RE: Gathering statistics on EM tables
Date: Thu, 14 May 2009 08:23:57 +0100
Check value of statistics_level. It needs to be TYPICAL or ALL to allow the auto gathering of statistics
NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ optimizer_use_pending_statistics boolean FALSE statistics_level string TYPICAL timed_os_statistics integer 0 timed_statistics boolean TRUE ________________________________
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Upendra N Sent: 14 May 2009 02:58
To: niall.litchfield_at_gmail.com; oracle-l_at_freelists.org Subject: RE: Gathering statistics on EM tables
Thanks for your suggestion.
I did check, I don't see stats gathered.
1 select trunc(last_analyzed) date_analyzed, count(*) from dba_tables where owner='SYSMAN'
2* group by trunc(last_analyzed)
SQL> / DATE_ANALYZED COUNT(*)
------------------- ---------- 15 08/05/2009 00:00:00 1 07/05/2009 00:00:00 2 09/05/2009 00:00:00 1 23/03/2007 00:00:00 762
I will also get the information on cardinality soon.
> Date: Wed, 13 May 2009 09:34:42 +0100
> Subject: Re: Gathering statistics on EM tables
> From: niall.litchfield_at_gmail.com
> To: nupendra_at_hotmail.com; oracle-l_at_freelists.org
> Well as the repository is a 10g database, you'll be gathering stats
> every night by default anyway. Do the execution plans show bad
> cardinality estimates?
> On 5/13/09, Upendra N <nupendra_at_hotmail.com> wrote:
> > We have Oracle Grid control 10.2.0.2 on solaris 10. Some of the custom
> > written reports are eating up quite a bit of CPU cycles (tables are not
> > large). The issue seems to be incorrect query plan. Do we need to anything
> > special on gathering schema/object statistics?
> > I am thinking of gathering statistics once a week for the entire schema.
> > Any suggestions?
> > Thanks
> > -Upendra
> > _________________________________________________________________
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> Niall Litchfield
> Oracle DBA
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Received on Thu May 14 2009 - 02:23:57 CDT