Received: from localhost (unknown [200.46.204.182]) by postgresql.org (Postfix) with ESMTP id 1FAF52E00F2 for ; Thu, 27 Dec 2007 13:01:46 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.182]) (amavisd-maia, port 10024) with ESMTP id 54404-06-3 for ; Thu, 27 Dec 2007 13:01:40 -0400 (AST) Received: from oxford.xeocode.com (76-10-150-5.dsl.teksavvy.com [76.10.150.5]) by postgresql.org (Postfix) with ESMTP id 4C0172E02A4 for ; Thu, 27 Dec 2007 12:44:39 -0400 (AST) Received: from localhost ([127.0.0.1] helo=oxford.xeocode.com) by oxford.xeocode.com with esmtp (Exim 4.67) (envelope-from ) id 1J7voo-0002S1-D9; Thu, 27 Dec 2007 16:42:50 +0000 To: "Greg Smith" Cc: "Alvaro Herrera" , "Tom Lane" , "Guillaume Smet" , "pgsql-performance" , "Stefan Kaltenbrunner" , Devrim =?iso-8859-1?Q?G=DCND=DCZ?= Subject: Re: More shared buffers causes lower performances In-Reply-To: (Greg Smith's message of "Thu\, 27 Dec 2007 10\:53\:43 -0500 \(EST\)") User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.1 (gnu/linux) X-Draft-From: ("nnimap+mail01.enterprisedb.com:INBOX" 55975) References: <1d4e0c10712251606q6f9503deye3da4b68c51bf5e@mail.gmail.com> <1198668065.4221.288.camel@ebony.site> <1d4e0c10712260741w1f141fd6x2f482143d526ad48@mail.gmail.com> <1d4e0c10712261352j2fbcd25ek1270331468d824b4@mail.gmail.com> <1d4e0c10712261453s4b171452g8aa30a1124f8fff1@mail.gmail.com> <29359.1198735829@sss.pgh.pa.us> <20071227132002.GC5709@alvh.no-ip.org> <87fxxow5qb.fsf@oxford.xeocode.com> From: Gregory Stark Organization: EnterpriseDB Date: Thu, 27 Dec 2007 16:42:44 +0000 Message-ID: <87bq8cw0l7.fsf@oxford.xeocode.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200712/416 X-Sequence-Number: 28232 "Greg Smith" writes: > The worst time people can run into a performance > regression is when they're running a popular benchmarking tool. Hm, perhaps pg_bench should do a "show debug_assertions" and print a warning if the answer isn't "off". We could encourage other benchmark software to do something similar. -- Gregory Stark EnterpriseDB http://www.enterprisedb.com Ask me about EnterpriseDB's RemoteDBA services!