From owner-freebsd-questions Thu Sep 13 6:48:53 2001 Delivered-To: freebsd-questions@freebsd.org Received: from gekko.ms-agentur.de (server.ms-agentur.de [62.153.134.194]) by hub.freebsd.org (Postfix) with ESMTP id 5D0EC37B401 for ; Thu, 13 Sep 2001 06:48:49 -0700 (PDT) Received: from i-clue.de (automatix.i-clue.de [192.168.0.112]) by gekko.ms-agentur.de (8.9.3/8.9.3/SuSE Linux 8.9.3-0.1) with ESMTP id PAA17894; Thu, 13 Sep 2001 15:57:56 +0200 Message-ID: <3BA0B934.7070703@i-clue.de> Date: Thu, 13 Sep 2001 15:48:36 +0200 From: Christoph Sold User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; de-AT; rv:0.9.3+) Gecko/20010905 X-Accept-Language: de, en MIME-Version: 1.0 To: Matthias Bartels Cc: "questions@freebsd.org" Subject: Re: performance problem References: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Matthias Bartels wrote: >Servus, > >i have a serious performance problem with my harddisk. >My Harddisk runs as U/DMA 100 with soft updates enabled. > >I used the time command to measure the time that FreeBSD needs to >extract the actual ports collection (13MB) and it takes over 13 min to >complete the task. But the user time was less then 1 second!!! > >i have the same problem while removing files. > >During the execution i used the top command and it figured out that >the priority is -2 and sometimes -6. is that normal??? > >the state always switched between getblk and biowr > >The CPU idle is near 99% > >could anybody help me? > I could confirm your times. Anyhow, this is hardware related. On U160 SCSI hard disks, this job runs significantly faster. (I am not providing timing information since the system I checked this was not taken out of production for those tests.) Conclusion: if you want server performance, choose server hardware. HTH -Christoph Sold To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message