RE: Healty ratio of index segment size vs table segment size?

They appear to be Tango Uniform today!!

Dick Goulet
Senior Oracle DBA
Oracle Certified 8i DBA

-----Original Message-----
Sent: Wednesday, January 21, 2004 12:25 PM To: Multiple recipients of list ORACLE-L

www.ixora.com.au

there is a script in there that will identify unnecessary redundant indexes.

for the record, that is one of the best oracle websites out there. Lots of great stuff on it.
>
> From: Branimir Petrovic <BranimirP_at_cpas.com>
> Date: 2004/01/21 Wed AM 10:39:25 EST
> To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
> Subject: Healty ratio of index segment size vs table segment size?
>
> Wondering if there is a "rule of thumb", quick'n fast but good enough
> to be used as an indicator, litmus paper so to speak, of overly indexed
> table(s)...
>
> Can, better yet - should, sheer size comparison of index versus table
> segments be used as a reliable pointer to problematic table indexing?
>
> If it can, what could be considered as average "healthy ratio" above
> which would be prudent to have a closer look and investigate?
>
> Related to the above dilemma, how "expensive" is to monitor index usage,
> say if script is run against all few hundred indexes on app tables,
> would the additional load noticeably affect application performance or
> is it better/safer or may be required to monitor not more than just a
> few "most suspected" indexes at a time?
>
> Thoughts, pointers, opinions - appreciated.
>
> Branimir
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Branimir Petrovic
> INET: BranimirP_at_cpas.com
>
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