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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Performance Degradation/anomaly?
Ed, try looking in the v$session_wait to see what is the session waiting
for.
That should give you a hint on what might be going on. If you cannot find
anything in the database, check OS, swapping, paging, CPU, queues on the
disk
drives etc....
-----Original Message-----
Sent: Friday, April 13, 2001 2:07 PM
To: Multiple recipients of list ORACLE-L
Greetings all,
This is more of a tuning question. We have a pl/sql procedure doing inserts and updates to a very large table. This procedure process different groups of same types of data sequentially. The difference between these groups is with the volume of raw data.
When the procedure gets to process a large dataset (large volume), the performance slows significantly. However, it will speed up when it gets to process a smaller dataset.
The clincher: If I was to terminate and re-start the procedure the performance picks up for the same large dataset. It behave as though the buffer is "full" and the re-start seems to clear the buffer or any "cow webs" from previous session.
The procedure has been tuned. The target table has recently been defragmented. No other processes running concurrently.
We suspect the database needs tuning but do not know how to proceed. What should we be looking for? I am hoping to get suggestions on what to do to tune the DB. Appreciate any feedback.
Thanks very much,
Ed
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).
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 Fri Apr 13 2001 - 15:56:45 CDT
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