Received: from localhost (maia-5.hub.org [200.46.204.182]) by postgresql.org (Postfix) with ESMTP id 1486B9FBE89 for ; Wed, 30 May 2007 11:11:16 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.182]) (amavisd-maia, port 10024) with ESMTP id 29751-02 for ; Wed, 30 May 2007 11:11:06 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.5 Received: from main2.mycybernet.net (main2.mycybernet.net [209.222.63.140]) by postgresql.org (Postfix) with ESMTP id 735EC9FBEA9 for ; Wed, 30 May 2007 11:11:11 -0300 (ADT) Received: from 227-54-222-209.mycybernet.net ([209.222.54.227] helo=phlogiston.dydns.org) by main2.mycybernet.net with esmtp (Exim 4.62) (envelope-from ) id 1HtOtK-0005i1-7J for pgsql-performance@postgresql.org; Wed, 30 May 2007 10:11:10 -0400 Received: by phlogiston.dydns.org (Postfix, from userid 1000) id A42614050; Wed, 30 May 2007 10:11:04 -0400 (EDT) Date: Wed, 30 May 2007 10:11:04 -0400 From: Andrew Sullivan To: pgsql-performance@postgresql.org Subject: Re: Vacuum takes forever Message-ID: <20070530141104.GE16260@phlogiston.dyndns.org> References: <1180458223.18930.16.camel@panoramix> <1180461367.18930.25.camel@panoramix> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1180461367.18930.25.camel@panoramix> User-Agent: Mutt/1.5.9i X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200705/611 X-Sequence-Number: 25001 On Tue, May 29, 2007 at 07:56:07PM +0200, Joost Kraaijeveld wrote: > Thanks, I tried it and it worked. I did not know that changing this > setting would result in such a performance drop ( I just followed an It's not a performance drop. It's an on-purpose delay of the functionality, introduced so that _other_ transactions don't get I/O starved. ("Make vacuum fast" isn't in most cases an interesting goal.) A -- Andrew Sullivan | ajs@crankycanuck.ca I remember when computers were frustrating because they *did* exactly what you told them to. That actually seems sort of quaint now. --J.D. Baldwin