Date: Tue, 12 Jan 2010 21:27:39 +0100 From: Benjamin Lutz <mail@maxlor.com> To: freebsd-stable@freebsd.org Subject: Re: Please explain FreeBSD 8.0/ZFS memory usage patterns Message-ID: <201001122127.39886.mail@maxlor.com> In-Reply-To: <hii1av$k55$1@ger.gmane.org> References: <201001121050.04982.mail@maxlor.com> <hii1av$k55$1@ger.gmane.org>
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On Tuesday 12 January 2010 15:35:12 Ivan Voras wrote: > How do you get those categories: kern, proc? I suppose proc could be sum > of resident sizes of processes (aka "RES" in top) and kern could be > sysctl vm.kmem_size? yes, exactly. kern is kvm.kmem_size, proc is the sum of RSS memory of all processes (including kernel processes), active and wired are the value from top, arc is the ZFS ARC. > > In the first half of the graph, there's a torrent download running, which > > I assume causes the large fluctuations in memory usage. However, memory > > usage > > Large fluctuations in which category? The ARC? (since "proc" doesn't > fluctuate much). well, wired seems to move with the ARC. But why does active memory move so much? As you pointed out, my processes don't change that much. Cheers Benjamin
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