Date: Wed, 05 Oct 2011 10:30:11 +1100 From: Aristedes Maniatis <ari@ish.com.au> To: Andriy Gapon <avg@FreeBSD.org> Cc: freebsd-fs@FreeBSD.org Subject: Re: vm.kmem_size_scale recommendation for ZFS Message-ID: <4E8B9703.4070303@ish.com.au> In-Reply-To: <4E8B08FA.1020900@FreeBSD.org> References: <4E8A8740.100@ish.com.au> <4E8B08FA.1020900@FreeBSD.org>
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On 5/10/11 12:24 AM, Andriy Gapon wrote: > on 04/10/2011 07:10 Aristedes Maniatis said the following: >> B. vm.kmem_size_scale=0.66 > > This parameter is integer. Ah, of course. Would it then be the recommendation that kmem be set manually to 150% of physical memory, or should it normally be left to its default in a machine with a medium amount of RAM (24Gb) and heavy usage of ZFS? I've googled but I just can't understand what the purpose would be of setting kmem to greater than physical memory. But if it helps... Ari -- --------------------------> Aristedes Maniatis ish http://www.ish.com.au Level 1, 30 Wilson Street Newtown 2042 Australia phone +61 2 9550 5001 fax +61 2 9550 4001 GPG fingerprint CBFB 84B4 738D 4E87 5E5C 5EFA EF6A 7D2E 3E49 102A
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