Bitmap Indexes sizes

From: Browett, Darren <dbrowett_at_city.coquitlam.bc.ca>
Date: Wed, 18 Apr 2001 14:10:43 -0700
Message-ID: <F001.002EC402.20010418141527@fatcity.com>

I have (had) an index that according to index_stat (after analyze index) and dba_extents that
reported to be approximately 53 Mb and took up 11 extents. The percentage increase is 50.

I dropped the index and recreated it, after I adjusted the initial extents, it turns out the final size
is less then 500k. This seems like a large amount for it to drop.

The index is on a snapshot within our data warehouse.

Has anybody else seen this ?? Is this a problem with bitmap indexes. ??

Thanks

Darren

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Darren Browett P.Eng                                    This message was
transmitted
Systems Admin/DBA                                       using 100% recycled

electrons
Information and Communications Technology. City of Coquitlam P:(604) 927 - 3614
E:dbrowett_at_city.coquitlam.bc.ca

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Author: Browett, Darren
  INET: dbrowett_at_city.coquitlam.bc.ca

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