RE: dbms_stats.gather_schema

From: Koivu, Lisa <Lisa.Koivu_at_Fairfieldresorts.com>
Date: Thu, 12 Jun 2003 12:47:49 -0700
Message-ID: <F001.005B0A2F.20030612123739@fatcity.com>

Hi Mitchell,

The most efficient way to keep updated stats is to use monitoring and use 'GATHER STALE' option. Bear in mind that just because there is an entry in ALL_TAB_MODIFICATIONS does not mean that the next analyze using 'GATHER STALE' will analyze that table. It is based upon whether the changes add up to more than 10% change.

The way I do it now (after my very public fiasco with dbms_stats over the last couple of weeks) is I wrote a perl script that reads all_tab_modifications and fires the appropriate analyze command. If you'd like to see it, let me know. It's a quick hack job but it works.

Lisa Koivu
Oracle Database Stressmonkey
Fairfield Resorts, Inc.
5259 Coconut Creek Parkway
Ft. Lauderdale, FL, USA 33063
Office: 954-935-4117
Fax: 954-935-3639
Cell: 954-683-4459

-----Original Message-----
Sent: Thursday, June 12, 2003 4:10 PM
To: Multiple recipients of list ORACLE-L

Hi All

May I know what is best interval to exec dbms_stats.gather_schema_stats on a instance with 300 tables that updated everyday.

By the way, Anybody has any detailed command reference for dbms_stats. I am not sure for the following such as degree?

execute dbms_stats.gather_schema_stats
(
ownname ='FNSS',
degree => 4,
cascade => true
);

Thanks in advance
Mitchell

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Author: Mitchell
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Author: Koivu, Lisa
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RE: dbms_stats.gather_schema_stats