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Date: Fri, 21 Jan 2011 16:04:13 +0100
From: Pawel Jakub Dawidek <pjd@FreeBSD.org>
To: jackie wang <jackieit@gmail.com>
Message-ID: <20110121150413.GE1698@garage.freebsd.pl>
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Cc: freebsd-fs@freebsd.org
Subject: Re: Freebsd8.1 ZFS with mfi driver performance
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On Thu, Jan 20, 2011 at 09:57:33PM +0800, jackie wang wrote:
> more /boot/loader.conf
>=20
> VS001# more /boot/loader.conf
> zfs_load=3D"YES"
> vfs.root.mountfrom=3D"zfs:zroot"
> geom_mirror_load=3D"YES"
> #vm.kmem_size=3D"4096M"
> #vm.kmem_size_max=3D"3072M"

Why you commented those out? Try adding:

vm.kmem_size=3D"4096M"

> vfs.zfs.arc_min=3D"1024M"
> vfs.zfs.arc_max=3D"4096M"
> #vfs.zfs.vdev.cache.size=3D"5M"
> vfs.zfs.vdev.min_pending=3D"1"
> vfs.zfs.vdev.max_pending=3D"1"
> vfs.zfs.prefetch_disable=3D"1"
> vfs.zfs.txg.timeout=3D"5"
> vfs.zfs.txg.synctime=3D"1"
> vfs.zfs.txg.write_limit_override=3D"524288000"
>=20
> when the system slow there much mermory in wired status about 5GB, and
> the system begin to use swap.
>=20
> So,my question is why the zfs slow . Please Help ,now the box is in
> production env.

Could you explain all your settings there? I'd start from removing all
of them and just leaving kmem_size.

--=20
Pawel Jakub Dawidek                       http://www.wheelsystems.com
pjd@FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!

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