From oracle-l-bounce@freelists.org Wed Jul 7 10:00:11 2004 Return-Path: Received: from air189.startdedicated.com (root@localhost) by orafaq.com (8.11.6/8.11.6) with ESMTP id i67Exux08764 for ; Wed, 7 Jul 2004 10:00:06 -0500 X-ClientAddr: 206.53.239.180 Received: from turing.freelists.org (freelists-180.iquest.net [206.53.239.180]) by air189.startdedicated.com (8.11.6/8.11.6) with ESMTP id i67Exj608712 for ; Wed, 7 Jul 2004 09:59:55 -0500 Received: from localhost (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id 0AAEC72C24F; Wed, 7 Jul 2004 09:41:10 -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 08715-48; Wed, 7 Jul 2004 09:41:09 -0500 (EST) Received: from turing (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id 0655872CD81; Wed, 7 Jul 2004 09:41:09 -0500 (EST) Received: with ECARTIS (v1.0.0; list oracle-l); Wed, 07 Jul 2004 09:39:41 -0500 (EST) X-Original-To: oracle-l@freelists.org Delivered-To: oracle-l@freelists.org Received: from localhost (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id 6CBDE72C71D for ; Wed, 7 Jul 2004 09:39:41 -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 08715-05 for ; Wed, 7 Jul 2004 09:39:41 -0500 (EST) Received: from MXR-3.estpak.ee (ld3.estpak.ee [194.126.101.102]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id 1222972C6B9 for ; Wed, 7 Jul 2004 09:39:41 -0500 (EST) Received: from porgand (213-35-249-191-dsl.kvm.estpak.ee [213.35.249.191]) by MXR-3.estpak.ee (Postfix) with SMTP id 101A647B04 for ; Wed, 7 Jul 2004 18:03:27 +0300 (EEST) Message-ID: <01df01c46433$8e170700$7ea423d5@porgand> From: =?ISO-8859-1?Q?Tanel_P=F5der?= To: References: <20040707140105.79668.qmail@web50008.mail.yahoo.com> Subject: Re: Log switches Date: Wed, 7 Jul 2004 18:03:23 +0300 MIME-Version: 1.0 Content-type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Virus-Scanned: by amavisd-new-20030616-p7 (Debian) at neti.ee X-Virus-Scanned: by amavisd-new at freelists.org X-archive-position: 4556 X-ecartis-version: Ecartis v1.0.0 Sender: oracle-l-bounce@freelists.org Errors-To: oracle-l-bounce@freelists.org X-original-sender: tanel.poder.003@mail.ee Precedence: normal Reply-To: oracle-l@freelists.org X-list: oracle-l X-Virus-Scanned: by amavisd-new at freelists.org Hi! Remember that every logswitch causes a checkpoint, so if you're switching logs very often, you'll have very agressive checkpointing, causing excessive IO and dbwr activity (also all datafiles' headers are updated during full checkpoint). So I doubt that your system will perform well if you're switching logs every few seconds, but if you want to control this manually, you could set archive_lag_target to few seconds, causing a log switch after every given interval... Tanel. ----- Original Message ----- From: "Raj Jamadagni" To: Sent: Wednesday, July 07, 2004 5:01 PM Subject: Log switches > We are testing a streams based replication ... currently log switches happen every minute, we > would like to bring this down to few seconds (to have more instantaneous data available). Is it > possible? This is 9204 environment. > > TIA > Raj > > > > __________________________________ > Do you Yahoo!? > New and Improved Yahoo! Mail - Send 10MB messages! > http://promotions.yahoo.com/new_mail > ---------------------------------------------------------------- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > ---------------------------------------------------------------- > To unsubscribe send email to: oracle-l-request@freelists.org > put 'unsubscribe' in the subject line. > -- > Archives are at http://www.freelists.org/archives/oracle-l/ > FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html > ----------------------------------------------------------------- > ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@freelists.org put 'unsubscribe' in the subject line. -- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------