From oracle-l-bounce@freelists.org Wed Jun 29 16:21:32 2005 Return-Path: Received: from air891.startdedicated.com (root@localhost) by orafaq.com (8.12.10/8.12.10) with ESMTP id j5TLLWHh029103 for ; Wed, 29 Jun 2005 16:21:32 -0500 X-ClientAddr: 206.53.239.180 Received: from turing.freelists.org (freelists-180.iquest.net [206.53.239.180] (may be forged)) by air891.startdedicated.com (8.12.10/8.12.10) with ESMTP id j5TLLSIP029090 for ; Wed, 29 Jun 2005 16:21:28 -0500 Received: from localhost (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id EC6291C4ABD; Wed, 29 Jun 2005 15:17:55 -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 13770-05; Wed, 29 Jun 2005 15:17:55 -0500 (EST) Received: from turing (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id 685991C5382; Wed, 29 Jun 2005 15:17:55 -0500 (EST) X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C57CE7.625EC44B" Subject: System Statistics...do I need them? - (DBMS_STATS.GATHER_SYSTEM_STATS) Date: Wed, 29 Jun 2005 16:16:07 -0400 Message-ID: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: System Statistics...do I need them? - (DBMS_STATS.GATHER_SYSTEM_STATS) Thread-Index: AcV852JeAdgGQeKBTHePDdmyYKbXIQ== From: "Marquez, Chris" To: X-archive-position: 21852 X-ecartis-version: Ecartis v1.0.0 Sender: oracle-l-bounce@freelists.org Errors-To: oracle-l-bounce@freelists.org X-original-sender: cmarquez@collegeboard.org Precedence: normal Reply-To: cmarquez@collegeboard.org X-list: oracle-l X-Virus-Scanned: by amavisd-new-20030616-p9 (Debian) at avenirtech.net X-mailscan-MailScanner-Information: Please contact the ISP for more information X-mailscan-MailScanner: Found to be clean X-MailScanner-From: oracle-l-bounce@freelists.org X-Spam-Level: X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on air891.startdedicated.com X-Spam-Status: No, hits=-3.0 required=5.0 tests=AWL,BAYES_00,HTML_MESSAGE autolearn=ham version=2.63 ------_=_NextPart_001_01C57CE7.625EC44B Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Any one have advise, references/links/docs, and procedures for using, = colleting, and maintaining System Statistics = (DBMS_STATS.GATHER_SYSTEM_STATS). I have never used them but am looking to se if I can *help* further = improve the performance of database application code. I will not re-write (the application) bad sql but as a DBA I do feel = obligated to maintain and improve the database or create the best = playing filed possible (for the bad sql ;o) ). By not having System Statistics am I not giving the database code a = better chance? Thanks PS I believe (know) nothing is free in life nor with Oracle...there are no = "silver bullets". Having any stats is an attempt and will change sql plans...for better = *OR* for worse. I assume this rule applies to having System Statistics, no? Simply...what is the chance things run worse with System Statistics? PPS I found these; Doc ID: Note:149560.1 Subject: Collect and Display System Statistics (CPU and IO) for CBO = usage Doc ID: Note:153761.1 Subject: Scaling the System to Improve CBO optimizer Chris Marquez Oracle DBA ------_=_NextPart_001_01C57CE7.625EC44B Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable System Statistics...do I need them? - = (DBMS_STATS.GATHER_SYSTEM_STATS)

Any one have advise, references/links/docs, and = procedures for using, colleting, and maintaining System Statistics = (DBMS_STATS.GATHER_SYSTEM_STATS).

I have never used them but am looking to se if I can *help* further = improve the performance of database application code.
I will not re-write (the application) bad sql but as a DBA I do feel = obligated to maintain and improve the database or create the best = playing filed possible (for the bad sql ;o) ).

By not having System Statistics am I not giving the database code a = better chance?

Thanks

PS
I believe (know) nothing is free in life nor with Oracle...there are no = "silver bullets".
Having any stats is an attempt and will change sql plans...for better = *OR* for worse.
I assume this rule applies to having System Statistics, no?
Simply...what is the chance things run worse with System Statistics?


PPS I found these;
Doc ID:         Note:149560.1
Subject:        Collect and Display System = Statistics (CPU and IO) for CBO usage

Doc ID:         Note:153761.1
Subject:        Scaling the System to = Improve CBO optimizer


Chris Marquez
Oracle DBA

------_=_NextPart_001_01C57CE7.625EC44B-- -- http://www.freelists.org/webpage/oracle-l