X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (unknown [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id A5B5B529C0 for ; Fri, 29 Jul 2005 10:23:14 -0300 (ADT) Received: from svr1.postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 38219-08 for ; Fri, 29 Jul 2005 13:23:05 +0000 (GMT) Received: from mr2.surnet.cl (smtp2.surnet.cl [216.155.73.163]) by svr1.postgresql.org (Postfix) with ESMTP id 15D3952939 for ; Fri, 29 Jul 2005 10:23:04 -0300 (ADT) Received: from smtp2.surnet.cl (216.155.73.169) by mr2.surnet.cl (7.0.031.3) id 4259ADFA0191741E; Fri, 29 Jul 2005 09:21:47 -0400 Received: from smtp1.surnet.cl (smtp1.surnet.cl []) by mr2.surnet.cl ([216.155.73.169]); Fri, 29 Jul 2005 13:21:47 +0000 Received: from cluster.surnet.cl (216.155.73.164) by smtp1.surnet.cl (7.0.031.3) id 42587C6E012F051D; Fri, 29 Jul 2005 09:21:38 -0400 Received: from alvh.no-ip.org (200.85.218.66) by cluster.surnet.cl (7.0.043) (authenticated as alvherre@surnet.cl) id 42B3EF60005D5F25; Fri, 29 Jul 2005 09:22:17 -0400 Received: by alvh.no-ip.org (Postfix, from userid 1000) id 7426DC2D450; Fri, 29 Jul 2005 09:23:19 -0400 (CLT) Date: Fri, 29 Jul 2005 09:23:19 -0400 From: Alvaro Herrera To: Luke Lonergan Cc: Andrew McMillan , Matthew Schumacher , pgsql-performance@postgresql.org Subject: Re: Performance problems testing with Spamassassin Message-ID: <20050729132319.GA13680@alvh.no-ip.org> Mail-Followup-To: Luke Lonergan , Andrew McMillan , Matthew Schumacher , pgsql-performance@postgresql.org References: <3E37B936B592014B978C4415F90D662D0C4221@MI8NYCMAIL06.Mi8.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3E37B936B592014B978C4415F90D662D0C4221@MI8NYCMAIL06.Mi8.com> User-Agent: Mutt/1.5.9i X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=1.427 tagged_above=0 required=5 tests=AWL, DNS_FROM_RFC_ABUSE, FORGED_RCVD_HELO, RCVD_IN_NJABL_PROXY X-Spam-Level: * X-Archive-Number: 200507/468 X-Sequence-Number: 13709 On Fri, Jul 29, 2005 at 03:01:07AM -0400, Luke Lonergan wrote: > I guess we see the real culprit here. Anyone surprised it's the WAL? So what? Are you planning to suggest people to turn fsync=false? I just had a person lose 3 days of data on some tables because of that, even when checkpoints were 5 minutes apart. With fsync off, there's no work _at all_ going on, not just the WAL -- heap/index file fsync at checkpoint is also skipped. This is no good. -- Alvaro Herrera () "In a specialized industrial society, it would be a disaster to have kids running around loose." (Paul Graham)