICAI Instance: icai Snaps: 70 -73
-> ordered by wait time desc, waits desc (idle events last)
Avg
Total Wait wait Waits
Event Waits Timeouts Time (s) (ms) /txn
ARCH wait on SENDREQ 877 0 4,813 5489 0.1
buffer busy waits 2,164 1,176 1,184 547 0.3
log file parallel write 7,052 0 421 60 1.0
wait for stopper event to be 1,924 1,111 123 64 0.3
control file parallel write 1,301 0 57 44 0.2
enqueue 393 0 10 26 0.1
control file sequential read 234,452 0 6 0 34.4
log file sequential read 431 0 6 13 0.1
db file scattered read 124 0 1 10 0.0
log buffer space 40 0 1 13 0.0
log file single write 15 0 0 20 0.0
db file sequential read 20 0 0 9 0.0
process startup 7 0 0 8 0.0
latch free 19 3 0 2 0.0
LGWR wait for redo copy 89 0 0 0 0.0
PX Deq: Signal ACK 3 0 0 4 0.0
PX Deq: Join ACK 5 0 0 1 0.0
db file parallel write 255 0 0 0 0.0
async disk IO 793 0 0 0 0.1
rdbms ipc reply 1 0 0 0 0.0
direct path read 88 0 0 0 0.0
direct path write 88 0 0 0 0.0
rdbms ipc message 50,357 3,296 16,467 327 7.4
pmon timer 1,271 1,251 3,653 2874 0.2
smon timer 64 0 2,302 35963 0.0
SQL ordered by Gets for DB: ICAI Instance: icai Snaps: 70 -73
-> End Buffer Gets Threshold: 10000
-> Note that resources reported for PL/SQL includes the resources used by
all SQL statements called within the PL/SQL code. As individual SQL
statements are also reported, it is possible and valid for the summed
total % to exceed 100
CPU Elapsd
Buffer Gets Executions Gets per Exec %Total Time (s) Time (s) Hash Value
5,652,833 456 12,396.6 10.6 20.04 1062.67 285625578
SELECT /*+ INDEX(OT_DAK_ENTRY_DETL IDM_DED_NAME) */DEH_TXN_CODE
,DEH_NO FROM OT_DAK_ENTRY_HEAD,OT_DAK_ENTRY_DETL WHERE DEH_SY
S_ID = DED_DEH_SYS_ID AND TRUNC(DEH_APPLICATION_DT) = :b1 AND
DED_DAK_CODE = :b2 AND DED_NAME LIKE LTRIM(RTRIM(:b3)) || '%'
AND NVL(DED_INSTR_NO,'XXXXXX') = NVL(:b4,'XXXXXX') AND TRUNC(
5,096,348 189 26,964.8 9.6 23.64 23.25 1772835295
select decode(level,1,'',2,' ',3,' ',4,' ',5,'
', ' ') || decode(:1,'ENG',menu_option_desc,menu_opt
