Database very slow/hangs.

Hello,
My company server has a database of size 400GB. It has has been distributed on 2 HDD of 300GB each. Previously i had faced the problem of database performing very slow . That time the size of the database was much shorter & i just moved the REDOLOG FILE to other HDD using rename command. That worked & again the database was working great. But now the scenario is quite different than previous... as given below ...
Tablespace Name - LHSERP
No. Of. Datafiles in LHSERP Tablespace - 55 ( Which are distributed on 2 HDD )
Hard Disk Drive (HDD) in server - 2
Capacity of HDD - 300GB each.now both HDD has datafiles from LHSERP tablespace. I tried to move the redo log files to other HDD but no use. No improvement in the performance. Still the database is slow.
One more thing i need to make a point of , when i see the task manager on the server it shows some RED and GREEN color graph of CPU usage. Does it mean anything serious ???? Even the whole OS works quite slow on the server. Right from opening MY COMPUTER , to loging into the user ....to fire the query in the user ...everything is very slow. Should i try to short out this problem in some different direction ???
Can you suggest me what to do next ... to improve database performance. If you have anymore ideas please let me know.
ORACLE DATABASE 10g
Windows Server 2008 64-Bit
Thanks in advance ....

Hi,
What is your AWR snapshot keep time? I normally set it to 30 days so that in case of some problem, i can compare my AWR with my history AWRs. Now, can you take out an AWR when your database was doing good and then the latest AWR and then compare it and see what is the difference? Is redo log generation has increased? What are the top 5 wait events in the good AWR report and now in current bad AWR report. What are the top SQLs (elapsed time, CPU time) in good and bad AWR. What were the top segments in bad and good AWRs.
Doing this will give you insight of the problematic area.
Can you check ADDM report, is oracle recommending you anything t o look into?
what is the CPU usage. Even Oracle is the top consumer, can you check the CPU usage for past 24 hours, is it touching 100 %?
You should have OEM configured with the database. Form OEM, can you check host hard disks performance and check the busy percentage of your hard disks for past one month and check if there was any increase in the hard disk busy rate.
Doing all above will certainly help you identify the problematic area.
Salman

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Database is getting and running very slow

Hi All,
I am working with a bank.
Our PROD database gets hang everytime and we have restart the database everytime whenever it gets hung.
Whenever we run EOD, It takes 18 hrs to complete.
Database version: 9.2.0.4
I have pasted statspack report below.
Snap Id Snap Time Sessions Curs/Sess Comment
Begin Snap: 105 07-Jun-11 14:19:01 268 16.7
End Snap: 106 07-Jun-11 14:22:56 290 17.5
Elapsed: 3.92 (mins)
Cache Sizes (end)
~~~~~~~~~~~~~~~~~
Buffer Cache: 3,072M Std Block Size: 8K
Shared Pool Size: 400M Log Buffer: 5,120K
Load Profile
~~~~~~~~~~~~ Per Second Per Transaction
Redo size: 113,840.43 11,452.27
Logical reads: 13,517.63 1,359.86
Block changes: 734.60 73.90
Physical reads: 4,553.60 458.09
Physical writes: 22.31 2.24
User calls: 137.71 13.85
Parses: 176.87 17.79
Hard parses: 5.42 0.54
Sorts: 33.91 3.41
Logons: 1.93 0.19
Executes: 395.18 39.75
Transactions: 9.94
% Blocks changed per Read: 5.43 Recursive Call %: 89.13
Rollback per transaction %: 72.82 Rows per Sort: 19.67
Instance Efficiency Percentages (Target 100%)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Buffer Nowait %: 99.50 Redo NoWait %: 100.00
Buffer Hit %: 66.31 In-memory Sort %: 100.00
Library Hit %: 98.48 Soft Parse %: 96.94
Execute to Parse %: 55.24 Latch Hit %: 99.03
Parse CPU to Parse Elapsd %: 82.12 % Non-Parse CPU: 95.73
Shared Pool Statistics Begin End
Memory Usage %: 94.76 95.87
% SQL with executions>1: 49.23 50.37
% Memory for SQL w/exec>1: 55.86 57.57
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~ % Total
Event Waits Time (s) Ela Time
db file scattered read 105,673 610 37.94
db file sequential read 64,554 604 37.55
SQL*Net message from dblink 822 115 7.15
CPU time 114 7.09
buffer busy waits 15,554 78 4.83
Wait Events for DB: FCRLIVE Instance: fcrlive Snaps: 105 -106
-> 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 105,673 0 610 6 45.2
db file sequential read 64,554 0 604 9 27.6
SQL*Net message from dblink 822 0 115 140 0.4
buffer busy waits 15,554 0 78 5 6.7
db file parallel write 310 0 44 143 0.1
log file sync 1,070 3 39 37 0.5
log file parallel write 1,052 1,052 2 2 0.5
latch free 728 567 1 1 0.3
control file parallel write 76 0 1 8 0.0
direct path read (lob) 14 0 0 25 0.0
SQL*Net more data to client 12,222 0 0 0 5.2
db file parallel read 1 0 0 8 0.0
SQL*Net break/reset to clien 44 0 0 0 0.0
control file sequential read 112 0 0 0 0.0
SQL*Net message to dblink 822 0 0 0 0.4
SQL*Net more data from dblin 71 0 0 0 0.0
undo segment extension 36 35 0 0 0.0
SQL*Net message from client 25,539 0 54,417 2131 10.9
wakeup time manager 8 8 240 30000 0.0
SQL*Net more data from clien 1,602 0 0 0 0.7
SQL*Net message to client 25,569 0 0 0 10.9
Background Wait Events for DB: FCRLIVE Instance: fcrlive Snaps: 105 -106
-> ordered by wait time desc, waits desc (idle events last)
Avg
Total Wait wait Waits
Event Waits Timeouts Time (s) (ms) /txn
db file parallel write 310 0 44 143 0.1
log file parallel write 1,048 1,048 2 2 0.4
control file parallel write 75 0 1 8 0.0
db file sequential read 38 0 0 2 0.0
latch free 3 0 0 1 0.0
control file sequential read 52 0 0 0 0.0
rdbms ipc reply 3 0 0 0 0.0
db file scattered read 1 0 0 0 0.0
buffer busy waits 1 0 0 0 0.0
rdbms ipc message 5,131 2,539 1,856 362 2.2
smon timer 2 1 463 ###### 0.0
pmon timer 86 86 226 2623 0.0
Please help me on this.
Thanks and Regards,
Jatin

