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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Slow performance/response
Leroy
Can you post your query? Are there any indexes on this table? Have you used EXPLAIN PLAN on this query?
Dennis Williams
DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com
I said it "looked" clear - Riddick
-----Original Message-----
From: 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 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. The tablespace is at 75% used, not seeing waits. There is alot of disk reads. No disk sorts. I am seeing a high 'Physical Blks per Read %' 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 places to look. I will continue to search for ideas at metalink and in the books.
Lee
FAQ is at http://www.freelists.org/help/fom-serve/cache/1.htmlput 'unsubscribe' in the subject line.
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