Date: Fri, 03 Jun 2011 23:18:49 +0200 From: Torfinn Ingolfsen <torfinn.ingolfsen@broadpark.no> To: freebsd-stable@freebsd.org Subject: Re: Fileserver panic - FreeBSD 8.1-stable and zfs Message-ID: <20110603231849.02fe4317.torfinn.ingolfsen@broadpark.no> In-Reply-To: <20110602230921.GA57825@icarus.home.lan> References: <20110602213116.425400b6.torfinn.ingolfsen@broadpark.no> <20110602195026.GA54023@icarus.home.lan> <20110603003940.d0b3821b.torfinn.ingolfsen@broadpark.no> <20110602230921.GA57825@icarus.home.lan>
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Update: On Thu, 02 Jun 2011 16:09:21 -0700 Jeremy Chadwick <freebsd@jdc.parodius.com> wrote: > Anyway, your system has 4GB of RAM installed in it, so on 8.1-STABLE I'd > recommend you try these settings: > > vm.kmem_size="3584M" > vm.kmem_size_max="3584M" > vfs.zfs.arc_max="2048M" > > Now, these are all chosen by me off the top of my head with absolutely > ZERO knowledge of what the memory usage on this system is like > **without** ZFS in the picture. I'm making a lot of assumptions, and > I'm assuming worst-case scenarios. For example, if this machine also > runs mysqld and its tuned to take up a lot of memory, I would advocate > dropping vfs.zfs.arc_max to 1536M or 1024M. Please don't drop it "too > much"; ZFS performs best when it has lots of ARC. > > Since you mentioned going to 8.2-STABLE, all you need to tune on that > version is one single tunable: > > vfs.zfs.arc_max The machine now runs 8.2-stable: root@kg-f2# uname -a FreeBSD kg-f2.kg4.no 8.2-STABLE FreeBSD 8.2-STABLE #5: Fri Jun 3 17:20:39 CEST 2011 root@kg-f2.kg4.no:/usr/obj/usr/src/sys/GENERIC amd64 And I have added the following to /boot/loader.conf: vfs.zfs.arc_max="2048M" Hopefully, this will keep the machine rock solid (unitil something else happens, at least). Oh, and thanks for your advice - really helpful. -- Torfinn
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