Hi,
Thanks for the response.
Apologies for the late response.
We made changes in parameter file,after which the db is not getting hang.
but still its very slow.
db_buffer_cache---3Gb changed to 6 Gb
shared_pool_size---400MB changed to 600MB
log_buffer--5MB changed to 218MB.
Please find the statspack report below.
STATSPACK report for
DB Name DB Id Instance Inst Num Release Cluster Host
FCRLIVE 822947670 fcrlive 1 9.2.0.4.0 NO zanacoret
Snap Id Snap Time Sessions Curs/Sess Comment
Begin Snap: 117 07-Jun-11 20:57:36 26 1.8
End Snap: 118 08-Jun-11 03:14:10 33 29.6
Elapsed: 376.57 (mins)
Cache Sizes (end)
~~~~~~~~~~~~~~~~~
Buffer Cache: 3,072M Std Block Size: 8K
Shared Pool Size: 400M Log Buffer: 5,120K
Load Profile
~~~~~~~~~~~~ Per Second Per Transaction
Redo size: 560,384.15 157,618.29
Logical reads: 26,085.91 7,337.14
Block changes: 2,926.34 823.09
Physical reads: 1,312.97 369.30
Physical writes: 100.81 28.35
User calls: 14.18 3.99
Parses: 9.16 2.58
Hard parses: 0.33 0.09
Sorts: 53.39 15.02
Logons: 0.06 0.02
Executes: 801.72 225.50
Transactions: 3.56
% Blocks changed per Read: 11.22 Recursive Call %: 98.72
Rollback per transaction %: 2.77 Rows per Sort: 18.85
Instance Efficiency Percentages (Target 100%)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Buffer Nowait %: 99.95 Redo NoWait %: 100.00
Buffer Hit %: 94.99 In-memory Sort %: 100.00
Library Hit %: 99.89 Soft Parse %: 96.43
Execute to Parse %: 98.86 Latch Hit %: 99.29
Parse CPU to Parse Elapsd %: 5.68 % Non-Parse CPU: 99.80
Shared Pool Statistics Begin End
Memory Usage %: 20.38 74.21
% SQL with executions>1: 52.84 35.47
% Memory for SQL w/exec>1: 38.38 37.80
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~ % Total
Event Waits Time (s) Ela Time
db file sequential read 6,369,437 38,718 44.15
db file scattered read 1,848,969 12,195 13.91
CPU time 9,859 11.24
db file parallel write 27,841 6,544 7.46
log file sync 17,603 6,286 7.17
Wait Events for DB: FCRLIVE Instance: fcrlive Snaps: 117 -118
-> 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 sequential read 6,369,437 0 38,718 6 79.3
db file scattered read 1,848,969 0 12,195 7 23.0
db file parallel write 27,841 0 6,544 235 0.3
log file sync 17,603 4,321 6,286 357 0.2
log buffer space 18,192 689 6,040 332 0.2
buffer busy waits 319,377 13 1,992 6 4.0
enqueue 1,094 422 1,339 1224 0.0
SQL*Net break/reset to clien 412 0 1,144 2776 0.0
db file parallel read 143,728 0 1,123 8 1.8
SQL*Net message from dblink 1,698,780 0 1,043 1 21.1
log file parallel write 81,639 81,332 364 4 1.0
direct path write 7,869 0 339 43 0.1
library cache pin 215 103 309 1438 0.0
latch free 74,864 73,409 117 2 0.9
log file switch completion 289 33 66 227 0.0
library cache load lock 132 14 49 374 0.0
control file parallel write 7,633 0 46 6 0.1
local write wait 175 14 23 130 0.0
SQL*Net more data to client 166,226 0 4 0 2.1
direct path read 7,674 0 3 0 0.1
sort segment request 1 1 1 1000 0.0
log file single write 96 0 1 9 0.0
SQL*Net message to dblink 1,698,780 0 0 0 21.1
undo segment extension 1,172,153 1,172,094 0 0 14.6
control file sequential read 3,474 0 0 0 0.0
LGWR wait for redo copy 705 6 0 0 0.0
L1 validation 2 2 0 10 0.0
log file sequential read 96 0 0 0 0.0
row cache lock 8 0 0 0 0.0
SQL*Net more data to dblink 7 0 0 0 0.0
SQL*Net more data from dblin 13 0 0 0 0.0
buffer deadlock 281 275 0 0 0.0
SQL*Net message from client 278,244 0 377,492 1357 3.5
wakeup time manager 712 712 21,268 29870 0.0
SQL*Net message to client 278,253 0 0 0 3.5
SQL*Net more data from clien 10,186 0 0 0 0.1
Background Wait Events for DB: FCRLIVE Instance: fcrlive Snaps: 117 -118
-> ordered by wait time desc, waits desc (idle events last)
Avg
Total Wait wait Waits
Event Waits Timeouts Time (s) (ms) /txn
db file parallel write 27,841 0 6,544 235 0.3
log buffer space 7,410 91 1,407 190 0.1
log file parallel write 81,639 81,332 364 4 1.0
control file parallel write 7,633 0 46 6 0.1
rdbms ipc reply 535 0 36 66 0.0
direct path write 936 0 9 10 0.0
db file scattered read 593 0 6 10 0.0
db file sequential read 573 0 2 3 0.0
buffer busy waits 88 0 1 12 0.0
log file single write 96 0 1 9 0.0
direct path read 936 0 1 1 0.0
control file sequential read 3,416 0 0 0 0.0
latch free 34 18 0 3 0.0
LGWR wait for redo copy 705 6 0 0 0.0
log file sequential read 96 0 0 0 0.0
rdbms ipc message 4,131,462 220,177 141,132 34 51.4
pmon timer 7,573 7,573 22,050 2912 0.1
smon timer 197 61 21,406 ###### 0.0
SQL ordered by Gets for DB: FCRLIVE Instance: fcrlive Snaps: 117 -118
-> 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
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-> Note that resources reported for PL/SQL includes the resources used by
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-> Note that resources reported for PL/SQL includes the resources used by
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SELECT NVL(sum(amt_txn*instr('C',cod_drcr))-sum(amt_txn*instr('D
',cod_drcr)),0.00) from ch_nobook where cod_acct_no = :b2 and
dat_post < :b1
Latch Name Where Misses Sleeps Sleeps
cache buffers chains kcbgtcr: kslbegin excl 0 44,053 43,307
cache buffers chains kcbrls: kslbegin 0 26,416 28,168
cache buffers chains kcbzsc 0 1,189 1
cache buffers chains kcbzwb 0 942 704
cache buffers chains kcbchg: kslbegin: bufs not 0 637 418
cache buffers chains kcbgcur: kslbegin 0 527 876
cache buffers chains kcbget: exchange rls 0 185 99
cache buffers chains kcbget: exchange 0 123 133
cache buffers chains kcbzib: multi-block read: 0 73 0
cache buffers chains kcbget: pin buffer 0 45 136
cache buffers chains kcbzgb: scan from tail. no 0 45 0
cache buffers chains kcbnew 0 28 2
cache buffers chains kcbbxsv 0 27 7
cache buffers chains kcbgtcr: fast path 0 24 173
cache buffers chains kcbgtcr 0 15 0
cache buffers chains kcbzib: finish free bufs 0 12 63
cache buffers chains kcbgtcr: kslbegin shared 0 9 5
cache buffers chains kcbchg: kslbegin: call CR 0 9 274
cache buffers chains kcbnlc 0 3 12
cache buffers lru chain kcbbiop: lru scan 1,028 80 0
cache buffers lru chain kcbzgb: multiple sets nowa 33,462 20 4
cache buffers lru chain kcbzgb: posted for free bu 684 10 121
cache buffers lru chain kcbbxsv: move to being wri 86 9 3
cache buffers lru chain kcbgtcr:CR Scan:KCBRSKIP 191 7 0
cache buffers lru chain kcbbwlru 59 2 0
cache buffers lru chain kcbzar: KSLNBEGIN 11,844 2 0
checkpoint queue latch kcbbxsv: move to being wri 0 9 0
checkpoint queue latch kcbbwthc: thread checkpoin 0 7 0
checkpoint queue latch kcbswcu: Switch buffers 0 2 17
enqueue hash chains ksqcnl 0 6 5
enqueue hash chains ksqrcl 0 2 1
enqueues ksqdel 0 3 5
enqueues ksqgel: create enqueue 0 2 0
library cache kglpnc: child 0 13 18
library cache kgllkdl: child: cleanup 0 8 0
library cache kglupc: child 0 5 9
library cache kglpndl: child: before pro 0 5 2
library cache kglhdgn: child: 0 2 2
library cache kglpnp: child 0 1 0
library cache pin kglupc 0 3 5
