RE: index rebuild

From: Powell, Mark D <mark.powell_at_eds.com>
Date: Thu, 18 Mar 2004 12:04:42 -0500
Message-ID: <564DE4477544D411AD2C00508BDF0B6A1CE0AA56@USAHM018.amer.corp.eds.com>

David, what was "determined" based on my reading of the posts is that height is not a reliable indicator for use in determining when an index needs rebuilding since size alone can require that the index be in a certain number of levels.

Mark D Powell --

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of thump604_at_comcast.net Sent: Thursday, March 18, 2004 11:43 AM
To: oracle-l_at_freelists.org
Subject: index rebuild

There was some recent discusison on here regarding rebuilding indices based solely on height.

Is this a good criteria to use in determining what indices to rebuild: height is greater than 4
percentage wasted space on deleted entries compared to active entries is greater than 20%
percentage of deleted entries compare to active entries is greater than 20%

Should any other critera be followed and could indices be flagged under this criteria and still don't necessarily need to be rebuilt.

Thought and opinions please...

Thanks
--

- David

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Received on Thu Mar 18 2004 - 11:58:49 CST