Re: OPTIMIZER_INDEX_COST_ADJ & OPTIMIZER_INDEX_CACHING

Thank you very much for your valuable suggestions..

Nirav

Matthias Hoys wrote:
> "nirav" <shivam71_at_gmail.com> wrote in message
> news:1149862057.387997.169770_at_c74g2000cwc.googlegroups.com...
> > Hi,
> >
> > I have both of these parameters . set at their default values in my db.
> > (100 & 0 respectively.) That however might not be the correct setting ,
> > so could you please guide on how to decide the correct setting for
> > these parameters for the database(version 9.2.0.6)?
> >
>
> Do you have any performance problems right now or any other problems that
> make you think you should change the values of these parameters ? If not, I
> would suggest leaving them to their default values. If you do have problems
> with specific queries (for example queries that take ages because of a full
> table scan, while forcing the use of an index is much faster), then you
> could first try to change anything session-wide with "alter session set ...
> = ..., and see if this helps. A server-wide change (init.ora or spfile) may
> have a large impact since some queries could go faster while others could go
> slower. So you really should try to test and benchmark this well.
>
> HTH
> Matthias
Received on Mon Jun 12 2006 - 05:29:54 CDT