Received: from localhost (maia-3.hub.org [200.46.204.184]) by postgresql.org (Postfix) with ESMTP id 81EE79FA12B for ; Fri, 1 Dec 2006 11:32:13 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.184]) (amavisd-new, port 10024) with ESMTP id 84002-04 for ; Fri, 1 Dec 2006 11:31:56 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey-1.7.4 Received: from skunk.mtbrook.bozemanpass.com (skunk.mtbrook.bozemanpass.com [69.145.82.195]) by postgresql.org (Postfix) with ESMTP id 9EC759FA1FE for ; Fri, 1 Dec 2006 11:32:02 -0400 (AST) Received: from [69.145.82.249] (unknown [69.145.82.249]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by skunk.mtbrook.bozemanpass.com (Postfix) with ESMTP id 85D515583D2; Fri, 1 Dec 2006 07:32:00 -0800 (PST) Message-ID: <45704AF3.9090309@boreham.org> Date: Fri, 01 Dec 2006 08:32:03 -0700 From: David Boreham User-Agent: Mozilla Thunderbird 1.0.7 (Windows/20050923) X-Accept-Language: en-us, en MIME-Version: 1.0 To: carlos.reimer@opendb.com.br CC: pgsql-performance@postgresql.org Subject: Re: RES: Bad iostat numbers References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200612/7 X-Sequence-Number: 22063 Carlos H. Reimer wrote: >I´ve taken a look in the /var/log/messages and found some temperature >messages about the disk drives: > >Nov 30 11:08:07 totall smartd[1620]: Device: /dev/sda, Temperature changed 2 >Celsius to 51 Celsius since last report > >Can this temperature influence in the performance? > > it can influence 'working-ness' which I guess in turn affects performance ;) But I'm not sure if 50C is too high for a disk drive, it might be ok. If you are able to, I'd say just replace the drives and see if that improves things.