library cache pin kglpnc: child 0 3 1
multiblock read objects kcbzib: normal mbr free 0 2 1
redo allocation kcrfwr 0 73 73
redo allocation kcrfwi: before write 0 1 1
row cache enqueue latch kqreqd 0 1 0
row cache objects kqrpfl: not dirty 0 15 3
row cache objects kqrpre: find obj 0 6 18
shared pool kghupr1 0 3 4
shared pool kghalp 0 1 0
simulator lru latch kcbs_simulate: simulate se 0 6 6
simulator lru latch kcbs_lookup_setid 0 3 3
undo global data ktudba: KSLBEGIN 0 3 3
Latch Miss Sources for DB: FCRLIVE Instance: fcrlive Snaps: 117 -118
-> only latches with sleeps are shown
-> ordered by name, sleeps desc
NoWait Waiter
Latch Name Where Misses Sleeps Sleeps
Parent Latch Statistics DB: FCRLIVE Instance: fcrlive Snaps: 117 -118
-> only latches with sleeps are shown
-> ordered by name
Get Spin &
Latch Name Requests Misses Sleeps Sleeps 1->4
enqueues 1,911,942 22,454 5 22449/5/0/0/
0
multiblock read objects 4,388,310 1,031 2 1029/2/0/0/0
row cache enqueue latch 13,604,407 5,954 1 5953/1/0/0/0
Child Latch Statistics DB: FCRLIVE Instance: fcrlive Snaps: 117 -118
-> only latches with sleeps/gets > 1/100000 are shown
-> ordered by name, gets desc
Child Get Spin &
Latch Name Num Requests Misses Sleeps Sleeps 1->4
cache buffers chains 3239 21,505,400 1,236,249 7,795 0/0/0/0/0
cache buffers chains 3237 19,299,145 993,997 8,120 0/0/0/0/0
cache buffers chains 3240 17,488,734 801,663 5,679 0/0/0/0/0
cache buffers chains 3236 16,609,145 741,070 4,516 0/0/0/0/0
cache buffers chains 3242 16,161,488 677,717 3,572 0/0/0/0/0
cache buffers chains 3789 15,643,256 238,442 4,976 0/0/0/0/0
cache buffers chains 3241 15,352,438 615,755 3,499 0/0/0/0/0
cache buffers chains 2945 14,634,929 545,294 3,155 0/0/0/0/0
cache buffers chains 510 13,117,914 455,313 1,994 0/0/0/0/0
cache buffers chains 2947 12,685,566 419,997 1,589 0/0/0/0/0
cache buffers chains 3238 12,591,861 408,182 1,501 0/0/0/0/0
cache buffers chains 505 10,012,850 242,906 1,055 0/0/0/0/0
cache buffers chains 511 9,979,520 244,777 1,078 0/0/0/0/0
cache buffers chains 2948 9,094,481 199,262 822 0/0/0/0/0
cache buffers chains 2185 9,045,926 209,522 924 0/0/0/0/0
cache buffers chains 2944 8,677,071 191,854 832 0/0/0/0/0
cache buffers chains 509 8,649,454 184,191 757 0/0/0/0/0
cache buffers chains 508 6,868,267 112,615 414 0/0/0/0/0
cache buffers chains 504 6,431,407 101,195 356 0/0/0/0/0
cache buffers chains 2946 6,006,960 96,807 273 0/0/0/0/0
cache buffers chains 2179 5,924,037 93,867 490 0/0/0/0/0
cache buffers chains 2180 5,057,947 66,453 344 0/0/0/0/0
cache buffers chains 507 4,638,543 57,389 172 0/0/0/0/0
cache buffers chains 2181 3,465,838 16,960 100 0/0/0/0/0
cache buffers chains 2186 3,255,441 29,094 142 0/0/0/0/0
cache buffers chains 3398 3,124,434 33,454 213 0/0/0/0/0
cache buffers chains 1593 2,908,993 558 117 0/0/0/0/0
cache buffers chains 3504 2,673,360 25,420 215 0/0/0/0/0
cache buffers chains 1177 2,424,271 298 56 0/0/0/0/0
cache buffers chains 506 2,421,918 14,566 81 0/0/0/0/0
cache buffers chains 1753 1,600,842 197 20 0/0/0/0/0
cache buffers chains 2182 1,556,688 8,232 28 0/0/0/0/0
cache buffers chains 1529 1,513,006 392 40 0/0/0/0/0
cache buffers chains 2183 1,488,352 7,325 61 0/0/0/0/0
cache buffers chains 2184 1,470,530 7,835 38 0/0/0/0/0
cache buffers chains 3590 946,240 276 29 0/0/0/0/0
cache buffers chains 3606 911,872 292 11 0/0/0/0/0
Can we find the top 10 sql statement in AWR report.
Please suggest.
Thanks and Regards,
Jatin

