Return-Path: Received: from ensim.rackshack.net (root@localhost) by orafaq.net (8.11.6/8.11.6) with ESMTP id h1RK0G305693 for ; Thu, 27 Feb 2003 14:00:16 -0600 X-ClientAddr: 209.68.248.164 Received: from newsfeed.cts.com (newsfeed.cts.com [209.68.248.164]) by ensim.rackshack.net (8.11.6/8.11.6) with ESMTP id h1RK0GG05684 for ; Thu, 27 Feb 2003 14:00:16 -0600 Received: from fatcity.UUCP (uucp@localhost) by newsfeed.cts.com (8.9.3/8.9.3) with UUCP id IAA85088; Thu, 27 Feb 2003 08:42:12 -0800 (PST) Received: by fatcity.com (26-Feb-2001/v1.0g-b72/bab) via UUCP id 0055B736; Thu, 27 Feb 2003 07:04:08 -0800 Message-ID: Date: Thu, 27 Feb 2003 07:04:08 -0800 To: Multiple recipients of list ORACLE-L X-Comment: Oracle RDBMS Community Forum X-Sender: "Terrian, Tom (Contractor) (DAASC)" Sender: root@fatcity.com Reply-To: ORACLE-L@fatcity.com Errors-To: ML-ERRORS@fatcity.com From: "Terrian, Tom (Contractor) (DAASC)" Subject: RE: DBMS_STATS Organization: Fat City Network Services, San Diego, California X-ListServer: v1.0g, build 72; ListGuru (c) 1996-2001 Bruce A. Bergman Precedence: bulk Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Thanks to Tim Johnston and Jonathan Lewis. They were exactly right! Tom -----Original Message----- Sent: Tuesday, February 25, 2003 7:49 PM To: Multiple recipients of list ORACLE-L To expand on this, the action level is controlled by the granularity parameter... Granularity of statistics to collect (only pertinent if the table is partitioned). DEFAULT: Gather global- and partition-level statistics. SUBPARTITION: Gather subpartition-level statistics. PARTITION: Gather partition-level statistics. GLOBAL: Gather global statistics. So, in you case, run the following... execute dbms_stats.gather_table_stats(ownname => 'LDGADMIN', - tabname => 'LOG_TRANS', - partname => 'LOG_TRANS_20030102', estimate_percent => 5, granularity => 'PARTITION'); See the supplied package reference for more details... Tim -----Original Message----- Sent: Tuesday, February 25, 2003 4:50 PM To: Multiple recipients of list ORACLE-L The default action of dbms_stats against a single partition of a partitioned table is much more aggressive than a simple analyze of the partition. At the least, it does a similar analyze of the whole table in order to maintain the global table statistics - you need to set the granularity of the analyze to stop this happening. On a quick test, with sql_trace turned on and using 9.2.0.2, your choice of parameters gave me: Two 5% analyzes of the specified partition, with a small difference relating to one longish varchar() column. One 5% analyze of the whole table. One 50% analyze of the whole table - restricted to a much smaller process of a subset of the columns that omitted the one longish varchar() column. Regards Jonathan Lewis http://www.jlcomp.demon.co.uk Coming soon one-day tutorials: Cost Based Optimisation Trouble-shooting and Tuning Indexing Strategies (see http://www.jlcomp.demon.co.uk/tutorial.html ) ____UK_______March 19th ____USA_(FL)_May 2nd Next Seminar dates: (see http://www.jlcomp.demon.co.uk/seminar.html ) ____USA_(CA, TX)_August The Co-operative Oracle Users' FAQ http://www.jlcomp.demon.co.uk/faq/ind_faq.html ----- Original Message ----- To: "Multiple recipients of list ORACLE-L" Sent: 25 February 2003 18:12 > I have never had good luck with DBMS_STATS. It seems that the old analyze runs > much faster..... > > Runs in 45 seconds: > analyze table log_trans partition (log_trans_20030104) estimate statistics > sample 5 percent; > > Takes over 2 hours: > execute dbms_stats.gather_table_stats(ownname => 'LDGADMIN', - > tabname => 'LOG_TRANS', - > partname => 'LOG_TRANS_20030102', - > estimate_percent => 5); > > Am I missing something? Aren't both commands the same? > > Thanks, > Tom > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Jonathan Lewis INET: jonathan@jlcomp.demon.co.uk Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru@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.net -- Author: Johnston, Tim INET: TJohnston@quallaby.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru@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.net -- Author: Terrian, Tom (Contractor) (DAASC) INET: Tom.Terrian@dla.mil Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru@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).