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. -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Richard Foote INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