OAS 4.0.7 on SUSE Linux 6.1 gets very slow or hangs

Hallo out there,
we installed OAS 407 on a SUSE Linux 6.1 system with ORACLE
Server 8.0.5.0.0. After long time solving installation problems,
we are now able to start OAS via the OAS-Manager html page.
And we are able to launch a simple PL/SQL-application, which
produces the output of a system table. Now, the thing is, that we
can start this application once or twice or maybe a few times
more but then the system hangs or gets very slow, so that only a
hard reboot of the server machine works.
We configured the NR_TASKS parameter in tasks.h to get ulimit to
512 for the user processes. System seemed to work better then,
but maybe only a little bit better.
We have also got problems with domain-names and node-names, which
sometimes are just machinename, then machinename.domainname, then
again machinename.badister.(none) .
If there is anyone out there who has got the same problems or
solved them, please tell me.
Ralf
null

I have wasted a lot of time trying to get OAS 4.0.7 to run with
a 2.2 kernel... it doesn't work, even after you've fixed all the
problems like to ps command for example, the listeners hang. I
now have it working on a 2.0 kernel, which is reasonably stable,
although I have to do a reboot every few days!
Michael Seiwert (guest) wrote:
: Hi,
: I have a problem with installing the OAS 4.0.7 on my SuSE 6.2
: System. The 8i Database works fine.
: 1. When I try to start oasctl start & it complains about my ps
: utils ... Threads not shown etc. ..
: 2. What have to be done to run the Database Browser in
: DBUtilities ?
: Logger Tables, PLSQL Catridge ... are installed!
: 3. How could I check with a little PL/SQL Application that
: the OAS works ??
: 4. I've heard about a patch on "oracle-ftp.oracle.com"
: /patchset/internet/linux/oas40701-patch..
: Maybe this patch solves my problems ???
: I hope someone could help me with my problems!!!
: Thank you very much!
: Micha
null

Database is very slow

Hi Guys,
I am geting trouble. My database is very slow. I couldn't log in when I launch enterprise manager. I use sqlplus to login on as sys, and it was ok, but it was very slow when I select from v$lock. It is fast when I select from v$session. How can I fix? How can know what database is doing? Thanks.

