From owner-freebsd-current@FreeBSD.ORG Mon Jan 12 17:32:08 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 353BC16A4CE for ; Mon, 12 Jan 2004 17:32:08 -0800 (PST) Received: from cmsrelay01.mx.net (cmsrelay01.mx.net [165.212.11.110]) by mx1.FreeBSD.org (Postfix) with SMTP id 5D6C943D58 for ; Mon, 12 Jan 2004 17:31:48 -0800 (PST) (envelope-from noackjr@compgeek.com) Received: from uadvg128.cms.usa.net (165.212.11.128) by cmsoutbound.mx.net with SMTP; 13 Jan 2004 01:31:47 -0000 Received: from optimator.noacks.org [65.69.2.105] by uadvg128.cms.usa.net (ASMTP/noackjr@usa.net) via mtad (C8.MAIN.3.11E) with ESMTP id 598iamBft0246M28; Tue, 13 Jan 2004 01:31:45 GMT X-USANET-Auth: 65.69.2.105 AUTH noackjr@usa.net optimator.noacks.org Received: from localhost (localhost [127.0.0.1]) by optimator.noacks.org (Postfix) with ESMTP id AC7BE60F4; Mon, 12 Jan 2004 19:31:44 -0600 (CST) Received: from optimator.noacks.org ([127.0.0.1]) by localhost (optimator.noacks.org [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 05394-05; Mon, 12 Jan 2004 19:31:34 -0600 (CST) Received: from compgeek.com (compgeek [192.168.1.10]) by optimator.noacks.org (Postfix) with ESMTP id 132CC60ED; Mon, 12 Jan 2004 19:31:34 -0600 (CST) Message-ID: <40034AEE.5020004@compgeek.com> Date: Mon, 12 Jan 2004 19:33:34 -0600 From: Jon Noack User-Agent: Mozilla Thunderbird 0.5a (20040105) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Peter Losher References: <200401121659.26614.Peter_Losher@isc.org> In-Reply-To: <200401121659.26614.Peter_Losher@isc.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: by amavisd-new at noacks.org cc: current@freebsd.org Subject: Re: FreeBSD 5.x performance tips (ISC) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: noackjr@compgeek.com List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Jan 2004 01:32:08 -0000 First place I'd look would be the performance@ list, but that's just me ;-). Jon On 1/12/2004 6:59 PM, Peter Losher wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > So, as many of you know ISC hosts a quad-Xeon server running FreeBSD 5.1 > (-p10 to be precise) which hosts half of ftp.freebsd.org, etc. Many of you > helped out with some teething pains w/ virtual memory sizes, and kernel > panics. Thanks :) > > The issue with the system now is that while the kernel is SMP-aware, and as I > watch 5.2-REL get downloaded today, this system is like the arm muscle that > is developed to lift that barbell, but not enough blood is getting > everywhere, so the barbell is slowly moving up while the muscle cramps like > hell. In this case the system is ~70% idle, and around 150 processes are > locked and the performance starts to seriously decrease at times. (Entropy > stops getting collected, etc.) Not a pretty sight. The CPU's are all > spinlocking on an I/O channel. so high I/O translates into artificial high > cpu and load averages. > > So where can I look for pointers on how I can squeeze better performance out > of this configuration? I already have the usual sysctl entries installed. > Any chance moving to 5.2 will help the situation? > > Best Wishes - Peter