Date: Thu, 13 Sep 2007 17:07:44 -0500 From: Craig Boston <cb@severious.net> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: current@freebsd.org Subject: Re: ZFS not caching right? Message-ID: <20070913220744.GB5814@nowhere> In-Reply-To: <20070910195833.GE1103@garage.freebsd.pl> References: <20070906184853.GB90021@roadrunner.spoerlein.net> <20070910195833.GE1103@garage.freebsd.pl>
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On Mon, Sep 10, 2007 at 09:58:33PM +0200, Pawel Jakub Dawidek wrote: > Can you try recent HEAD? I committed a change that allows ZFS cache > (ARC) to use more memory. This should be safe after dfr@'s vnode leak > fix and should also help performance. FYI, I've started getting kmem_map too small panics again after this change, on i386. 2GB physical RAM vm.kmem_size: 671088640 (set in loader.conf) kern.maxvnodes: 75000 (down from the autotuned value of 100000) vfs.zfs.arc_min: 20971520 vfs.zfs.arc_max: 503316480 vfs.zfs.vdev.cache.size: 10485760 vfs.zfs.vdev.cache.max: 16384 Current values from a live system: kstat.zfs.misc.arcstats.c_min: 20971520 kstat.zfs.misc.arcstats.c_max: 503316480 kstat.zfs.misc.arcstats.size: 321891840 The panic showed "kmem_malloc(1568768): kmem_map too small: 458543104 total allocated" last time it happened. 640MB for kmem is pretty close to the max I can bump it up to before the system no longer boots for whatever reason. Let me know if I'm missing any relevant stats... Craig
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