It is been fixed by our consultant. The reason is memery shortage. The consultant company didn't tell us much more. Thank you guys. Now I checked my system, in v$session_wait view, there are 3 buffer busy waits events there, and in P2Text column, there is a value "Block#". I checked the view of V$waitstat, the result like
data block 4234 1259059
undo header 68169 6811160
is there problem?
in v$system_envents like
EVENT TOTAL_WAITS TOTAL_TIMEOUTS TIME_WAITED AVERAGE_WAIT TIME_WAITED_MICRO
buffer busy waits 72994 72950 7953083 109 7,9531E+10
when I select from v$lock, it took long time, finally I cancelled. I coun't use enterprise manager to expand instance tree to see the sessio, very slow and like hang. What's problem? How do I fix it?

I recently bought, from the original website of Adobe, Photoshop elements 13. However, when I go with my mouse pointer over the menu, It hangs or he works very slow. Does anyone have an idea how I can fix it? I have already downloaded updates, both from A

I recently bought, from the original website of Adobe, Photoshop elements 13. However, when I go with my mouse pointer over the menu, It hangs or he works very slow. Does anyone have an idea how I can fix it? I have already downloaded updates, both from Adobe and Windows. I have a new pc with window 8.1.

It could be a coincidence, but I rebooted the machine and (knock on wood) PSE13 seems to be working ok.

I have a Presario SR5450F. Recently, it is very slow to boot up. It hangs up on the Compaq screen

I have a Presario SR5450F. Recently, it is very slow to boot up. It hangs up on the Compaq screen (Setup, Boot Menu, System Recovery, Diagnostics). It hangs up on that screen for at least 10 minutes, which is unacceptable. It just started doing this. Can someone please help me? Thanks.
This question was solved.
View Solution.

You're welcome goldcanyon1
Glad I could help. Thanks for sharing your problem and what device was causing it for you. Sometimes having too many USB devices can cause problems. Your camera might work if only the mouse and keyboard are connected. It is worth a try if you need to get photos from it. I have seen even on my custom built PC occasional "odd" issues that can arise from having a variety of different USB devices connected.
Don't forgot to say thanks by giving "Kudos" to those that help solve your problems.
When a solution is found please mark the post that solves your issue.

Database performance is very slow

Hi DBA's
Plz help me out !!!
Application users complaining database performance is very slow. Its an 10g DB in IBM AIx Server.
Any changes needed pls be post as soon as possible
Buffer Cache Hit Ratio 94.69
Chained Row Ratio 0
Database CPU Time Ratio 17.21
Database Wait Time Ratio 82.78
Dictionary Cache Hit Ratio 99.38
Execute Parse Ratio -25.6
Get Hit Ratio 70.62
Latch Hit Ratio 99.65
Library Cache Hit Ratio 99.43
Parse CPU to Elapsed Ratio 8.4
Pin Hit Ratio 81.6
Soft-Parse Ratio 94.29
=====================================
NAME TYPE VALUE
cursor_sharing string EXACT
cursor_space_for_time boolean FALSE
nls_currency string
nls_dual_currency string
nls_iso_currency string
open_cursors integer 600
optimizer_secure_view_merging boolean TRUE
session_cached_cursors integer 20
sql92_security boolean FALSE
===========================================================
lock_sga boolean FALSE
pre_page_sga boolean FALSE
sga_max_size big integer 4272M
sga_target big integer 4G
pga_aggregate_target big integer 2980M
Total Ram Size is 8 GB

