Re: SHOULD WE ANALYZE 9.2 SYS tables?

From: Wolfgang Breitling <breitliw_at_centrexcc.com>
Date: Thu, 29 Jul 2004 13:17:28 -0600
Message-Id: <6.1.0.6.2.20040729131025.02e59d70@pop.centrexcc.com>

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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Received on Thu Jul 29 2004 - 14:14:18 CDT