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Date:      Tue,  1 Mar 2005 21:01:22 -0500
From:      Bruce Campbell <bruce@sciborg.uwaterloo.ca>
To:        freebsd-questions@freebsd.org
Subject:   Had to revert from 5.3 to 4.11
Message-ID:  <1109728882.42251e7274c92@www.nexusmail.uwaterloo.ca>

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Upgraded a large e-mail server from 4.7 to 5.3 late December/2004

The 5.3 system never stayed up for more than 3 days (kernel panics
- often while running "vacation").

A fair bit of fiddling trying to keep it running for about a month,
then gave up.  Kept the kernel tree updated, no difference.

Reverted to 4.11 about 3 weeks ago, no problems since.

Also upgraded a web server to 5.3 during that time, and
had to retreat also, same reasons.

We do have a heavily loaded 5.2.1 system running well.

Main difference between the crashy and reliable system
is nfs home dirs on the mail and web servers.  nfs server
is 4.7

Same hardware in all cases, dual xeon supermicro.

At a later time we will invest further diagnostic effort.
Sorry for the lack of specifics.

-- 
Bruce Campbell
Manager, Science Computing
CPH-2374B
University of Waterloo
(519)888-4567 ext 6991

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