Received: from makus.postgresql.org ([98.129.198.125]) by malur.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1TLcPd-0000J9-B7 for pgsql-performance@postgresql.org; Tue, 09 Oct 2012 16:12:05 +0000 Received: from digitaldogma.org ([69.12.222.85]) by makus.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1TLcPb-0004SE-1d for pgsql-performance@postgresql.org; Tue, 09 Oct 2012 16:12:04 +0000 Received: from david by digitaldogma.org with local (Exim 4.72) (envelope-from ) id 1TLcSG-0007A5-Dh; Tue, 09 Oct 2012 12:14:48 -0400 Date: Tue, 9 Oct 2012 12:14:48 -0400 From: David Thomas To: Craig James Cc: pgsql-performance@postgresql.org Subject: Re: Two identical systems, radically different performance Message-ID: <20121009161448.GA27123@digitaldogma.org> Reply-To: david@digitaldogma.org References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-URL: http://digitaldogma.org X-Uptime: 12:12:47 up 9 days, 14:03, 1 user, load average: 0.04, 0.06, 0.06 X-Editor: Vim http://vim.org User-Agent: Mutt/1.5.20 (2009-06-14) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: david@digitaldogma.org X-SA-Exim-Scanned: No (on digitaldogma.org); SAEximRunCond expanded to false X-Pg-Spam-Score: -4.0 (----) X-Archive-Number: 201210/82 X-Sequence-Number: 48041 On Mon, Oct 08, 2012 at 04:40:31PM -0700, Craig James wrote: > Nobody has commented on the hyperthreading question yet ... does it > really matter? The old (fast) server has hyperthreading disabled, and > the new (slower) server has hyperthreads enabled. > If hyperthreading is definitely NOT an issue, it will save me a trip to > the co-lo facility.