RE: Tuning 9i Database - after migrating from 8i. -
- From: "Jacques Kilchoer" <Jacques.Kilchoer@xxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 4 Mar 2004 12:52:30 -0800
Do you mean that in the databases you work with OPTIMIZER_INDEX_COST_ADJ is
usually set to the default of 100?
> -----Original Message-----
> Wolfgang Breitling
>
> I have to admit that I am not a fan of changing them from
> their default
> values. In the databases I am, or have been, working with
> (Peoplesoft),
> changing them usually induces too many NL joins with
> disastrous consequences.
>
> In Oracle 9i I would investigate the use of
> dbms_stats.gather_system_stats
> prior to attempting to tweak the O_I_C.. parameters. Joze Senegacnik
> reports good success with it. I myself do not have experience
> with 9i in a
> large enough production setting to say.
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