X-Original-To: pgsql-hackers-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id DBEC9D8EA1 for ; Thu, 29 Sep 2005 15:16:02 -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 12139-05 for ; Thu, 29 Sep 2005 18:15:45 +0000 (GMT) Received: from mail23.sea5.speakeasy.net (mail23.sea5.speakeasy.net [69.17.117.25]) by svr1.postgresql.org (Postfix) with ESMTP id B361ED9C51 for ; Thu, 29 Sep 2005 15:15:44 -0300 (ADT) Received: (qmail 4512 invoked from network); 29 Sep 2005 18:15:42 -0000 Received: from dsl081-060-184.sfo1.dsl.speakeasy.net (HELO noodles) ([64.81.60.184]) (envelope-sender ) by mail23.sea5.speakeasy.net (qmail-ldap-1.03) with RC4-MD5 encrypted SMTP for ; 29 Sep 2005 18:15:41 -0000 Subject: Re: [PERFORM] A Better External Sort? From: "Jeffrey W. Baker" To: josh@agliodbs.com Cc: pgsql-hackers@postgresql.org In-Reply-To: <200509291103.27344.josh@agliodbs.com> References: <1128015863.11474.9.camel@noodles> <200509291103.27344.josh@agliodbs.com> Content-Type: text/plain Date: Thu, 29 Sep 2005 11:15:41 -0700 Message-Id: <1128017741.11474.13.camel@noodles> Mime-Version: 1.0 X-Mailer: Evolution 2.2.1.1 Content-Transfer-Encoding: 7bit X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=0.023 required=5 tests=[AWL=0.023] X-Spam-Level: X-Archive-Number: 200509/1383 X-Sequence-Number: 73780 On Thu, 2005-09-29 at 11:03 -0700, Josh Berkus wrote: > Jeff, > > > Josh, do you happen to know how many passes are needed in the multiphase > > merge on your 60GB table? > > No, any idea how to test that? I would just run it under the profiler and see how many times beginmerge() is called. -jwb