SQL> select username,sid from v$session where username='WPCPRODUSR';
USERNAME SID
WPCPRODUSR 378
WPCPRODUSR 379
WPCPRODUSR 380
WPCPRODUSR 381
WPCPRODUSR 382
WPCPRODUSR 383
WPCPRODUSR 384
WPCPRODUSR 385
WPCPRODUSR 386
WPCPRODUSR 387
WPCPRODUSR 388
USERNAME SID
WPCPRODUSR 389
WPCPRODUSR 390
WPCPRODUSR 391
WPCPRODUSR 392
WPCPRODUSR 393
WPCPRODUSR 394
WPCPRODUSR 395
WPCPRODUSR 396
WPCPRODUSR 397
WPCPRODUSR 398
WPCPRODUSR 399
USERNAME SID
WPCPRODUSR 400
WPCPRODUSR 401
WPCPRODUSR 402
WPCPRODUSR 403
WPCPRODUSR 404
WPCPRODUSR 405
WPCPRODUSR 406
WPCPRODUSR 407
WPCPRODUSR 408
WPCPRODUSR 409
WPCPRODUSR 410
USERNAME SID
WPCPRODUSR 411
WPCPRODUSR 412
WPCPRODUSR 413
WPCPRODUSR 414
WPCPRODUSR 415
WPCPRODUSR 416
WPCPRODUSR 417
WPCPRODUSR 418
WPCPRODUSR 419
WPCPRODUSR 420
WPCPRODUSR 421
USERNAME SID
WPCPRODUSR 422
WPCPRODUSR 423
WPCPRODUSR 424
WPCPRODUSR 425
WPCPRODUSR 426
WPCPRODUSR 427
WPCPRODUSR 428
WPCPRODUSR 429
WPCPRODUSR 430
WPCPRODUSR 431
WPCPRODUSR 432
USERNAME SID
WPCPRODUSR 433
WPCPRODUSR 434
WPCPRODUSR 435
WPCPRODUSR 436
WPCPRODUSR 437
WPCPRODUSR 438
WPCPRODUSR 439
WPCPRODUSR 440
WPCPRODUSR 441
WPCPRODUSR 442
WPCPRODUSR 443
USERNAME SID
WPCPRODUSR 444
WPCPRODUSR 445
WPCPRODUSR 446
WPCPRODUSR 447
WPCPRODUSR 448
WPCPRODUSR 449
WPCPRODUSR 450
WPCPRODUSR 451
WPCPRODUSR 452
WPCPRODUSR 453
WPCPRODUSR 454
USERNAME SID
WPCPRODUSR 455
WPCPRODUSR 456
WPCPRODUSR 457
WPCPRODUSR 458
WPCPRODUSR 459
WPCPRODUSR 460
WPCPRODUSR 461
WPCPRODUSR 462
WPCPRODUSR 463
WPCPRODUSR 464
WPCPRODUSR 465
USERNAME SID
WPCPRODUSR 466
WPCPRODUSR 467
WPCPRODUSR 468
WPCPRODUSR 469
WPCPRODUSR 470
WPCPRODUSR 471
WPCPRODUSR 472
WPCPRODUSR 473
WPCPRODUSR 474
WPCPRODUSR 475
WPCPRODUSR 476
USERNAME SID
WPCPRODUSR 477
WPCPRODUSR 478
WPCPRODUSR 479
WPCPRODUSR 480
WPCPRODUSR 481
WPCPRODUSR 482
WPCPRODUSR 483
WPCPRODUSR 484
WPCPRODUSR 485
WPCPRODUSR 486
WPCPRODUSR 487
USERNAME SID
WPCPRODUSR 488
WPCPRODUSR 489
WPCPRODUSR 490
WPCPRODUSR 491
WPCPRODUSR 492
WPCPRODUSR 493
WPCPRODUSR 494
WPCPRODUSR 495
WPCPRODUSR 496
WPCPRODUSR 497
WPCPRODUSR 498
USERNAME SID
WPCPRODUSR 499
WPCPRODUSR 500
WPCPRODUSR 501
WPCPRODUSR 502
WPCPRODUSR 503
WPCPRODUSR 504
WPCPRODUSR 505
WPCPRODUSR 506
WPCPRODUSR 507
WPCPRODUSR 508
WPCPRODUSR 509
USERNAME SID
WPCPRODUSR 510
WPCPRODUSR 511
WPCPRODUSR 512
WPCPRODUSR 513
WPCPRODUSR 514
WPCPRODUSR 515
WPCPRODUSR 516
WPCPRODUSR 517
WPCPRODUSR 518
WPCPRODUSR 519
WPCPRODUSR 520
USERNAME SID
WPCPRODUSR 521
WPCPRODUSR 522
WPCPRODUSR 523
WPCPRODUSR 524
WPCPRODUSR 525
148 rows selected.

Help.....Help......Help....My database is not posting records has got very slow.

What to do know.
My database has got very slow.
Repeatedly I am getting 12571 error in UDUMP
FATAL ERROR IN TWO-TASK SERVER: error = 12571
*** 2002.06.29.15.44.23.992
ksedmp: internal or fatal error
No current SQL statement being executed.
----- Call Stack Trace -----
No operator is able to post any records.
What to do, Please Help.
Sumeet

What to do know.
My database has got very slow.
Repeatedly I am getting 12571 error in UDUMP
FATAL ERROR IN TWO-TASK SERVER: error = 12571
*** 2002.06.29.15.44.23.992
ksedmp: internal or fatal error
No current SQL statement being executed.---->please notice this line why no any SQL statement is executing
----- Call Stack Trace -----
No operator is able to post any records.
What to do, Please Help.
Sumeet

