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Re: quick suggestions for tuning ?

From: Wolfgang Breitling <breitliw_at_centrexcc.com>
Date: Mon, 11 Aug 2003 07:24:24 -0800
Message-ID: <F001.005CA189.20030811072424@fatcity.com>


At 06:59 AM 8/11/2003 -0800, you wrote:
>Thanks a lot Connor.
>Apart from bind vars.,LIO is a big issue here.
>
>54 million consistent gets.
>does it mean that db_cache_size (700M) is small ?

No, the buffer pool size has absolutely nothing to do with the number of logical IOs. Its size only determines how many of the LIOs end up as PIOs - the infamous buffer hit ratio. The only way to reduce the # of LIOs is through SQL tuning.

>any good docs or links regarding LIO and how to deal with it ?
>
>Can u explain me Connor ?

Wolfgang Breitling
Oracle7, 8, 8i, 9i OCP DBA
Centrex Consulting Corporation
http://www.centrexcc.com

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Received on Mon Aug 11 2003 - 10:24:24 CDT

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