RE: Database Performance Question

From: Deshpande, Kirti <kirti.deshpande_at_verizon.com>
Date: Tue, 29 Jan 2002 08:27:27 -0800
Message-ID: <F001.003FED4A.20020129082026@fatcity.com>

You have done very nicely so far in tuning those joins... but... More questions to you :

1. Why do you think this is still a database problem? 
2. Will partitioning those larger tables help the queries? 
3. What have you checked to make sure that the bottleneck is not the

web-server?
4. Are these connections persistent or the app connects/disconnects when accessing the database?

Looking for answers to these questions may help you locate other opportunities to improve upon..

Kirti

-----Original Message-----
Sent: Tuesday, January 29, 2002 9:25 AM
To: Multiple recipients of list ORACLE-L

Hello all:

We have an application that is having slow response time against an 8i database, I would like to improve the response time. This is a web based application accessing the database with about 2000 users. Most of the application queries are based on complex joins on 4 big tables with each having over 5 million rows( biggest table has 18 million rows). I have tuned the Package queries for the best explain plan possible, but still do not seem to make dramatic change in the response time. Though, I was able to make significant headway tuning these packages by bringing down response times from 7 minutes to under 3 minutes. But this is not an acceptable response time from a web-application perspective.

I am considering creating data cubes based on the most frequently used join conditions and pre-populate them on a nightly basis or use triggers to update the cube simultaneously.
I am hoping that this enhance the response times.

I would greatly appreciate your suggestions or opinions on this idea. If you have an alternative/better way of achiving this please enlighten me.

Thank very much.
Srini Rajendran.

--

Please see the official ORACLE-L FAQ: http://www.orafaq.com
--

Author:
INET: SRAJENDRAN_at_nlfs.com

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).
--

Please see the official ORACLE-L FAQ: http://www.orafaq.com
--

Author: Deshpande, Kirti
INET: kirti.deshpande_at_verizon.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------