X-Original-To: pgsql-performance-postgresql.org@postgresql.org Received: from localhost (mx1.hub.org [200.46.208.251]) by postgresql.org (Postfix) with ESMTP id 1B0129FA65C for ; Wed, 21 Jun 2006 18:18:34 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.208.251]) (amavisd-new, port 10024) with ESMTP id 51761-04 for ; Wed, 21 Jun 2006 18:18:27 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey- Received: from cassarossa.samfundet.no (cassarossa.samfundet.no [129.241.93.19]) by postgresql.org (Postfix) with ESMTP id 4C2739F9CC1 for ; Wed, 21 Jun 2006 18:18:27 -0300 (ADT) Received: from [2001:700:300:dc0f:216:3eff:fe40:5a47] (helo=trofast.sesse.net) by cassarossa.samfundet.no with esmtp (Exim 4.50) id 1FtA5g-0007aB-Lc for pgsql-performance@postgresql.org; Wed, 21 Jun 2006 23:18:25 +0200 Received: from sesse by trofast.sesse.net with local (Exim 3.36 #1 (Debian)) id 1FtA5g-0001Vl-00 for ; Wed, 21 Jun 2006 23:18:24 +0200 Date: Wed, 21 Jun 2006 23:18:24 +0200 From: "Steinar H. Gunderson" To: pgsql-performance@postgresql.org Subject: Re: Quick question about top... Message-ID: <20060621211824.GA5782@uio.no> Mail-Followup-To: pgsql-performance@postgresql.org References: <33c6269f0606211346m778a7d5di7a7d23bb2c6a1c96@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <33c6269f0606211346m778a7d5di7a7d23bb2c6a1c96@mail.gmail.com> X-Operating-System: Linux 2.6.16trofastxen on a x86_64 X-Message-Flag: Outlook? --> http://www.mozilla.org/products/thunderbird/ User-Agent: Mutt/1.5.11+cvs20060403 X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200606/422 X-Sequence-Number: 19779 On Wed, Jun 21, 2006 at 04:46:15PM -0400, Alex Turner wrote: > I have a really stupid question about top, what exactly is iowait CPU time? Time while the CPU is idle, but at least one I/O request is outstanding. In other words, if you're at 100% I/O-wait, you're heavily I/O-bound and your processor is bored to death. /* Steinar */ -- Homepage: http://www.sesse.net/