Oracle-L: RE: DBMS_STATS.GATHER_DATABASE_STATS analyzes SYS and SYSTEM inde

From: Post, Ethan <Ethan.Post_at_ps.net>
Date: Fri, 04 Oct 2002 14:08:36 -0800
Message-ID: <F001.004E1694.20021004140836@fatcity.com>

Arrgggg...

So anyway, I am thinking, hey it's high time I start using DBMS_STATS instead of my own procedure so I kick of the following (Oracle 8.1.7.4). After the first run I have SYS and SYSTEM stats on indexes and on other schemas with NO STATS it just ignored those tables even though you can see I have GATHER EMPTY below. So I kick it off again and guess what, it starts analyzing the tables it missed the first time, including SYS and SYSTEM. Guess I am going to use DBMS_STATS.GATHER_TABLE_STATS and be a bit more specific about what I get.

define estimate_percent=5

declare

begin

Can easily change to gather_schema_stats (make sure you add schema name) dbms_stats.gather_database_stats( &estimate_percent,FALSE,'FOR ALL COLUMNS SIZE 1', NULL,'DEFAULT',TRUE,NULL,NULL,'GATHER EMPTY');

dbms_stats.gather_database_stats(

      &estimate_percent,FALSE,'FOR ALL COLUMNS SIZE 1',
      NULL,'DEFAULT',TRUE,NULL,NULL,'GATHER STALE');

exception

when others then

dbms_output.put_line(dbms_utility.format_error_stack); end;

Ethan Post
perotdba (AIM), epost1 (Yahoo)

-----Original Message-----
Sent: Friday, October 04, 2002 3:56 PM
To: ORACLE-L_at_fatcity.com
Cc: Ethan.Post_at_ps.net
indexes?
Importance: High

I seem to recall this is a bug. You may want to check MetaLink.

In any case, you don't want to analyze SYS on any version of Oracle. ( yet )

Don't see what harm in having stats on SYSTEM tables though.

It's just a DBA account.

Jared

"Post, Ethan" <Ethan.Post_at_ps.net>
Sent by: root_at_fatcity.com
10/04/2002 02:23 PM
Please respond to ORACLE-L

        To:     Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
        cc: 
        Subject:        DBMS_STATS.GATHER_DATABASE_STATS analyzes SYS and

SYSTEM indexes?

Looks like this is the case, does it know something I don't know? Are indexes OK to analyze in the SYS and SYSTEM schemas? Looks like is correctly does not do tables.

Ethan

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Author: Post, Ethan
INET: Ethan.Post_at_ps.net

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