From oracle-l-bounce@freelists.org Tue May 24 18:02:59 2005 Return-Path: Received: from air891.startdedicated.com (root@localhost) by orafaq.com (8.12.10/8.12.10) with ESMTP id j4ON2xvX028373 for ; Tue, 24 May 2005 18:02:59 -0500 X-ClientAddr: 206.53.239.180 Received: from turing.freelists.org (freelists-180.iquest.net [206.53.239.180]) by air891.startdedicated.com (8.12.10/8.12.10) with ESMTP id j4ON2xNi028369 for ; Tue, 24 May 2005 18:02:59 -0500 Received: from localhost (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id 770301B1C3D; Tue, 24 May 2005 17:00:02 -0500 (EST) Received: from turing.freelists.org ([127.0.0.1]) by localhost (turing [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 01897-03; Tue, 24 May 2005 17:00:02 -0500 (EST) Received: from turing (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id EEED91B1E4E; Tue, 24 May 2005 17:00:01 -0500 (EST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:from:to:subject:date:mime-version:content-type:content-transfer-encoding:x-mailer:in-reply-to:x-mimeole:thread-index:message-id; b=rOe/c1MGQbxj0qvGTNCnqs+OUrVLer3x2ED3/Qv282X1dAw0ngkzwbmjdpydDLqND/R019KXoJpQKUylQHYm8d5gGrdsijHAtb39r2LqUEODvQvbi3TKmTYm6ELBrte3P4wVw+VcfDoEQ4rNdbnVST2N6J+JiBe2k2eXyv7y8YE= From: "Ken Naim" To: , Subject: RE: 9.2.0.6 Optimizer issue Date: Tue, 24 May 2005 16:58:07 -0500 MIME-Version: 1.0 Content-type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit In-Reply-To: <427B92A5.2080104@centrexcc.com> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Thread-Index: AcVSU5enhP9XMA+lTsCgPR+G1bhMhgOV8daA Message-ID: <4293a36f.6099545f.4293.26c9@mx.gmail.com> X-archive-position: 20222 X-ecartis-version: Ecartis v1.0.0 Sender: oracle-l-bounce@freelists.org Errors-To: oracle-l-bounce@freelists.org X-original-sender: kennaim@gmail.com Precedence: normal Reply-To: kennaim@gmail.com X-list: oracle-l X-Virus-Scanned: by amavisd-new-20030616-p9 (Debian) at avenirtech.net X-Spam-Level: X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on air891.startdedicated.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=ham version=2.63 I am developing a new application and wanted to know if someone could refer me to document or web page that shows the proper method(s) of backing up statistics. Thanks, Ken -----Original Message----- From: oracle-l-bounce@freelists.org [mailto:oracle-l-bounce@freelists.org] On Behalf Of Wolfgang Breitling Sent: Friday, May 06, 2005 10:52 AM To: Ignizio, Richard Cc: oracle-l@freelists.org Subject: Re: 9.2.0.6 Optimizer issue responses inline Ignizio, Richard wrote: > As of right now I do not back up old statistics, but I might make it a practice now. DO, not might > The database was shutdown before the application upgrade for backups, would that erase the contents of the sys.col_usage$ table? Not normally > Would histograms affect whether Oracle chose to do a NL or a HJ? Histograms can affect not only the choice of join method but other plan particulars as well. So can any number of statistics. -- Regards Wolfgang Breitling Centrex Consulting Corporation www.centrexcc.com -- http://www.freelists.org/webpage/oracle-l -- http://www.freelists.org/webpage/oracle-l