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RE: Index key compression - performance benefits?

From: Christian Antognini <Christian.Antognini_at_trivadis.com>
Date: Thu, 31 Aug 2006 22:53:38 +0200
Message-ID: <F2C9CCA71510B442AF71446CAE8AEBAF01A978@MSXVS04.trivadis.com>


Keith

> I ran the command in a test system and all the stats were generated
> except compression. Any idea why? It is Oracle 9.2.0.4, 64 bit on
> Solaris.

<snip>
> I then dropped and recreated the index with 'compress 1' and got
> about 50% compression.

I see only two possibilities...

  1. They calculation is buggy.
  2. In your index there was a lot of free space. To confirm/deny this point you could simply try to create a fresh index with and without compression...

HTH
Chris

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Received on Thu Aug 31 2006 - 15:53:38 CDT

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