Received: from localhost (unknown [200.46.204.184]) by postgresql.org (Postfix) with ESMTP id B8AA02E266B for ; Thu, 27 Dec 2007 09:20:27 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.184]) (amavisd-maia, port 10024) with ESMTP id 94684-07 for ; Thu, 27 Dec 2007 09:20:06 -0400 (AST) Received: from lists.commandprompt.com (host-159.commandprompt.net [207.173.203.159]) by postgresql.org (Postfix) with ESMTP id E606F2E1EFF for ; Thu, 27 Dec 2007 09:20:22 -0400 (AST) Received: from perhan.alvh.no-ip.org (200-126-76-117.bk5-dsl.surnet.cl [200.126.76.117]) (authenticated bits=0) by lists.commandprompt.com (8.13.8/8.13.8) with ESMTP id lBRDK6tA011565 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 27 Dec 2007 05:20:09 -0800 Received: by perhan.alvh.no-ip.org (Postfix, from userid 1000) id 0B7F947C8A; Thu, 27 Dec 2007 10:20:03 -0300 (CLST) Date: Thu, 27 Dec 2007 10:20:03 -0300 From: Alvaro Herrera To: Tom Lane Cc: Greg Smith , Guillaume Smet , pgsql-performance , Stefan Kaltenbrunner , Devrim =?iso-8859-1?B?R9xORNxa?= Subject: Re: More shared buffers causes lower performances Message-ID: <20071227132002.GC5709@alvh.no-ip.org> 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> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <29359.1198735829@sss.pgh.pa.us> User-Agent: Mutt/1.5.17 (2007-11-01) X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0 (lists.commandprompt.com [207.173.203.159]); Thu, 27 Dec 2007 05:20:10 -0800 (PST) X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200712/406 X-Sequence-Number: 28222 Tom Lane escribió: > Currently the docs say that --enable-cassert > > Enables assertion checks in the server, which test for > many cannot happen conditions. This is invaluable for > code development purposes, but the tests slow things down a little. > > Maybe we ought to put that more strongly --- s/a little/significantly/, > perhaps? I don't think it will make any difference, because people don't read configure documentation. They read configure --help. -- Alvaro Herrera http://www.CommandPrompt.com/ PostgreSQL Replication, Consulting, Custom Development, 24x7 support