From owner-freebsd-questions@FreeBSD.ORG Tue Oct 20 08:56:00 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 675DF106566B for ; Tue, 20 Oct 2009 08:56:00 +0000 (UTC) (envelope-from cjk32@cam.ac.uk) Received: from ppsw-5.csi.cam.ac.uk (ppsw-5.csi.cam.ac.uk [131.111.8.135]) by mx1.freebsd.org (Postfix) with ESMTP id ED9BB8FC0A for ; Tue, 20 Oct 2009 08:55:59 +0000 (UTC) X-Cam-AntiVirus: no malware found X-Cam-SpamDetails: not scanned X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/ Received: from nat2.cjkey.org.uk ([88.97.163.221]:24801 helo=[192.168.2.58]) by ppsw-5.csi.cam.ac.uk (smtp.hermes.cam.ac.uk [131.111.8.155]:465) with esmtpsa (PLAIN:cjk32) (TLSv1:DHE-RSA-AES256-SHA:256) id 1N0AVa-0003S6-IE (Exim 4.70) (return-path ); Tue, 20 Oct 2009 09:55:58 +0100 Message-ID: <4ADD7B1D.7020803@cam.ac.uk> Date: Tue, 20 Oct 2009 09:55:57 +0100 From: Christopher Key User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 To: Carl Chave References: <4ADC5318.2010706@cam.ac.uk> In-Reply-To: X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: ZFS: Strange performance issues X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 20 Oct 2009 08:56:00 -0000 Carl Chave wrote: > relatively idle. You can request a more accurate view of current > bandwidth usage by specifying > an interval. Thanks Carl, I was aware of the option, the posted stats were from: # zpool iostat -v 10 with the 10s period wholly within the ~40s transfer time. King regards, Chris