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Date:      Tue, 20 Mar 2001 12:01:12 -0600
From:      "Michael C . Wu" <keichii@iteration.net>
To:        izero@ms26.hinet.net, cross@math.psu.edu
Cc:        Alfred Perlstein <bright@wintelcom.net>, "Michael C . Wu" <keichii@iteration.net>, dillon@FreeBSD.ORG, grog@FreeBSD.ORG, fs@FreeBSD.ORG, hackers@FreeBSD.ORG
Subject:   Re: tuning a VERY heavily (30.0) loaded scerver
Message-ID:  <20010320120112.C52586@peorth.iteration.net>
In-Reply-To: <20010320113818.B52586@peorth.iteration.net>; from keichii@iteration.net on Tue, Mar 20, 2001 at 11:38:18AM -0600
References:  <20010320111144.A51924@peorth.iteration.net> <20010320092717.R29888@fw.wintelcom.net> <20010320113818.B52586@peorth.iteration.net>

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MRTG Graph at
http://zoonews.ee.ntu.edu.tw/mrtg/zoo.html

| 
| FreeBSD zoo.ee.ntu.edu.tw 4.2-STABLE FreeBSD 4.2-STABLE 
| #0: Tue Mar 20 11:10:46 CST 2001     root@:/usr/src/sys/compile/SimFarm  i386
| 
| | > system stats at 
| | > http://zoo.ee.ntu.edu.tw/~keichii/
| 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
| 

Another problem is that we have around 4000+ processes accessing
lots of SHM at the same time..

The *UGLY* source code for the BBS is at 
http://zoo.ee.ntu.edu.tw/~keichii/zoo_bbsd_src.tgz

We can only provide crash dumps for trusted people because
of the thousands of passwords in the dump.

-- 
+-----------------------------------------------------------+
| keichii@iteration.net         | keichii@freebsd.org       |
| http://iteration.net/~keichii | Yes, BSD is a conspiracy. |
+-----------------------------------------------------------+

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