From owner-freebsd-performance@FreeBSD.ORG Sun Jan 4 02:52:24 2004 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 7ADE516A4CE for ; Sun, 4 Jan 2004 02:52:24 -0800 (PST) Received: from smtpzilla3.xs4all.nl (smtpzilla3.xs4all.nl [194.109.127.139]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4317D43D2D for ; Sun, 4 Jan 2004 02:52:22 -0800 (PST) (envelope-from cor@xs4all.nl) Received: from xs1.xs4all.nl (xs1.xs4all.nl [194.109.21.2]) by smtpzilla3.xs4all.nl (8.12.9/8.12.9) with ESMTP id i04AqLFt053739; Sun, 4 Jan 2004 11:52:21 +0100 (CET) Received: from xs1.xs4all.nl (cor@localhost.xs4all.nl [127.0.0.1]) by xs1.xs4all.nl (8.12.10/8.12.9) with ESMTP id i04AqLRo047913; Sun, 4 Jan 2004 11:52:21 +0100 (CET) (envelope-from cor@xs4all.nl) Received: (from cor@localhost) by xs1.xs4all.nl (8.12.10/8.12.9/Submit) id i04AqLPk047912; Sun, 4 Jan 2004 11:52:21 +0100 (CET) (envelope-from cor) Date: Sun, 4 Jan 2004 11:52:21 +0100 (CET) From: Cor Bosman Message-Id: <200401041052.i04AqLPk047912@xs1.xs4all.nl> To: freebsd-performance@freebsd.org Subject: slowdown on internal harddisks 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: Sun, 04 Jan 2004 10:52:24 -0000 Hi all, im running a large usenet setup (30+ servers, 20TB or so) and am running into some trouble with one of the servers. It's a dual Xeon 2.6, 4GB memory, mirrored 2 x 17GB / on ADAPTEC 2015S (asr) extra 70GB disk on the same asr controller, and 3 x 1.5 TB on Qlogic ISP 2300 PCI FC-AL Adapter (isp) set up as 6 750GB partitions. This server pushes out about 300mbit of data on an Intel Pro 1000 (em). Im also using a 1GB MFS which i need to support a very high amount of seeks on a usenet history file (300 MB used). As the server starts doing lots of io on the Qlogic controller all disk writes seem to drop to about 0. Also on the MFS, and on the internal asr controller. Copying a file from any disk to any other, even to the unused extra 70GB disk has a max throughput of about 50KB/s. Read performance is still ok, it's just write()s that are slow. (cp-ing to /dev/null is fast). Ive tried all kinds of tweaks but cant seem to find the cause of this. It's especially weird because another, identical, server, with the same load does not show this problem. Any ideas? Regards, Cor From owner-freebsd-performance@FreeBSD.ORG Mon Jan 5 00:48:11 2004 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 7183416A4CE for ; Mon, 5 Jan 2004 00:48:11 -0800 (PST) Received: from geminix.org (gen129.n001.c02.escapebox.net [213.73.91.129]) by mx1.FreeBSD.org (Postfix) with ESMTP id EE97343D2D for ; Mon, 5 Jan 2004 00:48:09 -0800 (PST) (envelope-from gemini@geminix.org) Message-ID: <3FF924C6.7040902@geminix.org> Date: Mon, 05 Jan 2004 09:48:06 +0100 From: Uwe Doering Organization: Private UNIX Site User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.5) Gecko/20031206 X-Accept-Language: en-us, en MIME-Version: 1.0 To: freebsd-performance@freebsd.org References: <200401041052.i04AqLPk047912@xs1.xs4all.nl> In-Reply-To: <200401041052.i04AqLPk047912@xs1.xs4all.nl> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Received: from gemini by geminix.org with asmtp (TLSv1:AES256-SHA:256) (Exim 3.36 #1) id 1AdQPA-000Pac-00; Mon, 05 Jan 2004 09:48:08 +0100 Subject: Re: slowdown on internal harddisks 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, 05 Jan 2004 08:48:11 -0000 Cor Bosman wrote: > Hi all, im running a large usenet setup (30+ servers, 20TB or so) and am > running into some trouble with one of the servers. > > It's a dual Xeon 2.6, 4GB memory, mirrored 2 x 17GB / on ADAPTEC 2015S (asr) > extra 70GB disk on the same asr controller, and 3 x 1.5 TB on > Qlogic ISP 2300 PCI FC-AL Adapter (isp) set up as 6 750GB partitions. > > This server pushes out about 300mbit of data on an Intel Pro 1000 (em). > Im also using a 1GB MFS which i need to support a very high amount of seeks > on a