From oracle-l-bounce@freelists.org Fri May 13 05:13:20 2005 Return-Path: Received: from air891.startdedicated.com (root@localhost) by orafaq.com (8.12.10/8.12.10) with ESMTP id j4DADKdK014547 for ; Fri, 13 May 2005 05:13:20 -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 j4DADK4Z014543 for ; Fri, 13 May 2005 05:13:20 -0500 Received: from localhost (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id D892619244C; Fri, 13 May 2005 04:10:35 -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 14825-02; Fri, 13 May 2005 04:10:35 -0500 (EST) Received: from turing (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id 5FD5519227E; Fri, 13 May 2005 04:10:35 -0500 (EST) X-MimeOLE: Produced By Microsoft Exchange V6.0.6487.1 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Subject: RE: Who Write Undo Information From The DbCache To The Physically UndoDatafile. Date: Fri, 13 May 2005 11:08:45 +0200 Message-ID: <7F0C000A3ABA6241A10C9ABF37EEB46D0408A1@MSXVS01.trivadis.com> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: Who Write Undo Information From The DbCache To The Physically UndoDatafile. Thread-Index: AcVXlapOeLJozUZLQVK0nIg+AeWZSAABA2nA From: "Christian Antognini" To: "Sheldon Quinny" Cc: X-archive-position: 19657 X-ecartis-version: Ecartis v1.0.0 Sender: oracle-l-bounce@freelists.org Errors-To: oracle-l-bounce@freelists.org X-original-sender: Christian.Antognini@trivadis.com Precedence: normal Reply-To: Christian.Antognini@trivadis.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=AWL autolearn=ham version=2.63 Hi Sheldom >When you issue a DML statement to change data, the server >process first saves the old values in a rollback segment. > >Sever Process....This Happening From The Buffer To The=20 >Datafile Or Rollback Segments. > >How Can U Justifiy This.. It really depends on how you read it...=20 The problem is defining the term "saves". According to your = interpretation saving something in the rollback segment is writing it to = disk. For somebody else could be modifying the block and generating the = necessary redo information. Anyway, since it's not saying the server = process writes in the datafiles, I see no problem. HTH Chris -- http://www.freelists.org/webpage/oracle-l