Received: from localhost (unknown [200.46.204.183]) by mail.postgresql.org (Postfix) with ESMTP id 4C33564FDA9 for ; Mon, 8 Dec 2008 12:35:12 -0400 (AST) Received: from mail.postgresql.org ([200.46.204.86]) by localhost (mx1.hub.org [200.46.204.183]) (amavisd-maia, port 10024) with ESMTP id 70614-07 for ; Mon, 8 Dec 2008 12:35:09 -0400 (AST) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from wf-out-1314.google.com (wf-out-1314.google.com [209.85.200.168]) by mail.postgresql.org (Postfix) with ESMTP id 4B05764FD73 for ; Mon, 8 Dec 2008 12:35:09 -0400 (AST) Received: by wf-out-1314.google.com with SMTP id 25so1242787wfc.28 for ; Mon, 08 Dec 2008 08:35:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; 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=lpod5pk8hj1X/swBM4/wyjEm4h18GEyNAg61L1eQBxE=; b=WmAaqs8ciolShFgKtUD4ZnRaogaI07/c1JQuOzxv+JV622+8xw1X22QAVR2OnKJKbD WYR52kqu2J0nJ8EqPUk9DicuMa2E6HY5Dt4AOrcCFQGuGN5x1TQ5Uvt41g7ptf6oAhBP XSijqHOf9KQEVtzvWS3vBhDEIcQNGCrc6CIV8= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=o5VNZw+4cBcgRsEhtioMT+qesnsLGH96Baq9PmNXnCsqsFDk2pExkhZ8pjwziKWho+ L8eTgXlxU5Ac9W7dRNX+8z024CioTJzKLefe8UyJB5XphpLJZS/t26PIOkuLi0Fa3qfa IqzJSc0P6KJMiR0T0OS8WUg30WMrTr3OHWt6c= Received: by 10.114.181.13 with SMTP id d13mr2513547waf.109.1228754108318; Mon, 08 Dec 2008 08:35:08 -0800 (PST) Received: by 10.114.133.4 with HTTP; Mon, 8 Dec 2008 08:35:08 -0800 (PST) Message-ID: Date: Mon, 8 Dec 2008 09:35:08 -0700 From: "Scott Marlowe" To: "Rafael Domiciano" Subject: Re: Vacuum Problems Cc: "Matthew T. O'Connor" , "Rafael Martinez" , "pgsql-admin@postgresql.org" In-Reply-To: <3a0028490812080829t1f485ec3g66626e8c4e2b610c@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <3a0028490811260543x74d02719w775a457999cfc74@mail.gmail.com> <3a0028490811260921l5d6aac06v54dca32aae672b97@mail.gmail.com> <492DA95D.3010303@zeut.net> <3a0028490812080504x22618c6fxd7df8febaadb1632@mail.gmail.com> <3a0028490812080811r1c8a4756i1a1a514911741def@mail.gmail.com> <3a0028490812080829t1f485ec3g66626e8c4e2b610c@mail.gmail.com> X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=0 tagged_above=0 required=5 tests=none X-Spam-Level: X-Archive-Number: 200812/54 X-Sequence-Number: 30887 On Mon, Dec 8, 2008 at 9:29 AM, Rafael Domiciano wrote: > 1 Drive Only. This server has no RAID. > Do you think that the I/O is very high and I'm needing a RAID?! Not necessarily. Like I said, my laptop currently is about 25 to 30 times faster writing to disk than your server. So, I think something is wrong. Try doing this, run vmstat 1, and while that's running, in another window, do something like: time dd if=/dev/zero of=/mnt/myslowdrive/testfile bs=1000000 count=500 time dd of=/dev/null if=/mnt/myslowdrive/testfile and see what vmstat says while that's running, and how long it takes. I'm guessing something is very wrong and you'll get really low numbers.