Message-ID: <F001.005C7D69.20030730072431@fatcity.com>
Date: Wed, 30 Jul 2003 07:24:31 -0800
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From: Gurelei <gurelei@yahoo.com>
Subject: RE: optimizer parameters in Oracle 9.2
Organization: Fat City Network Services, San Diego, California
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Rich,

thanks a lot. I just finished reading Tim's paper and
it is truly enjoyable reading. I'm going to test his
advices in a few moments.

Gene
--- "Jesse, Rich" <Rich.Jesse@qtiworld.com> wrote:
> Paging Mr. Gorman....Mr. Tim Gorman...
> 
> I had wonderful luck with Tim's paper "The Search
> for Intelligent Life in
> the Cost-Based Optimizer" from:
> http://www.evdbt.com/papers.htm
> 
> Enjoy!  (And thanks again, Tim!)
> 
> Rich
> 
> Rich Jesse                           System/Database
> Administrator
> rjesse@qtiworld.com                  Quad/Tech Inc,
> Sussex, WI USA
> 
> 
> > -----Original Message-----
> > From: Gurelei [mailto:gurelei@yahoo.com]
> > Sent: Wednesday, July 30, 2003 9:04 AM
> > To: Multiple recipients of list ORACLE-L
> > Subject: optimizer parameters in Oracle 9.2
> > 
> > 
> > Hi all:
> > 
> > I have been reading on the optimizer_ parameters
> for 
> > Oracle 9i - optimizer_max_permutation,
> > optimizer_index_caching and
> optimizer_index_cost_adj. 
> > I have also been playing whith them and I can see
> that
> > they affect the explain plans for some queries
> quite
> > dramatically. Is there any guidelines for what
> they
> > should be set to for optimum performance (some
> kind of
> > range and may be relationship between the values)
> or
> > is this mostly a trial and error kind of thing? I
> have
> > seen a few discussion on the Oracle Metalink, but
> > mostly they are very specific  - try this value or
> try
> > that value. Does anyone have a link to a document
> with
> > something more systematic than that? 
> > 
> > 
> > thank you 
> > 
> > Gene
> -- 
> Please see the official ORACLE-L FAQ:
> http://www.orafaq.net
> -- 
> Author: Jesse, Rich
>   INET: Rich.Jesse@qtiworld.com
> 
> Fat City Network Services    -- 858-538-5051
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Author: Gurelei
  INET: gurelei@yahoo.com

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