How much OPTIMIZER_INDEX_CACHING and OPTIMIZER_INDEX_COST_ADJ should I set?

Dear all:
I use CBO and the default parameter of the "OPTIMIZER_INDEX_CACHING" is 0 and "OPTIMIZER_INDEX_COST_ADJ" is 100 these two parameters will impact of CBO. how much OPTIMIZER_INDEX_CACHING should I set?
my environment is Oracle 9.2.0.8 (64bit)
Regards
Terry

Terry Chen wrote:
Dear Nicolas:
Thank you for your quick reply, I have to say I have to modify the default setting of these parameters ,because we use EBS 11.5.9 and the database is more powerful then ever before and the SQL explain plan still show to do sorting with high cost.So I think I will refer to the articles of the provided and find the answers.
Before you start playing around with these parameters, have you checked very carefully that you are conforming to the suggestions offered for all the parameters listed in the installation notes for EBS, and doing what you're supposed to do with system statistics ?
Regards
Jonathan Lewis

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How much OPTIMIZER_INDEX_CACHING and OPTIMIZER_INDEX_COST_ADJ should I set?

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