When i start my hot backup my database getting very slow

Hi,
I am using following commands for enabling hot backup
SQL>ALTER SYSTEM ARCHIVE LOG CURRENT;
SQL>ARCHIVE LOG LIST;
SQL >ALTER DABATBASE BEGIN BACKUP;
Database altered.
SQL>SELECT FILE#,STATUS FROM V$BACKUP;
FILE# STATUS
1 ACTIVE
2 ACTIVE
3 ACTIVE
4 ACTIVE
and using cp -rp command to copy the file (backup copying speed good) but database performance very slow
How to improve performance ...
Regards
Vignesh C

Uwe Hesse wrote:
It is very likely that you experience slow performance with ALTER DATABASE BEGIN BACKUP , because until you do ALTER DATABASE END BACKUP , every modified block is additionally written into the online logfiles . Doesn't that happen only the first time the block is modified?
>
The command was introduced for split mirror backups, when this period is very short. Else ALTER TABLESPACE ... BEGIN/END BACKUP for every tablespace one at a time reduces the amount of additional redo during non-RMAN Hot Backup. There appear to be only 4 files. We don't know how big or sparse they are.
>
RMAN doesn't need that at all - much less redo - and also archive - generation then.
Furthermore, you can use BACKUP AS COMPRESSED BACKUPSET DATABASE to decrease the size of the backup even more - if space is an issue.
In short: Use RMAN :-)
Agree with that! Unless the copy is actually going to an NFS mount or something, where I would be concerned whether it is the type of NFS that Oracle likes. I'd also advise a current patch set, as the OP didn't tell us the exact version, and I have this nagging unfocused memory of some compression problems of the "oh, I can't recover" variety.
I'd like to see some evidence on I/O and cpu usage before giving advice. When I used to copy files like this, it would choke out everyone else. RMAN was a savior, but had to wait for local SAN upgrade.

Time Machine not backing up. Very slow, essentially hanging. I have 10.7.5 Mac OS X Lion (11G63). I have put in all updates. I tried to put my folders into "private" in the Spotlight (b/c I read that might be the problem). Still not working.

Time Machine not backing up. Very slow, essentially hanging. I have 10.7.5 Mac OS X Lion (11G63). I have put in all updates. I tried to put my folders into "private" in the Spotlight (b/c I read that might be the problem). Still not working.
Thanks in advance for any help!

For all things Time Machine see Pondini's excellent information here...
http://pondini.org/OSX/Home.html
Start at Troubleshooting.

5800 XM - very slow and hangs

For no apparent reason my 5800XM froze and I had to remove the battery to restart. After that it has been working but has become very slow, you can see the different applications open and close and a little "button" goes red or green and flashing for a few seconds before applications open or close. Sometimes it hangs, especially after incoming calls, but can be restarted by the powerbutton. At other times the buttons in the touchscreen hangs when I press them, producing gazillions of the same letter or number in the screen.
I tried to check for my firmware (?) version by dialing *#0000#, but I get an error message, so I don't know my version.
Can anyone help?

It's not about having much on your card or not.
I've seen it happen a few times with the 5800 and other models where a slightly corrupt memory card will cause the phone to run very slowly. The solution to that is to format or replace the card.
If you are certain that the card isn't the cause try these codes. If the first one doesn't help it try the second. You enter them like dialing a phone number. Be sure to back up anything you want to keep as the second code will fully reset the phone and remove all of your data from the phones memory.
Reset to factory defaults (*#7780#) : Restores settings but preserves user data (photos, 3rd party apps etc)
Reset (*#7370#) : This reformats completely the C: drive. All applications and files stored on this drive will be lost and clean default files will be rewritten.
Message Edited by psychomania on 06-May-2009 02:43 PM

Database is very slow in oracle 9i with Suse Linux

Hello All,
We are using Suse linux and installed Oracle 9i on it. Our ERP product is running on this database. It is very slow. But linux configuration seems Ok. Oracle's performance is very slow. But The same thing is working fast in oracle 8.1.6 and 8.1.7. Is there any special linux configuration parameters should we consider for this or we have to do something in init.ora file?. I added the size of the JAVA_POOL_SIZE, SHARED_POOL_SIZE and LARGE_POOL_SIZE to 300 MB each.
Thanks in advance and expecting your reply.
with regards,
sivababu

Which version of SuSE Linux would possibly help here. I'm using version 7.3 Pro and it is only 10 minutes slower than my installation on XP Pro (the script is 16 pages long and takes 8,000,000 records and converts them into 30,000 records of useful information-takes 20 minutes in XP, 30 minutes in SuSE 7.3 on a personal computer). I used the orarun9i script and followed the directions for re-compiling the genclntsh from the SuSE installations online.

Database very slow/hangs.

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