From owner-freebsd-hackers Tue Mar 20 9:55:25 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from earth.backplane.com (earth-nat-cw.backplane.com [208.161.114.67]) by hub.freebsd.org (Postfix) with ESMTP id C050437B73F; Tue, 20 Mar 2001 09:55:21 -0800 (PST) (envelope-from dillon@earth.backplane.com) Received: (from dillon@localhost) by earth.backplane.com (8.11.2/8.9.3) id f2KHstW94364; Tue, 20 Mar 2001 09:54:55 -0800 (PST) (envelope-from dillon) Date: Tue, 20 Mar 2001 09:54:55 -0800 (PST) From: Matt Dillon Message-Id: <200103201754.f2KHstW94364@earth.backplane.com> To: "Michael C . Wu" Cc: Alfred Perlstein , "Michael C . Wu" , grog@FreeBSD.ORG, fs@FreeBSD.ORG, hackers@FreeBSD.ORG Subject: Re: tuning a VERY heavily (30.0) loaded server References: <20010320111144.A51924@peorth.iteration.net> <20010320092717.R29888@fw.wintelcom.net> <20010320113818.B52586@peorth.iteration.net> Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG :md0/MFS is used for caching the articles that BBS users read. :They often read the same articles over and over again, :and we find that a 128MB MFS/md0 will have 70% hitrate : :When our MFS/md0 fills up after long usage, the box easily :dies. (We crontab clean the mfs, but sometimes the load :shoots up for no reason and is not able to clean the mfs in time.) :If we dont do this cache, the data for the bulletin boards Definitely throw away MFS. A normal filesystem is plenty good enough for caching articles that BBS users read. MFS will just waste memory unnecessarily. It does seem to me that you might not have sufficient swap configured either, as per Ted's thought. With 2.5G of physical memory, You should have *AT LEAST* 3G of configured swap. I would recommend a 1G swap partition on each of your three 9G drives (for 3G total). -Matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message