Received: from localhost (unknown [200.46.204.184]) by postgresql.org (Postfix) with ESMTP id 391969F9E04 for ; Sat, 22 Sep 2007 03:29:31 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.184]) (amavisd-maia, port 10024) with ESMTP id 60119-06 for ; Sat, 22 Sep 2007 03:29:06 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.5 Received: from westnet.com (westnet.com [216.187.52.2]) by postgresql.org (Postfix) with ESMTP id 057719F9DDB for ; Sat, 22 Sep 2007 03:29:17 -0300 (ADT) Received: from westnet.com (localhost [127.0.0.1]) by westnet.com (8.14.0/8.14.0) with ESMTP id l8M6THDA013089; Sat, 22 Sep 2007 02:29:17 -0400 (EDT) Received: from localhost (gsmith@localhost) by westnet.com (8.14.0/8.13.2/Submit) with ESMTP id l8M6THmg013085; Sat, 22 Sep 2007 02:29:17 -0400 (EDT) X-Authentication-Warning: westnet.com: gsmith owned process doing -bs Date: Sat, 22 Sep 2007 02:29:17 -0400 (EDT) From: Greg Smith X-X-Sender: gsmith@westnet.com To: brauagustin-susc@yahoo.com.ar cc: pgsql-performance@postgresql.org Subject: Re: Low CPU Usage In-Reply-To: <383851.67716.qm@web30009.mail.mud.yahoo.com> Message-ID: References: <383851.67716.qm@web30009.mail.mud.yahoo.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200709/396 X-Sequence-Number: 26941 On Thu, 20 Sep 2007, brauagustin-susc@yahoo.com.ar wrote: > Which other test can I do to find if this is a hardware, kernel o > postgres issue? The little test hdparm does is not exactly a robust hard drive benchmark. If you want to rule out hard drive transfer speed issues, take at look at the tests suggested at http://www.westnet.com/~gsmith/content/postgresql/pg-disktesting.htm and see how your results compare to the single SATA disk example I give there. -- * Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD