Date: Tue, 20 Mar 2001 09:54:55 -0800 (PST) From: Matt Dillon <dillon@earth.backplane.com> To: "Michael C . Wu" <keichii@iteration.net> Cc: Alfred Perlstein <bright@wintelcom.net>, "Michael C . Wu" <keichii@iteration.net>, grog@FreeBSD.ORG, fs@FreeBSD.ORG, hackers@FreeBSD.ORG Subject: Re: tuning a VERY heavily (30.0) loaded server Message-ID: <200103201754.f2KHstW94364@earth.backplane.com> References: <20010320111144.A51924@peorth.iteration.net> <20010320092717.R29888@fw.wintelcom.net> <20010320113818.B52586@peorth.iteration.net>
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: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
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