RE: Tuning 9i Database - after migrating from 8i. -

From: Wolfgang Breitling <breitliw_at_centrexcc.com>
Date: Thu, 04 Mar 2004 14:57:58 -0700
Message-Id: <6.0.3.0.2.20040304145740.02c25178@pop.centrexcc.com>

Yes

At 01:52 PM 3/4/2004, you wrote:
>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.

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

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Received on Thu Mar 04 2004 - 17:09:47 CST