Date: Tue, 6 Mar 2018 10:16:36 -0800 (PST) From: "Rodney W. Grimes" <freebsd-rwg@pdx.rh.CN85.dnsmgr.net> To: Larry Rosenman <ler@lerctr.org> Cc: "Trond Endrest?l" <Trond.Endrestol@fagskolen.gjovik.no>, FreeBSD current <freebsd-current@freebsd.org> Subject: Re: Strange ARC/Swap/CPU on yesterday's -CURRENT Message-ID: <201803061816.w26IGaW5050053@pdx.rh.CN85.dnsmgr.net> In-Reply-To: <20180306173455.oacyqlbib4sbafqd@ler-imac.lerctr.org>
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> On Tue, Mar 06, 2018 at 08:40:10AM -0800, Rodney W. Grimes wrote: > > > On Mon, 5 Mar 2018 14:39-0600, Larry Rosenman wrote: > > > > > > > Upgraded to: > > > > > > > > FreeBSD borg.lerctr.org 12.0-CURRENT FreeBSD 12.0-CURRENT #11 r330385: Sun Mar 4 12:48:52 CST 2018 root@borg.lerctr.org:/usr/obj/usr/src/amd64.amd64/sys/VT-LER amd64 > > > > +1200060 1200060 > > > > > > > > Yesterday, and I'm seeing really strange slowness, ARC use, and SWAP use and swapping. > > > > > > > > See http://www.lerctr.org/~ler/FreeBSD/Swapuse.png > > > > > > I see these symptoms on stable/11. One of my servers has 32 GiB of > > > RAM. After a reboot all is well. ARC starts to fill up, and I still > > > have more than half of the memory available for user processes. > > > > > > After running the periodic jobs at night, the amount of wired memory > > > goes sky high. /etc/periodic/weekly/310.locate is a particular nasty > > > one. > > > > I would like to find out if this is the same person I have > > reporting this problem from another source, or if this is > > a confirmation of a bug I was helping someone else with. > > > > Have you been in contact with Michael Dexter about this > > issue, or any other forum/mailing list/etc? > Just IRC/Slack, with no response. > > > > If not then we have at least 2 reports of this unbound > > wired memory growth, if so hopefully someone here can > > take you further in the debug than we have been able > > to get. > What can I provide? The system is still in this state as the full backup is slow. One place to look is to see if this is the recently fixed: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222288 g_bio leak. vmstat -z | egrep 'ITEM|g_bio|UMA' would be a good first look > > > Limiting the ARC to, say, 16 GiB, has no effect of the high amount of > > > wired memory. After a few more days, the kernel consumes virtually all > > > memory, forcing processes in and out of the swap device. > > > > Our experience as well. > > > > ... > > > > Thanks, > > Rod Grimes rgrimes@freebsd.org > Larry Rosenman http://www.lerctr.org/~ler -- Rod Grimes rgrimes@freebsd.org
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