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Home -> Community -> Mailing Lists -> Oracle-L -> Re: Diagnose Slow System
Barb,
Can you take a BSTAT/ESTAT while the problem is occurring? Run the
"utlbstat.sql" script from SVRMGRL and then 15-25 mins later run "utlestat.sql" from SVRMGRL. It's actually pretty important the "utlestat.sql" be run from SVRMGRL and not SQL*Plus. Please do this atleast once during the periods of slowness -- more than once if possible...
Then, FTP the "report.txt" file(s) up to your PC and then browse to the http://www.oraperf.com site. Use the file-selection browse button at one of the upload sections to find one of the "report.txt" files and click "upload". The YAPP report will be produced automagically...
What the YAPP report will do is give a great "top->down" breakdown of where the system has been spending the majority of what the end-user community perceives as "response time" during the 15-25 mins of your BSTAT/ESTAT sample. In brief, the database is either working or waiting. If you like, you could email me the "report.txt" file and I'll look through the YAPP report alongside you...
There are some papers online at www.oraperf.com/whitepapers.htm which should explain the YAPP methodology (written by Anjo) and also another paper about using YAPP with STATSPACK. The latter paper largely applies to BSTAT/ESTAT also...
>From these reports, we should be able to get a pretty good idea of what is
going on...
Thanks!
-Tim
> List:
> We've been fighting problems for several days. I've sort of overwhelmed
> myself with data, but I don't know what any of it means.
>
> Solaris 2.6, Oracle 8.0.5, MTS
> Users complain of extreme slowness. No errors in alert, no trace files
> generated.
> Database is bounced every day. I capture wait statistics each day before
> the database goes down. The statistics from v$system_event for enqueue
> waits has gone up considerably since the problems started last Wednesday.
> But when I look at v$lock (I'm using Steve Adams' enqueue_locks.sql
> scripts), nothing pops up.
>
> Any ideas where I should start looking? I would appreciate any help.
> (I really believe this is a connectivity (networking) issue, but don't
know
> how to confirm this)
> Thanks!
> Barb
>
> (accumulted since last night at 11:00 pm)
>
>
> EVENT TOTAL_WAITS TOTAL_TIMEOUTS TIME_WAITED
> AVERAGE_WAIT
> --------------------------- ----------- -------------- -----------
> ------------
> latch free 814316 4064 106360
> 130612686
> enqueue 147 26 12033
> 81.8571429
> free buffer waits 4 0 23
> 5.75
> buffer busy waits 2959 0 567
> 19161879
> log file parallel write 68177 0 78788
> 1.155639
> log file sync 66683 1 77517
> 1.16247019
> db file sequential read 1385334 0 144617
> 104391432
> db file scattered read 1113301 0 142545
> 12803815
>
>
> (The info captured below is unusual. running this repeatedly normally
shows
> nothing
> except smon TS resource wait)
>
>
> RESOURCE NSID SID HOLDING WANTING SECONDS
> -------------------- ----- ---- ------- ------- ----------
> RT-1-0 4 LGWR X 0
> TM-1949-0 46 46 SX 0
> TM-1999-0 423 423 SX 4
> 46 46 SX 0
> TM-2014-0 46 46 SX 0
> TM-2106-0 46 46 SX 0
> TM-2218-0 46 46 SX 0
> TM-2270-0 423 423 SX 4
> TM-2275-0 423 423 SX 4
> 46 46 SX 0
> TS-1-8388610 6 SMON SX 48069
> TX-1114154-43605 46 46 X 0
> TX-852064-43554 423 423 X 4
>
>
> (Below is also unusual. Running this repeatedly normally returns no rows)
>
>
> Sess Ser Wait Wait Time W'd So
> ID No Event State W'd (ms) Far (ms) P1
P2
> P3
> ---- ------ ---------- -------- -------- -------- -------------- ---------
-
> ----
> 16 19 latch free WAITING 0 0 2147519876
59
> 0
> 92 38 latch free WAITED S -1 0 2147519876
59
> 0
> HORT TIM
> E
>
> 565 31 latch free WAITING 0 0 2147519876
59
> 0
> 636 11604 latch free WAITED S -1 0 2147519876
59
> 0
> HORT TIM
> E
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Baker, Barbara
> INET: bbaker_at_denvernewspaperagency.com
>
> Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
> San Diego, California -- Public Internet access / Mailing Lists
> --------------------------------------------------------------------
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-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Tim Gorman INET: Tim_at_SageLogix.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Thu May 23 2002 - 21:38:22 CDT
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