RE: AIX 4.3.3 / 8.1.7 & Timed Statistics & Tuning Question

[Deshpande, Kirti]

Title: AIX 4.3.3 / 8.1.7 & Timed Statistics & Tuning Question

Lisa,

 We have several databases on AIX 4.3.3/8.1.7.x. All of them have TIMED_STATISTICS set to TRUE.

 Not problems have been encountered.

 

 And about that tuning question: May be those are all dedicated connections, if so check what's set for SORT_AREA_SIZE at the instance level, may be there are other non-Oracle processes (application daemons etc.) that are memory bound. And if no one is complaining, and all tasks are completed in an acceptable time frame, you can just collect 'baseline' data for future reference, when the 'database' is at fault ;)

 

 HTH,

 

- Kirti

 -----Original Message-----
From: Koivu, Lisa [mailto:[EMAIL PROTECTED]]
Sent: Thursday, February 06, 2003 8:24 AM
To: Multiple recipients of list ORACLE-L
Subject: AIX 4.3.3 / 8.1.7 & Timed Statistics & Tuning Question

Good morning everyone -

Quick poll for those of you on 8.1.7 and AIX 4.3.3: 

Do you have TIMED_STATISTICS = true?  Have you encountered any problems with it?

The databases I inherited have this set false all over the place, hence my tuning efforts are really limited.  However I don't want to change it without checking around first.

And a tuning question:

This environment (peoplesoft) is very very low on memory.  When the app servers and databases are up there's less than 50MB of memory free.  Adding hardware is not a choice here.

The databases have 100MB set for the SGA.  It really looks like not much thought went into some of the parm settings. 

What I've read about tuning says that you must have a goal in mind.  Well, afaik nothing is "broken", nothing is suffering - then again, no one really paid much attention to Oracle.  It was up, fine, move on.  Am I on the wrong path if my goal for tuning is to figure out if I can reduce the size of the SGA and redo logs without adversely affecting performance?

Any comments are appreciated.  Thanks everyone

Lisa Koivu
Oracle Dingbat Administrator
Fairfield Resorts, Inc.
5259 Coconut Creek Parkway
Ft. Lauderdale, FL, USA  33063
Office: 954-935-4117 
Fax:    954-935-3639
Cell:    954-683-4459