Received: from localhost (maia-3.hub.org [200.46.204.184]) by postgresql.org (Postfix) with ESMTP id ED1729FB319 for ; Sat, 19 May 2007 19:38:48 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.184]) (amavisd-maia, port 10024) with ESMTP id 50506-07 for ; Sat, 19 May 2007 19:38:30 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.5 Received: from floppy.pyrenet.fr (news.pyrenet.fr [194.116.145.2]) by postgresql.org (Postfix) with ESMTP id 54EB39FB31D for ; Sat, 19 May 2007 19:38:15 -0300 (ADT) Received: by floppy.pyrenet.fr (Postfix, from userid 106) id A168E30909; Sun, 20 May 2007 00:38:12 +0200 (MET DST) From: Ron Mayer X-Newsgroups: pgsql.performance Subject: Re: Background vacuum Date: Sat, 19 May 2007 15:38:12 -0700 Organization: Hub.Org Networking Services Lines: 19 Message-ID: <464F7C54.7090902@cheapcomplexdevices.com> References: <4642A1B3.6030009@swissembedded.com> <4642A811.9010703@drivefaster.net> <4643B490.2040704@cheapcomplexdevices.com> <20070517135530.GI6907@phlogiston.dyndns.org> <464D04F8.7020306@cheapcomplexdevices.com> <464D18CE.8070408@cheapcomplexdevices.com> <18134.1179458524@sss.pgh.pa.us> <464DFCC3.8040207@cheapcomplexdevices.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@news.hub.org To: Greg Smith User-Agent: Icedove 1.5.0.10 (X11/20070329) In-Reply-To: To: pgsql-performance@postgresql.org X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200705/373 X-Sequence-Number: 24763 Greg Smith wrote: > > Let's break this down into individual parts: Great summary. > 4) Is vacuuming a challenging I/O demand? Quite. > > Add all this up, and that fact that you're satisfied with how nice has > worked successfully for you doesn't have to conflict with an opinion > that it's not the best approach for controlling vacuuming. I just > wouldn't extrapolate your experience too far here. I wasn't claiming it's a the best approach for vacuuming.