RE: Slow performance/response

From: Nelson, Allan <anelson_at_miswaco.com>
Date: Tue, 29 Jun 2004 15:04:25 -0500
Message-ID: <7E0DB3A126BA9146AC30744E2B7E42459742E2@midhouhqxch01.net.smith.com>

Sounds like you should be able to read the whole table in the original 30 minutes. How about a query plan=3F

Allan

-----Original Message-----

=46rom: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Leroy Kemnitz Sent: Tuesday, June 29, 2004 1:51 PM
To: oracle-l_at_freelists.org
Subject: Slow performance/response

All -

I have not done tuning a great deal so bear with me. I currently have a

table that consists of 10 million rows - warehouse. The largest table I

have. A few months ago a query took around 30 minutes to run against=20 this table. This was acceptable. Now the query takes almost 5 hours!!!

The db is 9.2.0.4 running on aix 5.2. I have stats that I ran on the

db during the query run and it shows the db working but not maxed out.=20 The tablespace is at 75% used, not seeing waits. There is alot of disk=20 reads. No disk sorts. I am seeing a high 'Physical Blks per Read %'=20 but I am attrbiuting that to the datafiles being on one disk. I do plan

on rearranging them after the query finishes and hope this helps.

I am looking for other ideas of what could be wrong with the table or=20 places to look. I will continue to search for ideas at metalink and in=20 the books.

Lee

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Received on Tue Jun 29 2004 - 15:03:05 CDT