RE: Slow performance/response
- From: "Nelson, Allan" <anelson@xxxxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Tue, 29 Jun 2004 15:04:25 -0500
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@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Leroy Kemnitz
Sent: Tuesday, June 29, 2004 1:51 PM
To: oracle-l@xxxxxxxxxxxxx
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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