RE: Performance Problem

Was it always slow ?
Are you monitoring specifics jobs ? If so, have you run tkprof your main SQL statements ?

When running, what are the main ressources Oracle is waiting on ?

Have you monitor from the OS ? Are you IO bound or CPU bound ?

Cost base optimiser in 805 is not as good as on 8i or 9i.

Stephane Paquette
Administrateur de bases de donnees
Database Administrator
Standard Life
www.standardlife.ca
Tel. (514) 499-7999 7470 and (514) 925-7187 stephane.paquette_at_standardlife.ca <mailto:stephane.paquette_at_standardlife.ca>

-----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

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Author: Burton, Laura
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Author: Stephane Paquette
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