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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Diagnose Slow System
Barb,
Trace a slow session, choosing carefully when you start and stop data collection to include *only* user response time. As I showed in the example on the "I/O EVENTS" thread earlier on this list, this trace data will give you what you need to prove whether or not you have the network issue you think you have.
Cary Millsap
Hotsos Enterprises, Ltd.
cary.millsap_at_hotsos.com
http://www.hotsos.com
-----Original Message-----
Barbara
Sent: Thursday, May 23, 2002 5:13 PM
To: Multiple recipients of list ORACLE-L
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_WAITEDAVERAGE_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) P1P2
---- ------ ---------- -------- -------- -------- -------------- ---------- ---- 16 19 latch free WAITING 0 0 214751987659
HORT TIM
E
565 31 latch free WAITING 0 0 2147519876
59
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 -------------------------------------------------------------------- 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-LReceived on Thu May 23 2002 - 18:18:28 CDT
(or the name of mailing list you want to be removed from). You may
also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Cary Millsap INET: cary.millsap_at_hotsos.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).
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