Oracle-L: Re: Oracle Performance Tuning steps

From: Yechiel Adar <adar76_at_inter.net.il>
Date: Thu, 27 Jun 2002 06:48:21 -0800
Message-ID: <F001.0048A548.20020627064821@fatcity.com>

Based on 30 years of working with developers, I think that you should check what changed in the application. Do not accept: We did not change anything, because more often then not it is:
We did not change anything, EXCEPT ....

Yechiel Adar
Mehish

Original Message ----- From: Chetan To: Multiple recipients of list ORACLE-L Sent: Wednesday, June 26, 2002 12:18 PM Subject: Oracle Performance Tuning steps

Hi guys ,

Need some help. Actually we are looking here at a Oracle 8.1.7 db on HP-UNIX. The application was running fine uptil yesterday. Suddenly a part of the appln is running extremely slow. I can not figure what might be the problem. Wanted to track this down asap.

Here is some information about the db.

Database size - 20GB

Optimizer - CHOOSE

Disk Structure - RAID 1+0

No. of processors - 4

Block Size - 8K

Archivelog mode : ARCHIVELOG

Please tell me what should be the ideal way I should try to trace the problem. I thought of running UTLBSTAT/UTLESTAT or STATSPACK and asked the user to run that part of the appln. Has anybody worked with STATSPACK before ?

Can anybody tell me what should accurate and fastest way to hunt down the problem ? I think its something to do with indexes or changes in the queries.

Also can someone tell me the ideal backup strategy for this database considering the fact that it's a 24x7 system.

Thanks in advance .

Chetan Chindarkar

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Author: Yechiel Adar
INET: adar76_at_inter.net.il

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