Date: Tue, 6 Mar 2018 12:10:54 -0600 From: "Matthew D. Fuller" <fullermd@over-yonder.net> To: freebsd-current@FreeBSD.org Subject: Re: Strange ARC/Swap/CPU on yesterday's -CURRENT Message-ID: <20180306181054.GA42539@over-yonder.net> In-Reply-To: <20180305203918.jydrv7oelnh7sxp2@ler-imac.lerctr.org> References: <20180305203918.jydrv7oelnh7sxp2@ler-imac.lerctr.org>
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On Mon, Mar 05, 2018 at 02:39:18PM -0600 I heard the voice of Larry Rosenman, and lo! it spake thus: > > Yesterday, and I'm seeing really strange slowness, ARC use, and SWAP > use and swapping. > > Ideas? Since I updated to the Feb 25 -CURRENT I'm currently running (from mid-Sept, I believe), I see similar. It seems like the ARC has gotten really unwilling to yield, so it grows up in size, and then doesn't let up under pressure. I saw programs being actively used constantly swapping their working set in and out, since they were left with tiny available memory. Hard-slappping vfs.zfs.arc_max down a ways mitigated it enough to get me through the days, but is a pretty gross hackaround... -- Matthew Fuller (MF4839) | fullermd@over-yonder.net Systems/Network Administrator | http://www.over-yonder.net/~fullermd/ On the Internet, nobody can hear you scream.
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