ion_desc_bl) "OPTION", menu_parent_id "PARENT", menu_action_type
"TYPE",menu_action "ACTION", decode(level,1,'',2,' ',3,' ',4,'
',5,' ', ' ') ||decode(menu_action_type, 'M', '+', 'o'
4,894,185 96 50,981.1 9.2 7.89 10.11 23088203
INSERT INTO OT_MEM_FEE_COL_DETL(MFCD_FEE_TYPE,MFCD_CONDON_FEE_YN
,MFCD_EXCESS_USED_YN,MFCD_CONDN_CODE,MFCD_PM_CODE,MFCD_CURR_CODE
,MFCD_INSTR_NO,MFCD_INSTR_DT,MFCD_AMT,MFCD_BANK_CODE,MFCD_INSTR_
TYPE,MFCD_BRANCH,MFCD_COLLECTION,MFCD_FM_DT,MFCD_TO_DT,MFCD_RES_
CODE,MFCD_CR_UID,MFCD_CR_DT,MFCD_UPD_UID,MFCD_UPD_DT,MFCD_CONDON
4,885,684 152 32,142.7 9.2 7.64 8.87 1007886847
SELECT MIN(MFCH_NO) FROM OT_MEM_FEE_COL_HEAD, OT_MEM_FEE_COL_DET
L WHERE MFCH_SYS_ID = MFCD_MFCH_SYS_ID AND MFCH_REF_NO = :B4 AND
MFCH_REF_TXN_CODE = :B3 AND MFCD_INSTR_NO = :B2 AND MFCD_BANK_C
ODE = :B1 AND MFCD_AMT > 0
2,680,356 446 6,009.8 5.0 95.57 125.49 197211170
SELECT /*+ INDEX(OT_STUDENT_FEE_COL_IPCC_HEAD OT_STUDENT_FEE_COL
IPCCHEAD_UK01) */SFCH_SYS_ID,SFCH_DT,DECODE(NVL(SSTN_SRN,SFCH
TEMPREF_NO),SSTN_SRN, NULL ,SFCH_TEMP_REF_NO) SFCH_TEMP_REF_NO
,NVL(SFCH_STUD_SRN,SSTN_SRN) SFCH_STUD_SRN,SFCH_COURSE_CODE,SFCH
SCHEMECODE,SFCH_EXMP_STUD_YN,SFCH_EXMP_STUD_REASON,DEH_APPLICA
2,288,204 1 2,288,204.0 4.3 54.31 59.36 3103356680
DECLARE job BINARY_INTEGER := :job; next_date DATE := :mydate;
broken BOOLEAN := FALSE; BEGIN BEGIN /*Quest SOO PPCM job */ qu
est_ppcm_snapshot_pkg.take_snapshot; END; :mydate := next_date;
IF broken THEN :b := 1; ELSE :b := 0; END IF; END;
2,253,877 1 2,253,877.0 4.2 52.70 56.21 579012758
DELETE FROM QUEST_PPCM_SQL_TEXT TXT WHERE INSTANCE_ID >= 0 AND N
OT EXISTS (SELECT 1 FROM QUEST_PPCM_SQL_SNAPSHOT SNAP WHERE SNAP
.SNAPSHOT_ID > 0 AND SNAP.INSTANCE_ID= TXT.INSTANCE_ID AND SNAP.
SQL_ID = TXT.SQL_ID)
1,656,006 24 69,000.3 3.1 10.00 24.26 4081782417
SELECT PISH_COURSE_CODE FROM OV_STU_PAYINSLIP_IPCC_DTL WHERE
PISH_BANK_CODE = :b1 AND PISH_NO BETWEEN :b2 AND :b3 AND PISD_
CURR_CODE = :b4 AND PISH_REGION_CODE = :b5 ORDER BY 1
SQL ordered by Gets for DB: ICAI Instance: icai Snaps: 70 -73
-> End Buffer Gets Threshold: 10000
-> Note that resources reported for PL/SQL includes the resources used by
all SQL statements called within the PL/SQL code. As individual SQL
statements are also reported, it is possible and valid for the summed
total % to exceed 100
CPU Elapsd
Buffer Gets Executions Gets per Exec %Total Time (s) Time (s) Hash Value
1,567,946 12 130,662.2 2.9 21.99 47.39 1585476974
SELECT NVL(TO_CHAR(A.DEH_APPLICATION_DT,'DD/MM/RRRR'), NULL ),NV
L(TO_CHAR(A.DEH_DT,'DD/MM/RRRR'), NULL ) FROM OT_DAK_ENTRY_HEA
D A,OT_DAK_ENTRY_DETL B,OT_FIRM_NAME_APPR_HEAD C WHERE A.DEH_SY
S_ID = B.DED_DEH_SYS_ID AND B.DED_DAK_SYS_ID = C.FNAH_DED_SYS_I
D AND C.FNAH_SYS_ID = (SELECT MAX(B.FNAH_SYS_ID) FROM OT_FIR
1,216,226 4 304,056.5 2.3 9.90 54.25 937031003
SELECT TRIM(STUD_SRN)
Q1_REGNO, TR
IM(STUD_TEMP_REF_NO)
Q1_TEMPNO, STUD_TITLE
1,138,801 178 6,397.8 2.1 18.13 1009.80 1617597
SELECT SRN,ACTIVITYDESCRIPTION,STATUS,DOCUMENTNO,DOCUMENTDATE FR
OM OV_ART_TRANS_STATUS WHERE (SRN=:1) order by DOCUMENTDATE
1,029,221 230 4,474.9 1.9 20.27 20.76 1838125769
SELECT MRH_DT,MRH_FIRST_NAME,MRH_MIDDLE_NAME,MRH_SUR_NAME,MRH_ST
ATUS FROM OM_MEM_REG_HEAD WHERE DECODE(:b1,1,MRH_MRN,MRH_MFCH
TEMPREF_NO) = :b2
778,949 52 14,979.8 1.5 20.32 21.85 4142254844
SELECT LTRIM(RTRIM(DECODE(TIT_NAME,'MR.','CA.','MS.','CA.','MRS.
','CA.') || ' ' || MRH_FIRST_NAME || ' ' || MRH_MIDDLE_NAME
|| ' ' || MRH_SUR_NAME || ' ' || DECODE(MRH_APPR_UID, NULL ,
NULL ,DECODE(MRH_MEM_STATUS,2, NULL ,DECODE(MRH_FELLOW_STATUS_YN
,'Y','FCA','ACA'))) || DECODE(MRH_RESI_STATUS,'A','
755,893 517 1,462.1 1.4 90.43 89.07 1033584013
SELECT DECODE(MFCD_FEE_TYPE,'M08',1,'M05',2,'M06',3,'M09',4,'M10
',5,'M11',6,'M12',7,'M07',8,'M13',9,'M14',10,'M15',11,'M04',12,'
M03',13,'M02',14,'M01',15,'M21',16,'M22',17,'M23',18,'EXCESS',19
,20) FEE_SEQ,MFCD_FEE_TYPE FEE_TYPE,SUM(MFCD_AMT) AMOUNT FROM
OT_MEM_FEE_COL_HEAD,OT_MEM_FEE_COL_DETL WHERE MFCH_SYS_ID = MFC
751,010 1,090 689.0 1.4 28.61 31.41 1734754400
SELECT ROWID,PIIPD_ICAI_EXAM_APPEARED,PIIPD_REG_NO,PIIPD_MTH,PII
PD_YR,PIIPD_ROLL_NO,PIIPD_EXT_EXAM_APPEARED,PIIPD_EXAM_CODE_1,PI
IPD_SUBJ_CODE_1,PIIPD_GROUP_1,PIIPD_ROLL_NO_1,PIIPD_LAST_PAPER_D
T_1,PIIPD_EXAM_CODE_2,PIIPD_SUBJ_CODE_2,PIIPD_GROUP_2,PIIPD_ROLL
SQL ordered by Reads for DB: ICAI Instance: icai Snaps: 70 -73
-> End Disk Reads Threshold: 1000
CPU Elapsd
Physical Reads Executions Reads per Exec %Total Time (s) Time (s) Hash Value
227,513 2 113,756.5 10.1 22.04 79.36 2837394537
SELECT STUD_SRN,STUD_FIRST_NAME,STUD_MIDDLE_NAME,STUD_MAIDEN_NAM
E,STUD_SURNAME,STUD_FATHER_NAME,STUD_BIRTH_DT,STUD_COMM_CODE,STU
D_SEX,STUD_HANDICAPPED_YN,STUD_HANDICAPPED_REASON,STUD_LANG_CODE
,STUD_NATIONALITY_CODE,STUD_EMAIL,STUD_PERMNT_ADDR_LINE_1,STUD_P
ERMNT_ADDR_LINE_2,STUD_PERMNT_ADDR_LINE_3,STUD_PERMNT_ADDR_LINE_
220,939 12 18,411.6 9.8 21.99 47.39 1585476974
SELECT NVL(TO_CHAR(A.DEH_APPLICATION_DT,'DD/MM/RRRR'), NULL ),NV
L(TO_CHAR(A.DEH_DT,'DD/MM/RRRR'), NULL ) FROM OT_DAK_ENTRY_HEA
D A,OT_DAK_ENTRY_DETL B,OT_FIRM_NAME_APPR_HEAD C WHERE A.DEH_SY
S_ID = B.DED_DEH_SYS_ID AND B.DED_DAK_SYS_ID = C.FNAH_DED_SYS_I
D AND C.FNAH_SYS_ID = (SELECT MAX(B.FNAH_SYS_ID) FROM OT_FIR
198,343 2 99,171.5 8.8 5.82 46.25 1414719916
UPDATE OM_MEM_REG_HEAD SET MRH_MRN=:b1 WHERE MRH_SYS_ID = :b2
198,343 2 99,171.5 8.8 5.81 46.10 1414796677
UPDATE OT_DAK_ACTV_HISTORY SET DAH_REG_NO = :B1 WHERE DAH_REG_NO
= :B3 AND TRUNC(DAH_ACTV_ED_DT ) <= TRUNC(:B2 ) AND DAH_ACTV_ST
ATUS = 'C'
173,892 2 86,946.0 7.7 13.85 16.34 3262067067
SELECT STUD_SRN,STUD_FIRST_NAME,STUD_MIDDLE_NAME,STUD_MAIDEN_NAM
E,STUD_SURNAME,STUD_FATHER_NAME,STUD_BIRTH_DT,STUD_COMM_CODE,STU
D_SEX,STUD_HANDICAPPED_YN,STUD_HANDICAPPED_REASON,STUD_LANG_CODE
,STUD_NATIONALITY_CODE,STUD_EMAIL,STUD_PERMNT_ADDR_LINE_1,STUD_P
ERMNT_ADDR_LINE_2,STUD_PERMNT_ADDR_LINE_3,STUD_PERMNT_ADDR_LINE_
112,038 9 12,448.7 5.0 9.23 10.14 2058267852
SELECT ROWID,STUD_DT,STUD_TXN_CODE,STUD_NO,STUD_AMD_NO,STUD_REF_
FROM,STUD_REF_TXN_CODE,STUD_REF_NO,STUD_TEMP_REF_NO,STUD_SRN,STU
D_TITLE,STUD_STATUS,STUD_FIRST_NAME,STUD_MIDDLE_NAME,STUD_SURNAM
E,STUD_MAIDEN_NAME,STUD_NAME_STATUS,STUD_FATHER_NAME,STUD_NATION
ALITY_CODE,STUD_NATION_PROOF_ENCL_YN,STUD_SEX,STUD_HANDICAPPED_Y
102,583 1 102,583.0 4.5 4.51 285.99 802587273
SELECT ROWID,DEH_DT,DEH_TXN_CODE,DEH_NO,DEH_AMD_NO,DEH_REF_FROM,
DEH_REF_TXN_CODE,DEH_REF_NO,DEH_REF_SYS_ID,DEH_REGION_CODE,DEH_A
PPLICATION_DT,DEH_DOC_STATUS,DEH_STATUS,DEH_PRINT_STATUS,DEH_CLO
STATUS,DEHSYS_ID,DEH_COMP_CODE,DEH_ACNT_YR,DEH_AMD_DT,DEH_AMD_
UID,DEH_AMD_RES_CODE,DEH_REF_FROM_NUM,DEH_CR_UID,DEH_CR_DT,DEH_U
98,825 3 32,941.7 4.4 6.70 6.66 2078892348
/*SELECT STUD_SRN
Q1_RE
GNO, O_GET_OLD_REG_NO(STUD_SRN, :BP_COURSE) OLD_NO, TIT_NAME||'
'||STUD_FIRST_NAME||' '||STUD_MIDDLE_NAME||' '||STUD_SURNAME
Q1_NAME, LTRIM(RTRIM(A.STUD_CORRES_ADDR_LINE_1 ))||DECO
96,187 2 48,093.5 4.3 10.78 16.53 3301514821
SELECT MFCD_PAYIN_SLIP_NO MFCD_PAYIN_SLIP_NO
, DECODE(MFCD_BANK_CODE ,'ICI',1,2) ICI_FIRST
, DECODE(MFCD_INSTR_TYPE,'S',1,'L
SQL ordered by Reads for DB: ICAI Instance: icai Snaps: 70 -73
-> End Disk Reads Threshold: 1000
CPU Elapsd
Physical Reads Executions Reads per Exec %Total Time (s) Time (s) Hash Value
',2,'O',3,4) TYPE_FIRST , MFCD_PAYIN_SLIP_DT , FM_BANK
.BANK_NAME , BAD_ADDR1 ADD1
80,683 4 20,170.8 3.6 9.90 54.25 937031003
SELECT TRIM(STUD_SRN)
Q1_REGNO, TR
IM(STUD_TEMP_REF_NO)
Q1_TEMPNO, STUD_TITLE
77,972 8 9,746.5 3.5 8.92 8.84 2241526944
SELECT ROWID,STUD_DT,STUD_TXN_CODE,STUD_NO,STUD_AMD_NO,STUD_REF_
FROM,STUD_REF_TXN_CODE,STUD_REF_NO,STUD_TEMP_REF_NO,STUD_SRN,STU
D_TITLE,STUD_STATUS,STUD_FIRST_NAME,STUD_MIDDLE_NAME,STUD_SURNAM
E,STUD_MAIDEN_NAME,STUD_NAME_STATUS,STUD_FATHER_NAME,STUD_NATION
ALITY_CODE,STUD_NATION_PROOF_ENCL_YN,STUD_SEX,STUD_HANDICAPPED_Y
75,667 3 25,222.3 3.4 3.34 25.09 3345305231
SELECT DISTINCT SFCH_STUD_SRN FROM OT_STUDENT_FEE_COL_HEAD A,O
T_STUDENT_FEE_COL_DETL B WHERE B.SFCD_SFCH_SYS_ID = A.SFCH_SYS_
ID AND B.SFCD_INSTR_BANK_CODE = :b1 AND B.SFCD_INSTR_NO = :b2
72,658 52 1,397.3 3.2 20.32 21.85 4142254844
SELECT LTRIM(RTRIM(DECODE(TIT_NAME,'MR.','CA.','MS.','CA.','MRS.
