Received: from localhost (unknown [200.46.204.182]) by postgresql.org (Postfix) with ESMTP id 7DDEC9F95DC for ; Fri, 9 Nov 2007 12:56:09 -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 03496-07-3 for ; Fri, 9 Nov 2007 12:55:51 -0400 (AST) Received: from wx-out-0506.google.com (wx-out-0506.google.com [66.249.82.233]) by postgresql.org (Postfix) with ESMTP id F0A849F96CC for ; Fri, 9 Nov 2007 12:55:52 -0400 (AST) Received: by wx-out-0506.google.com with SMTP id r21so353361wxc for ; Fri, 09 Nov 2007 08:55:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=beta; 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=A4B8/wr+TtVi3w15oDctiM5oyA79gXTkGpf8I14YA3E=; b=tjWo5cMMW9zqjoEOpiG3G0oOnUPc+eCe5rt9rFQWl+Vt+oPVmeA5OuOFWqA/hp6oCCKa+Eh62OwtrPpxnnG6w3C5n+DGjYn4nMk2p7+f4k7f2qrwlGeKlhniCozGi9MjrJFARvFM4JzC/qzFrfgsO5gG6TuvKWqHCZl06vd5Wak= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=jrQY6N2r/aySWF0vJAtlQsa0i+c5TTDDp7ZQ9wMXqxmi21UJtJfu0HKEdY40bSykqlz8cK4h4694yjVFEkpe1Lf2k2W0NpdBrilYrfb/K4JmAfj+H8Qi/xmBpR3vYYzmdsH8+MJv0lrdjSwsSAo1jJWlpuAkmYm7fA5ye2BmEMU= Received: by 10.66.242.5 with SMTP id p5mr939296ugh.1194627346071; Fri, 09 Nov 2007 08:55:46 -0800 (PST) Received: by 10.67.95.18 with HTTP; Fri, 9 Nov 2007 08:55:45 -0800 (PST) Message-ID: Date: Fri, 9 Nov 2007 10:55:45 -0600 From: "Scott Marlowe" To: "Claus Guttesen" Subject: Re: dell versus hp Cc: "Jurgen Haan" , "Tore Halset" , pgsql-performance@postgresql.org In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <82607932-FC46-4B73-BF78-2290EE55F7F5@pvv.ntnu.no> <47348444.6000700@easyflex.nl> X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200711/143 X-Sequence-Number: 27558 On Nov 9, 2007 10:40 AM, Claus Guttesen wrote: > > Apart from the disks, you might also investigate using Opterons instead > > of Xeons. there appears to be some significant dent in performance > > between Opteron and Xeon. Xeons appear to spend more time in passing > > around ownership of memory cache lines in case of a spinlock. > > It's not yet clear whether or not here has been worked around the issue. > > You should at least investigate it a bit. > > > > We're using a HP DL385 ourselves which performs quite well. > > Not atm. Until new benchmarks are published comparing AMD's new > quad-core with Intel's ditto, Intel has the edge. > > http://tweakers.net/reviews/657/6 For 8 cores, it appears AMD has the lead, read this (stolen from another thread): http://people.freebsd.org/~kris/scaling/7.0%20Preview.pdf