Received: from localhost (unknown [200.46.208.211]) by mail.postgresql.org (Postfix) with ESMTP id B95C663267C for ; Mon, 11 Jan 2010 19:29:42 -0400 (AST) Received: from mail.postgresql.org ([200.46.204.86]) by localhost (mx1.hub.org [200.46.208.211]) (amavisd-maia, port 10024) with ESMTP id 27652-09 for ; Mon, 11 Jan 2010 23:29:26 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from ey-out-2122.google.com (ey-out-2122.google.com [74.125.78.24]) by mail.postgresql.org (Postfix) with ESMTP id D2DF66326CE for ; Mon, 11 Jan 2010 19:29:31 -0400 (AST) Received: by ey-out-2122.google.com with SMTP id 22so3700062eye.33 for ; Mon, 11 Jan 2010 15:29:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=joFjdXuhrIqXmn6Ep5vlLkiEAA+svt9x+HJbe9wL/Xc=; b=bL+c4+2hQDjDSEdygvwW7iG1ggF1OdW/e4SI2egGG9wb7TPkBp0+Y4s7CcR+zW2eK6 ipjZsdHotmFJ+GND9/uhbHev7RjShzkfDJ6Fti5FpqRpY2oeg5UVqq5NPU488ghuVtlW RNYMbG5Kc0rzn5WaEpPVE9v2BLivyhIpWefrQ= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=vVFBQNqjOKuSIk0nrFsQKc55oHVgzwSoyNbxCIgl7PSg6pLsbnggPLzD5BlT8990E1 +3W546/n4t2gRkDk4ONy9U3iB3vu3sWI1TF9guEjgQUKFC9doFFpxGbZzgzcBcBql4UE wKIDo0mrF0BEOr+gnbgBxCn0oQd5bKjG4SyXg= MIME-Version: 1.0 Received: by 10.216.89.18 with SMTP id b18mr2169045wef.14.1263252569633; Mon, 11 Jan 2010 15:29:29 -0800 (PST) In-Reply-To: <4B4BB174.6020608@2ndquadrant.com> References: <61039b861001110544o2c352763q13dcf9d78a156714@mail.gmail.com> <61039b861001110842g15bb1f26jc50b6e6762e01427@mail.gmail.com> <61039b861001110949n699f0bd1pf3c878fa4c739891@mail.gmail.com> <4B4BA058.4070703@2ndquadrant.com> <4B4BB174.6020608@2ndquadrant.com> Date: Mon, 11 Jan 2010 16:29:29 -0700 Message-ID: Subject: Re: performance config help From: Scott Marlowe To: Greg Smith Cc: Bob Dusek , pgsql-performance@postgresql.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-2.35 tagged_above=-10 required=5 tests=AWL=0.249, BAYES_00=-2.599 X-Spam-Level: X-Archive-Number: 201001/229 X-Sequence-Number: 37109 On Mon, Jan 11, 2010 at 4:17 PM, Greg Smith wrote: > Scott Marlowe wrote: >> >> The DDR3 Nehalem and DDR2 AMD are both actually pretty close in real >> world use on 4 or more socket machines. =A0Most benchmarks on memory >> bandwidth give no huge advantage to either one or the other. =A0They >> both max out at about 25GB/s. >> > > The most fair comparison I've seen so far is > http://www.advancedclustering.com/company-blog/stream-benchmarking.html > which puts the faster Intel solutions at 37GB/s, while the Opterons bog d= own > at 20GB/s. =A0That matches my own tests pretty well too--Intel's got at l= east > a 50% lead here in many cases. But that's with only 2 sockets. I'd like to see something comparing 4 or 8 socket machines. Hmmm, off to googol.