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Date: Thu, 16 Feb 2006 19:15:24 +1100
From: Peter Jeremy <peterjeremy@optushome.com.au>
To: Jiawei Ye <leafy7382@gmail.com>
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Cc: FreeBSD Current <freebsd-current@freebsd.org>
Subject: Re: sshd/telnetd stops responding under load
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On Thu, 2006-Feb-16 09:56:21 +0800, Jiawei Ye wrote:
>1. any CGI script that httpd invokes will not run.
>2. Static web pages are served normally (apache22)
>3. ftpd responds and works correctly. (pureftpd)
>4. Mail can be accepted but not processed properly
>
>My guess is that anything related to spawning a new shell does not
>work at this moment.

Or a filesystem deadlock.  I've seen these occasionally.

>freeze. Any ideas what errors  to look for?

Within ddb, "ps" and "show lockedvnods".  You could try running "ps -axl"
regularly and checking for processes that look like they're blocked in
the filesystem.

-- 
Peter Jeremy