','CA.') || ' ' || MRH_FIRST_NAME || ' ' || MRH_MIDDLE_NAME
|| ' ' || MRH_SUR_NAME || ' ' || DECODE(MRH_APPR_UID, NULL ,
NULL ,DECODE(MRH_MEM_STATUS,2, NULL ,DECODE(MRH_FELLOW_STATUS_YN
,'Y','FCA','ACA'))) || DECODE(MRH_RESI_STATUS,'A','
48,619 3 16,206.3 2.2 4.19 4.11 496772197
SELECT ROWID,STUD_DT,STUD_TXN_CODE,STUD_NO,STUD_AMD_NO,STUD_REF_
FROM,STUD_REF_TXN_CODE,STUD_REF_NO,STUD_TEMP_REF_NO,STUD_SRN,STU
D_TITLE,STUD_STATUS,STUD_FIRST_NAME,STUD_MIDDLE_NAME,STUD_SURNAM
E,STUD_MAIDEN_NAME,STUD_NAME_STATUS,STUD_FATHER_NAME,STUD_NATION
ALITY_CODE,STUD_NATION_PROOF_ENCL_YN,STUD_SEX,STUD_HANDICAPPED_Y
48,063 230 209.0 2.1 20.27 20.76 1838125769
SELECT MRH_DT,MRH_FIRST_NAME,MRH_MIDDLE_NAME,MRH_SUR_NAME,MRH_ST
ATUS FROM OM_MEM_REG_HEAD WHERE DECODE(:b1,1,MRH_MRN,MRH_MFCH
SQL ordered by Executions for DB: ICAI Instance: icai Snaps: 70 -73
-> End Executions Threshold: 100
CPU per Elap per
Executions Rows Processed Rows per Exec Exec (s) Exec (s) Hash Value
38,614 38,614 1.0 0.00 0.00 1741347688
SELECT SYSDATE FROM SYS.DUAL
12,490 12,488 1.0 0.00 0.00 2614155871
SELECT DECODE(:b1,'L',DECODE(:b2,'ENG',STATUS_NAME,STATUS_BL_NAM
E),DECODE(:b2,'ENG',STATUS_SHORT_NAME,STATUS_BL_SHORT_NAME)) STA
TUS_DESC,STATUS_FRZ_FLAG_NUM FROM OM_STATUS WHERE STATUS_CODE
= :b4
8,629 8,628 1.0 0.00 0.00 1644340447
SELECT DECODE(:b1,'L',DECODE(:b2,'ENG',FEE_TYPE_NAME,FEE_TYPE_BL
NAME),DECODE(:b2,'ENG',FEETYPE_SHORT_NAME,FEE_TYPE_BL_SHORT_NA
ME)) FEE_NAME,FEE_TYPE_FRZ_FLAG_NUM FROM OM_FEE_TYPE WHERE FE
E_TYPE_CODE = :b4
7,275 7,272 1.0 0.00 0.34 3716207873
update seq$ set increment$=:2,minvalue=:3,maxvalue=:4,cycle#=:5,
order$=:6,cache=:7,highwater=:8,audit$=:9,flags=:10 where obj#=:
1
6,293 6,283 1.0 0.00 0.00 2804237544
SELECT DECODE(:b1,'L',DECODE(:b2,'ENG',CITY_NAME,CITY_BL_NAME),D
ECODE(:b2,'ENG',CITY_SHORT_NAME,CITY_BL_SHORT_NAME)) CITY_NAME,C
ITY_TALUK_CODE,CITY_DIST_CODE,CITY_STATE_CODE,CITY_REGION_CODE,C
ITY_FRZ_FLAG_NUM FROM OM_CITY WHERE CITY_CODE = :b4
6,221 6,221 1.0 0.00 0.00 484036617
SELECT DAH_SYS_ID.NEXTVAL FROM DUAL
6,221 6,221 1.0 0.00 0.00 2945494810
SELECT COUNT(DAH_SYS_ID) FROM OT_DAK_ACTV_HISTORY WHERE DAH_ACTV
TYPE = :B2 AND DAHTXN_SYS_ID = :B1
5,979 5,979 1.0 0.00 0.00 35936114
SELECT STUD_DOC_STATUS FROM OM_STUDENT_HEAD WHERE STUD_SYS_ID
= :b1
4,637 4,637 1.0 0.00 0.00 1237293873
SELECT DECODE(:b1,'L',DECODE(:b2,'ENG',COU_NAME,COU_BL_NAME),DEC
ODE(:b2,'ENG',COU_SHORT_NAME,COU_BL_SHORT_NAME)) COU_NAME,COU_FR
Z_FLAG_NUM FROM OM_COUNTRY WHERE COU_CODE = :b4
4,404 1,276 0.3 0.00 0.00 1829426463
SELECT NVL(TAU_FROM_VALUE,0), NVL(TAU_TO_VALUE,0) FROM IM_TXN_AU
TH_USER WHERE TAU_TA_TYPE = :B3 AND TAU_TXN_CODE = :B2 AND TAU_A
UTH_UID = :B1
4,220 4,220 1.0 0.00 0.00 1006906503
UPDATE OT_DAK_ACTV_HISTORY SET DAH_ACTV_ED_DT = :B3 , DAH_ACTV_S
TATUS = 'C' WHERE DAH_ACTV_TYPE = :B2 AND DAH_TXN_SYS_ID = :B1
3,874 66 0.0 0.00 0.00 4284733339
SELECT TIT_NAME ||' '|| AR_FIRST_NAME||' '||AR_MIDDLE_NAME||' '|
|AR_SUR_NAME FROM OT_ARTICLE_REGISTRATION, OM_TITLE WHERE TRIM(A
SQL ordered by Executions for DB: ICAI Instance: icai Snaps: 70 -73
-> End Executions Threshold: 100 -
Accidently Deleted Online Redo Log Files
Dear friends
Just to give a try, I deleted online redo log files from the disk after clearn shutdown (In Test Environment Not A Production Database), then i started the dabase, I know we need atleast two online redo files for database to work properly. now my point of question is how can i create new online redo files ?
