Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Mailing Lists -> Oracle-L -> RE: Slow performance/response

RE: Slow performance/response

From: DENNIS WILLIAMS <DWILLIAMS_at_LIFETOUCH.COM>
Date: Tue, 29 Jun 2004 13:52:22 -0500
Message-ID: <0186754BC82DD511B5C600B0D0AAC4D607B008FA@EXCHMN3>


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



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

To unsubscribe send email to: oracle-l-request_at_freelists.org put 'unsubscribe' in the subject line.
--

Archives are at http://www.freelists.org/archives/oracle-l/
FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html

-----------------------------------------------------------------
----------------------------------------------------------------
Please see the official ORACLE-L FAQ: http://www.orafaq.com
----------------------------------------------------------------
To unsubscribe send email to: oracle-l-request_at_freelists.org
put 'unsubscribe' in the subject line.
--

Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html
Received on Tue Jun 29 2004 - 13:53:25 CDT

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US