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Date:      Sat, 7 Apr 2007 21:15:17 +0200
From:      Pawel Jakub Dawidek <pjd@FreeBSD.org>
To:        ticso@cicely.de
Cc:        freebsd-fs@FreeBSD.org, freebsd-current@FreeBSD.org, "Florian C. Smeets" <flo@kasimir.com>
Subject:   Re: ZFS committed to the FreeBSD base.
Message-ID:  <20070407191517.GN63916@garage.freebsd.pl>
In-Reply-To: <20070407180319.GH8831@cicely12.cicely.de>
References:  <20070406025700.GB98545@garage.freebsd.pl> <20070407025644.GC8831@cicely12.cicely.de> <20070407131353.GE63916@garage.freebsd.pl> <4617A3A6.60804@kasimir.com> <20070407165759.GG8831@cicely12.cicely.de> <20070407180319.GH8831@cicely12.cicely.de>

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On Sat, Apr 07, 2007 at 08:03:19PM +0200, Bernd Walter wrote:
> Now with 240M kmem it looks good, but I'm still unshure:
> kstat.zfs.misc.arcstats.c_min: 67108864
> kstat.zfs.misc.arcstats.c_max: 188743680
> kstat.zfs.misc.arcstats.size: 87653376
> c_max seemed to be increasing with kmem, but I did compare it with a
> remebered value.
> Should be good with:
> vm.kmem_size: 251658240
> But top shows wired memory which is roughly twice the size of
> arcstats.size, so I'm still worried about kmem exhaustion if ARC runs
> up to c_max.
> Since the c_min/c_max values also influence the available RAM for other
> purposes as well, can we have it at least a loader.conf tuneable?

Just committed a change. You can tune max and min ARC size via
vfs.zfs.arc_max and vfs.zfs.arc_min tunnables.

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

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