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High Logical Reads [message #358771]

Wed, 12 November 2008 07:50

kummi_gh
Messages: 2
Registered: March 2005
Location: Trichy

Junior Member

Hi All,

We have geodatabase in our production and some of the queries taking more time and CPU usage also high. I have traced and generated TKPROF. I have attached two sample queries in a text file. Please help, how to reduce high consistent gets.

Thanks in advance
Kumar

Attachment: Consistent_gets.txt
(Size: 8.67KB, Downloaded 1652 times)

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Re: High Logical Reads [message #358895 is a reply to message #358771]

Wed, 12 November 2008 20:30

rleishman
Messages: 3728
Registered: October 2005
Location: Melbourne, Australia

Senior Member

You are reading 10M+ rows via an index. This is typically a bad idea - Full Scans are orders of magnitude faster than index scans for large volumes.

Look at this article for more: http://www.orafaq.com/node/1981

Ross Leishman

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Re: High Logical Reads [message #358905 is a reply to message #358895]

Wed, 12 November 2008 22:58

kummi_gh
Messages: 2
Registered: March 2005
Location: Trichy

Junior Member

Hi Leishman,

Thanks for your feedback and nice article. Those quries are in application level, we will try to tune them.

Kumar

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