Re: re Rebuilding Indexes in Oracle Apps -- was RE: RE: Separate

Hi Hemant,

One word perfectly describes the Metalink article you highlighted:

Crap ;)

A nice example of how Oracle Corp is the greatest myth generator of them all !! It's all rather sad and embarressing isn't.

Thanks for the headsup. Anyone in a position to get the note removed ?

Cheers

Richard

>Quoting Metalink Note 182699.1 bde_rebuild.sql Validates and Rebuilds
Fragmentated Indexes (8.0->9.0)
>
>Index fragmentation occurs when a key value changes, and the index row is
>deleted from one place (Leaf Block) and inserted into another.
>
> Deleted Leaf Rows are not reused. Therefore indexes whose columns are
 >subject to value change must be rebuilt periodically since they become naturally fragmentated.
>

 >An index is considered to be 'fragmentated' when more than 20% of its Leaf Rows space is
>empty because of the implicit deletes caused by indexed columns value
changes.
>

 >Fragmentated indexes degrade the performance of index range scan operations.

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Author: Richard Foote
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