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Date:      Fri, 16 Nov 2007 01:36:47 +0100
From:      Peter Schuller <peter.schuller@infidyne.com>
To:        freebsd-fs@freebsd.org
Cc:        freebsd-current@freebsd.org, Ivan Voras <ivoras@freebsd.org>
Subject:   Re: ZFS & MySQL
Message-ID:  <200711160136.56551.peter.schuller@infidyne.com>
In-Reply-To: <fhhh7o$1s5$1@ger.gmane.org>
References:  <fhhh7o$1s5$1@ger.gmane.org>

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[-- Attachment #1 --]
> Can somebody who has done MySQL benchmarks (e.g. Kris Kennaway, but I
> don't want to point fingers :) ) try them when MySQL is hosted on ZFS?
> I'm currently having a problem where mysqld gets stuck in "zfs" state
> and it becomes completely unusable and unkillable. The machine generally
> works, but cannot be rebooted from the OS in this case (it must be
> manually power-cycled).

I had an unkillable MySQLd a while ago that required reboot (pre-RELENG_7 
CURRENT). It was in uninterruptable sleep, but I can't swear to whether it 
was in zfs state. This was on a quadcore core 2 duo.

I can do some sysbenching on a dual core machine with and without ZFS, but it 
sounds like that won't be more useful than what you already have available.

-- 
/ Peter Schuller

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