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Date: Mon, 24 Dec 2007 21:01:57 +0100
From: Kris Kennaway <kris@FreeBSD.org>
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To: Marten Vijn <info@martenvijn.nl>
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Cc: freebsd-current@freebsd.org
Subject: Re: sysctl and rsync question
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Marten Vijn wrote:
> Hi all, have two questions:
> 
> In sort:
> 
> 1. Which sysctl's can/should I change to prevent my backupserver (7.0
> BETA4) from rebooting by using rsync ?
> 
> 2. What tools are there to find out what causes the reboot? 

See the ZFS tuning guide on wiki.freebsd.org.

> I did not find any messages in /var/log/*, dmesg, vmstat and top  (dmesg
> below).

See the chapter on kernel debugging the developers handbook.  You have 
to enable crashdumps and/or DDB.

> I assume that it runs out ouf buffers.

Probably, the above will allow you to confirm and fix.

Kris