I have 2 redo logfile groups each with one member. In group 2 i have added new member for the deleted one using add logfile member ....... to group 2. but when i try todo the same to add logfile member to group1 I am not abale to do so. because its saying that this is the current logfile member. then I tried manual log switching to use next logfile member but database is not allowing as the database is just mounted not opened. plsease if any body helps me out to sort out this problem it will be a great help.
Anandkumar S.M
Oracle DBA
rC6Exv3hello ur instruction u have is some what bit rite. but i was not able to solve the problem
finally i solved the problem with these commands after database is mounted
recover database until cancel Enter
then I select the cancel option when it provide the user with the options
after cancelling the recover i issued the following command
alter database open resetlogs;
this method sorted out my problem
anyway very very thanks for ur root hints from where i got the Idea to recover online redo logfiles
Thank u very much -
RAC 10.2.0.4, event gc cr block busy & log file switch
hello everybody,
i would like to know if there is any dependencies between gc cr block busy and log switch in the one node of the rac cluster.
i had a select and its completion time lasted 12 secs instead of 1, the start time of the select is the start time of the log switch on the node.
But when i looked into the active session history the session which was standing for that select had been waiting gc cr block busy instead log file switch completion.
While looking to the Google resources i ve noticed that "The gc current block busy and gc cr block busy wait events indicate that the
remote instance received the block after a remote instance processing delay.
In most cases, this is due to a log flush".
I would be really greatfull if anybody would be able to locate the initial dependancy i ve mantioned and explain the cause of the issue as i can not quite get why the selection took so long.
Thank you in advance!Did you told "log file switch"?
you mean log file switch (checkpoint incomplete) or log file switch (archiving needed) or log file switch/archive or log file switch (clearing log file) or log file switch completion or log switch/archive
however a instance can wait ... if you find high values about waiting, you may tune your database.
please show us
- Top 5 Wait Events
SQL> alter session set nls_date_format='YYYY/MM/DD HH24:MI:SS';
SQL> select name, completion_time from V$ARCHIVED_LOG order by completion_time ;
Check How often do you switch logfile to archive log? ... Every switch log file... you may find "log file switch" waiting
I see... you no high DML activitiy.
But Please check High segment + object and query on AWR report... (example: Segments by Physical Writes )
just investigate
Good Luck -
Log file switch (archiving needed)
Hi,
My database is on windows 2003, 10.2.0.4, recently I have been getting the following wait events on a regular basis, LOG FILE SWITCH (ARCHIVING NEEDED)...My redo files are 50MB with 5 groups...I have changed the log_archive_max_process from 2 to 3, but still the problem persists...can anyone help me regarding the same?As to what other changes can be done?and this happens only during the time of BOD and EOD.
Thanks,
AJHi Jonathan,
Thanks for the reply, I am not worried abt the archiving thing for the time being,as my database was working absolutely fine before the new query that was added in the Begin of Day process. So I am trying to tweak the query.
