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Date: Mon, 12 Dec 2005 22:23:20 +0100
From: Claus Guttesen <kometen@gmail.com>
To: Atanas <atanas@asd.aplus.net>
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References: <439DE88B.1090407@asd.aplus.net>
Cc: freebsd-stable@freebsd.org
Subject: Re: 6.0 random freezes
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> The load I'm talking about is less than moderate (less that 2.0 with
> plenty of CPU idle time). The freezing thing also does not appear to
> happen at peak times (I have rrdtool based CPU load graphs).
>
> Both machines have (almost) identical motherboards:
>
> Intel SE7520JR2SCSID2 and SE7520JR2ATAD2
> 2 Intel XeonE 3.2GHz 800MHz CPUs
> 4GB DDRII400 RegECC RAM
> Both machines boot with ACPI and hyperthreading enabled.

Try to disable HTT in bios. It seldom gives you very much, and
somtetimes degrades performance. Is it a webserver? If it generates
alot of temporary files you can try adding/changing the following in
/etc/sysctl.conf:

kern.ipc.somaxconn=3D2048
kern.maxfiles=3D65536
vfs.ufs.dirhash_maxmem=3D8388608

regards
Claus