RE: about analyse table..

From: Toepke, Kevin M <ktoepke_at_cms.cendant.com>
Date: Fri, 23 Mar 2001 10:03:23 -0800
Message-ID: <F001.002D61A2.20010323075606@fatcity.com>

Just a FYI about Analyzing...

As of Oracle 8i, Oracle recommends using the DBMS_STATS package instead of the ANALYZE command or DBMS_UTILITY procedures. The DBMS_STATS package gathers more statistics than either ANALYZE or the DBMS_UTILITY packages -- potentially resulting in better query performance. In addition, the DBMS_STATS package can parallelize the gathering of statistics, speeding the procss.

Do not mix and match your analyze tool usages!!! ANALYZE cannot overwrite or delete some of the values of statistics that were gathered by DBMS_STATS. This could cause some EXTREMELY bad query performance -- trust me, I know. Been there, done that.

Kevin Toepke

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Author: Toepke, Kevin M
  INET: ktoepke_at_cms.cendant.com

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Received on Fri Mar 23 2001 - 12:03:23 CST