Folllowing is the procedure which gets called during the Begin of Day:
CREATE OR REPLACE procedure Lms_Pr_Bod_Update_Tmp (p_import_type in number)
as
v_update_script varchar2(2000);
v_upper_start_tag varchar2(10); -- san_22-apr-2009
v_upper_end_tag varchar2(10); -- san_22-apr-2009
begin
declare
cursor cur_update_tmp is
select -- this query is for all of lov type of data
a.destination_column_name, a.column_to_update , b.mapped_lov_syscode lov_syscode,
c.destination_table_name,'LOV_DATA_SYSCODE' select_attribute,'LMS_LOV_DATA_MAP' select_table,
'SOURCE_UNIQUE_ID' where_condition,'LOV_SYSCODE' lov_condition,'LOV' att_type
from lms_import_column_info a
inner join lms_attribute_master b
on a.attribute_syscode = b.attribute_syscode
and (a.column_to_update is not null or trim(a.column_to_update) = '')
inner join lms_import_type_master c
on a.import_type_syscode = c.import_type_syscode
where a.import_type_syscode = p_import_type
and b.mapped_lov_syscode is not null
union all
select -- this query is for all of dummy attribute
a.destination_column_name, a.column_to_update , 1 lov_syscode,
d.destination_table_name,c.attribute_name_internal select_attribute,
case
when b.applicable_for = 'INS' then 'LMS_ENTITY_INSTRUMENT'
when b.applicable_for = 'ACC' then 'LMS_ENTITY_ACCOUNT'
end case,
b.attribute_name_internal where_condition,'1' lov_condition,'DUMMY' att_type
from lms_import_column_info a
inner join lms_attribute_master b
on a.attribute_syscode = b.attribute_syscode
and (a.column_to_update is not null and trim(a.column_to_update) <> ' ')
and b.attribute_type = 'DUM' and dummy_column_type = 'FILT'
inner join lms_attribute_master c
on b.dummy_mapped_attribute_pk = c.attribute_syscode
inner join lms_import_type_master d
on a.import_type_syscode = d.import_type_syscode
where a.import_type_syscode = p_import_type;
begin
v_upper_start_tag := 'UPPER('; -- san_22-apr-2009
v_upper_end_tag := ')'; -- san_22-apr-2009
for cr_update_tmp in cur_update_tmp loop
if p_import_type = 4 and cr_update_tmp.column_to_update IN ('INSTRUMENT_SYSCODE','ACCOUNT_SYSCODE')
and Upper(cr_update_tmp.destination_table_name) = 'LMS_ENTITY_TRANSACTION_TMP' then
v_upper_start_tag := ''; -- san_22-apr-2009
v_upper_end_tag := ''; -- san_22-apr-2009
end if;
v_update_script := 'UPDATE ' || cr_update_tmp.destination_table_name || ' A SET ' || ' A.' || cr_update_tmp.column_to_update || ' =
(select ' || CR_UPDATE_TMP.SELECT_ATTRIBUTE || ' from ' || CR_UPDATE_TMP.SELECT_TABLE || '
where ' || V_UPPER_START_TAG || CR_UPDATE_TMP.WHERE_CONDITION || V_UPPER_END_TAG || '=' || V_UPPER_START_TAG || CR_UPDATE_TMP.DESTINATION_COLUMN_NAME || V_UPPER_END_TAG ||
' AND ' || cr_update_tmp.lov_condition || ' = ' || cr_update_tmp.lov_syscode || ')';
v_upper_start_tag := 'UPPER('; v_upper_end_tag := ')';
execute immediate (v_update_script);
end loop;
end;
end;
Following is the flow of the query:
1. A temporary table is created where in the updates can be made.
2. Rows are inserted into ths table from the source table
3. Updates are performed on this table
4. Updates are then copied to the source table
5. This procedure is alled twice, so before getting called for the second time, table is truncated.
Thanks,
AJ
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