Re: SHOULD WE ANALYZE 9.2 SYS tables?
- From: Wolfgang Breitling <breitliw@xxxxxxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Thu, 29 Jul 2004 13:17:28 -0600
That's how myths start. That was true for Oracle 8 and earlier. As of
Oracle 9 you should be OK analyzing catalog tables. Oracle has by now
strewn lots of /*+ rule */ hints in the recursive sql to eliminate/minimize
the performance hits experienced before. I doubt that there is a need for
it though (analyzing sys tables that is). Maybe if you have some homegrown
scripts that join catalog tables/views in ways not foreseen by the
developers or with other tables, statistics on the sys tables may help.
At 12:41 PM 7/29/2004, you wrote:
>Hi Larry
>SYS schema don't need be analyzed, using tom kyte's word "it's magical" and
>must not be analyzed
>if you got statistics in sys, you can ruin it's performance.
>sys schema don't have to be touched, this means don't create user tables in
>sys, etc.
>
>
>
>Juan Carlos Reyes Pacheco
>OCP
Regards
Wolfgang Breitling
Centrex Consulting Corporation
www.centrexcc.com
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