Oracle-L: RE: Analyze running twice as long after upgrade to 8.1.7.2

From: <Cherie_Machler_at_gelco.com>
Date: Tue, 11 Jun 2002 05:08:22 -0800
Message-ID: <F001.0047A1E7.20020611050822@fatcity.com>

Jack,

Thanks for this insight. I'll check this out.

We did not change our sort_area_size. However, I suspect there have been changes in the default method that Oracle is using sort_area_size. Perhaps I need to increase sort_area_size? I have a test database I can try it out on and see.

Thanks,

Cherie

                                                                                                                 
                    Jack Silvey                                                                                  
                    <jack_silvey_at_y       To:     Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>     
                    ahoo.com>            cc:                                                                     
                    Sent by:             Subject:     RE: Analyze running twice as long after upgrade to 8.1.7.2 
                    root_at_fatcity.c                                                                               
                    om                                                                                           
                                                                                                                 
                                                                                                                 
                    06/10/02 10:13                                                                               
                    PM                                                                                           
                    Please respond                                                                               
                    to ORACLE-L

Just a thought, since analyze does sorting, might be a change in sort_area_size. Did you change this param when you upgraded? Try it with a large sort_area and see what happens.

jack silvey

Paula_Stankus_at_doh.state.fl.us wrote:
> I suggest running in parallel. Also, is the table
> partitioned?
>
> -----Original Message-----
> Sent: Monday, June 10, 2002 4:39 PM
> To: Multiple recipients of list ORACLE-L
>
>
>
> We just upgraded our data warehouse from version
> 8.0.4 to version 8.1.7.2
> of Oracle. We run on Sun Solaris 2.6 vith Veritas
> Quick I/O.
>
> We do an analyze compute nightly with a 10% estimate
> of our large, main
> fact table. Before the upgrade, the analyze ran
> for 45 minutes. Since
> the upgrade, it's run three times at a consistent 90
> minutes.
>
> I am trying to research on Metalink but have not had
> much success. Why
> would this analyze suddenly run longer? I wouldn't
> think that analyze
> code is being modified much in new releases. All
> the effort would go into
> new packages like DBMS_STATS. Is anyone aware of
> analyze changing in 8i.
>
> Our analyze was of a partitioned table and was
> single-threaded, not
> parallel. I can see that it is still
> single-threaded.
>
> We really didn't change much during the upgrade. I
> added another datafile
> to the SYSTEM tablespace (on the same file system as
> the previous file).
>
> I also changed parallel_threads_per_cpu from 2 to 0.
> However, since we
> never did the analyze in parallel, I don't think it
> was an issue.
>
> Any other ideas? I'd like to be able to give our
> application owners some
> explanation.
>
> Thanks,
>
> Cherie
>
> --
> Please see the official ORACLE-L FAQ:
> http://www.orafaq.com
> --
> Author:
> INET: Cherie_Machler_at_gelco.com
>
> Fat City Network Services -- (858) 538-5051 FAX:
> (858) 538-5051
> San Diego, California -- Public Internet
> access / Mailing Lists
>

> To REMOVE yourself from this mailing list, send an
> E-Mail message
> to: ListGuru_at_fatcity.com (note EXACT spelling of
> 'ListGuru') and in
> the message BODY, include a line containing: UNSUB
> ORACLE-L
> (or the name of mailing list you want to be removed
> from). You may
> also send the HELP command for other information
> (like subscribing).
>

Do You Yahoo!?
Yahoo! - Official partner of 2002 FIFA World Cup http://fifaworldcup.yahoo.com

--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Jack Silvey
  INET: jack_silvey_at_yahoo.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).




-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: 
  INET: Cherie_Machler_at_gelco.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).

Received on Tue Jun 11 2002 - 08:08:22 CDT