Received: from localhost (unknown [200.46.204.183]) by mail.postgresql.org (Postfix) with ESMTP id 63D6264FE0F for ; Thu, 6 Nov 2008 12:07:09 -0400 (AST) Received: from mail.postgresql.org ([200.46.204.86]) by localhost (mx1.hub.org [200.46.204.183]) (amavisd-maia, port 10024) with ESMTP id 78090-09 for ; Thu, 6 Nov 2008 12:07:09 -0400 (AST) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from rv-out-0506.google.com (rv-out-0506.google.com [209.85.198.238]) by mail.postgresql.org (Postfix) with ESMTP id 6635764FE05 for ; Thu, 6 Nov 2008 12:07:08 -0400 (AST) Received: by rv-out-0506.google.com with SMTP id b25so674074rvf.43 for ; Thu, 06 Nov 2008 08:07:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:cc:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=ctA8YK2I70bHhLU1inyg9fRPmqoJLnBnTMZL0oEwJrs=; b=JKUpSo7LCTrwiojYw4GCBLMdG6NXCIe/B+U3YmCjRuxUTsc0mctX3zC+FtQ+qcXEey hRZy52zOcf85OS7WTCDAZ3gPLZ/1iAiTKc3PoePhaNzI+srptM/YGCslvIWTEkez3udy g7R2y8dDpfOveJ8JUghDbUNofF0smgI8i2g10= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=qyCsvLorLRtwfBkEzWlfmiNRT2XYSjaGsp/Y7QaCSxoTbFoP6GWMo6X0zabPtrnq6d ajwT261WXlhOThE0kDTMT8gM+sm7Rni24zaSmluh5B+CwRNBdcVDK10XdMfxFEpo+gUJ Qe9jVDBoBgYY4HZBtsIJE4MXinr0Oa5Qrg0e0= Received: by 10.114.255.1 with SMTP id c1mr793156wai.4.1225987626068; Thu, 06 Nov 2008 08:07:06 -0800 (PST) Received: by 10.114.39.11 with HTTP; Thu, 6 Nov 2008 08:07:06 -0800 (PST) Message-ID: Date: Thu, 6 Nov 2008 09:07:06 -0700 From: "Scott Marlowe" To: "David Rees" Subject: Re: Occasional Slow Commit Cc: "Peter Schuller" , pgsql-performance@postgresql.org In-Reply-To: <72dbd3150811060747u7f3c2aadv3c6658d285d74455@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <72dbd3150810271723w57859013v9c4e3718ae86fba@mail.gmail.com> <72dbd3150810291530q7a95da64j2c39354de9ad91d1@mail.gmail.com> <72dbd3150810311714s51639bc3kfdbe03a7b51bc55c@mail.gmail.com> <72dbd3150811051925n50ead40cn30354990ebb8bfb6@mail.gmail.com> <20081106102147.GB70379@hyperion.scode.org> <72dbd3150811060747u7f3c2aadv3c6658d285d74455@mail.gmail.com> X-Archive-Number: 200811/28 X-Sequence-Number: 31759 On Thu, Nov 6, 2008 at 8:47 AM, David Rees wrote: > > In the case of the machines without a BBU on them, they are configured > to be in WriteBack, but are actually running in WriteThrough. I'm pretty sure the LSIs will refuse to actually run in writeback without a BBU.