From owner-freebsd-performance@FreeBSD.ORG Mon May 2 23:38:00 2005 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BCFCE16A4CE; Mon, 2 May 2005 23:38:00 +0000 (GMT) Received: from multiplay.co.uk (www1.multiplay.co.uk [212.42.16.7]) by mx1.FreeBSD.org (Postfix) with ESMTP id E58EB43D49; Mon, 2 May 2005 23:37:59 +0000 (GMT) (envelope-from killing@multiplay.co.uk) Received: from vader ([212.135.219.179]) by multiplay.co.uk (multiplay.co.uk [212.42.16.7]) (MDaemon.PRO.v8.0.1.R) with ESMTP id md50001376720.msg; Tue, 03 May 2005 00:33:37 +0100 Message-ID: <002c01c54f6f$da10deb0$b3db87d4@multiplay.co.uk> From: "Steven Hartland" To: References: <19879.1115061648@critter.freebsd.dk> <00fe01c54f61$df220d60$b3db87d4@multiplay.co.uk> <4276A6CC.3000108@alumni.rice.edu> Date: Tue, 3 May 2005 00:36:59 +0100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2527 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 X-Spam-Processed: multiplay.co.uk, Tue, 03 May 2005 00:33:37 +0100 (not processed: message from valid local sender) X-MDRemoteIP: 212.135.219.179 X-Return-Path: killing@multiplay.co.uk X-MDAV-Processed: multiplay.co.uk, Tue, 03 May 2005 00:33:39 +0100 cc: Eric Anderson cc: Poul-Henning Kamp cc: Robert Watson cc: freebsd-performance@freebsd.org Subject: Re: Very low disk performance on 5.x X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 02 May 2005 23:38:00 -0000 On 5/2/2005 4:56 PM, Jonathan Noack Look at the difference in sys times for raw vs. filesystem reads. With > raw we're at 2.73s while reading from the filesystem requires 12.33s! > From my position of complete ignorance that seems like a lot... Indeed thats why I hit on using time as well as just the dd stats. Steve ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone (023) 8024 3137 or return the E.mail to postmaster@multiplay.co.uk.