optimizer parameters in Oracle 9.2

From: Gurelei <gurelei_at_yahoo.com>
Date: Wed, 30 Jul 2003 06:04:28 -0800
Message-ID: <F001.005C7D40.20030730060428@fatcity.com>

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

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Author: Gurelei
  INET: gurelei_at_yahoo.com

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