Re: When should one rebuild an index?

From: DA Morgan <>
Date: Fri, 26 Dec 2008 21:51:09 -0800
Message-ID: <> wrote:
> Hi
> We can use
> command on the affected indexes - each invocation of this command
> creates a single row in the INDEX_STATS view.
> Thus determining the indexes which are good candidates for rebuilding.
> BUT my doubt is that if,
> we use dbms_stats to gather the statstistics for CBO using cascade
> option. Then if
> ANALYZE INDEX <index> VALIDATE STRUCTURE is ran , that what will be
> fate of the stattistics gathered using dbms_stat for index( cascade
> option).
> Also, analyze command is deprecated now. So is there any other way to
> find out the indexes which needs rebuilding.?
> Thanks.

I can think of a few worse criteria but you are reasonably close. As does Charles Hooper I highly recommend you read Richard Foote's notes.

Daniel A. Morgan
Oracle Ace Director & Instructor
University of Washington (replace x with u to respond)
Puget Sound Oracle Users Group
Received on Fri Dec 26 2008 - 23:51:09 CST

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