usenet history file (300 MB used). > > As the server starts doing lots of io on the Qlogic controller all disk writes > seem to drop to about 0. Also on the MFS, and on the internal asr controller. > Copying a file from any disk to any other, even to the unused extra 70GB > disk has a max throughput of about 50KB/s. Read performance is still ok, it's > just write()s that are slow. (cp-ing to /dev/null is fast). Try increasing the sysctl(8) variables 'vfs.hirunningspace' and 'vfs.lorunningspace', for instance to '8388608' and '6291456', respectively. Lots of pending read operations at the same time tend to throttle write operations. This is by (kernel) design in order to give priority to read operations. While the (lower) default values appear to work well with conventional "dumb" disk controllers we have found that they are insufficient for more sophisticated caching disk controllers. The effect of too low settings would be exactly what you're seeing: Good read response, but anemic write performance. Maybe that tweak helps in your case, too. Uwe -- Uwe Doering | EscapeBox - Managed On-Demand UNIX Servers gemini@geminix.org | http://www.escapebox.net From owner-freebsd-performance@FreeBSD.ORG Sat Dec 27 15:00:26 2003 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 ACF2E16A4CE; Sat, 27 Dec 2003 15:00:26 -0800 (PST) Received: from mhub-w6.tc.umn.edu (mhub-w6.tc.umn.edu [160.94.160.36]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3A89343D31; Sat, 27 Dec 2003 15:00:22 -0800 (PST) (envelope-from ryans@gamersimpact.com) Received: from [24.107.70.120] by mhub-w6.tc.umn.edu with ESMTP; Sat, 27 Dec 2003 17:00:21 -0600 From: Ryan Sommers To: Tanmay Ganacharya In-Reply-To: References: Content-Type: text/plain Message-Id: <1072566017.646.4.camel@localhost> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.5 Date: Sat, 27 Dec 2003 17:00:18 -0600 Content-Transfer-Encoding: 7bit X-Mailman-Approved-At: Sat, 10 Jan 2004 22:37:23 -0800 cc: freebsd-multimedia@freebsd.org cc: freebsd-performance@freebsd.org cc: freebsd-current@freebsd.org Subject: Re: Finding RTT's and RTO's 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: Sat, 27 Dec 2003 23:00:26 -0000 On Sat, 2003-12-27 at 16:50, Tanmay Ganacharya wrote: > Hello, > I am currently using FreeBSD 4.8. I am want to record RTT and RTO values of > a tcp connection. > Could anyone please tell me which variables in which files hold the current > RTT and RTO values. > Once known I can put printfs and print these values. > Thanks in advance, > Regards, > Tanmay Ganacharya > First off, didn't you post this a few days ago already? Or maybe you posted it to hackers@. Either way, people pointed you to net@. Why would you even cross post this to multimedia@ or performance@? -- Ryan "leadZERO" Sommers Gamer's Impact President ryans@gamersimpact.com ICQ: 1019590 AIM/MSN: leadZERO -= http://www.gamersimpact.com =- From owner-freebsd-performance@FreeBSD.ORG Sat Jan 3 18:54:16 2004 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 C854F16A4CE for ; Sat, 3 Jan 2004 18:54:16 -0800 (PST) Received: from web60704.mail.yahoo.com (web60704.mail.yahoo.com [216.109.117.227]) by mx1.FreeBSD.org (Postfix) with SMTP id 25BA643D69 for ; Sat, 3 Jan 2004 18:54:16 -0800 (PST) (envelope-from juostaus@yahoo.com) Message-ID: <20040104025415.22480.qmail@web60704.mail.yahoo.com> Received: from [65.34.125.98] by web60704.mail.yahoo.com via HTTP; Sat, 03 Jan 2004 18:54:15 PST Date: Sat, 3 Jan 2004 18:54:15 -0800 (PST) From: jon To: freebsd-performance@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailman-Approved-At: Sat, 10 Jan 2004 22:38:46 -0800 Subject: interested in your opinions of 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: Sun, 04 Jan 2004 02:54:16 -0000 http://docs.freebsd.org/cgi/getmsg.cgi?fetch=926273+0+current/freebsd-questions __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree