Date: Tue, 12 Jan 2010 15:35:12 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-stable@freebsd.org Subject: Re: Please explain FreeBSD 8.0/ZFS memory usage patterns Message-ID: <hii1av$k55$1@ger.gmane.org> In-Reply-To: <201001121050.04982.mail@maxlor.com> References: <201001121050.04982.mail@maxlor.com>
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Benjamin Lutz wrote: > Hello, > > I've set up a FreeBSD-8.0/amd64 system with ZFS as a home server, and I'm a > bit puzzled by it's memory usage pattern; I'm seeing total memory usage > oscillate between roughly 50% and 90% of my RAM. So I've tracked memory > usage over the course of about 12 hours and graphed it here: > > http://www.maxlor.com/temp/mem.png 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? > 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).
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