Date: Fri, 24 Sep 2010 16:04:03 +0300 From: Andriy Gapon <avg@icyb.net.ua> To: Jeremy Chadwick <freebsd@jdc.parodius.com>, Leroy van Logchem <leroy.vanlogchem@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: 8.1-RELEASE: [zfs] [kmem] zfs destroy snapshot results in panic: kmem_map too small Message-ID: <4C9CA1C3.5070608@icyb.net.ua> In-Reply-To: <20100924123331.GA62762@icarus.home.lan> References: <AANLkTi=JwYZmxrQxpwNkXyZxC%2BANbCXebTBpZj7c6x03@mail.gmail.com> <20100924123331.GA62762@icarus.home.lan>
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on 24/09/2010 15:33 Jeremy Chadwick said the following: > As for your questions under "Questions" -- yes you have to tune, no > there aren't really "reliable guidelines" and I've been asking for such > since ZFS came out for FreeBSD, but your values look fine. I can't provide you "reliable" or "authoritative" guidelines, but I have an advice which seems to work. On amd64 set your vm.kmem_size to at least the amount of available memory that you got, or even more (1.5x, 2x). An easy way to do that (1x) is to set vm.kmem_size_scale="1". In head this is already done automatically, MFC to stable/8 is expected. As to arc_max/arc_min, set them based your needs according to general ZFS recommendations. -- Andriy Gapon
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