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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Performance Problem
To speed up the application, you have to know where the time is spent.
Initial estimates can be made based on V$SESSION_WAIT and V$SESSION_EVENT
for
the application sessions, but to go really deep, you need a detailed
performance
analysis, based on timings and waits produced by the event 10046, level 8.
Level 1
for that event is otherwise known as "SQL Trace". Oracle8 cannot analyze the
output
from the 10046, so you'll have to contact Cary Milsap
(http://www.hotsos.com).
You should also run BSTAT/ESTAT reports and see the report produced (sorry,
no
statspack for V8.0) as well as carefully monitor your OS.
--
Mladen Gogala
Oracle DBA
-----Original Message-----
Burton, Laura
Sent: Monday, August 25, 2003 4:49 PM
To: Multiple recipients of list ORACLE-L
We currently have an application we are trying to speed up. In researching rule/cost based optimizers, I read that the cost based optimizer was the way to go (although rule had its moments) because that is where Oracle would be focusing any upgrades, enhancements, etc.
So I analyzed all tables and indexes. It brought our application to a stand still!! I then deleted the statistics and the application ran like before...slow. I know that I must have missed something although it seemed so straight forward. I verified that all tables were analyzed because I read that this would cause an extra step if all the tables were not analyzed.
The database is Oracle 8.0.5. This weekend I will be upgrading to 8.1.7. The operating system is NT 4.0. Does anyone know something that could point me in the right direction? Thank you for your help.
Laura
--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: Burton, Laura
INET: BurtonL_at_frmaint.com
Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting servicesto: 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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Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: Mladen Gogala
INET: mladen_at_wangtrading.com
Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting servicesto: 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 Mon Aug 25 2003 - 16:14:39 CDT
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