Date: Tue, 6 Mar 2018 13:36:45 -0600 From: Larry Rosenman <ler@lerctr.org> To: "Rodney W. Grimes" <freebsd-rwg@pdx.rh.CN85.dnsmgr.net> 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: <20180306193645.vv3ogqrhauivf2tr@ler-imac.lerctr.org> In-Reply-To: <201803061816.w26IGaW5050053@pdx.rh.CN85.dnsmgr.net> References: <20180306173455.oacyqlbib4sbafqd@ler-imac.lerctr.org> <201803061816.w26IGaW5050053@pdx.rh.CN85.dnsmgr.net>
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--hmgbyx5apge22vah Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Mar 06, 2018 at 10:16:36AM -0800, Rodney W. Grimes wrote: > > 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: > > > >=20 > > > > > Upgraded to: > > > > >=20 > > > > > FreeBSD borg.lerctr.org 12.0-CURRENT FreeBSD 12.0-CURRENT #11 r33= 0385: Sun Mar 4 12:48:52 CST 2018 root@borg.lerctr.org:/usr/obj/usr/sr= c/amd64.amd64/sys/VT-LER amd64 > > > > > +1200060 1200060 > > > > >=20 > > > > > Yesterday, and I'm seeing really strange slowness, ARC use, and S= WAP use and swapping. > > > > >=20 > > > > > See http://www.lerctr.org/~ler/FreeBSD/Swapuse.png > > > >=20 > > > > I see these symptoms on stable/11. One of my servers has 32 GiB of= =20 > > > > RAM. After a reboot all is well. ARC starts to fill up, and I still= =20 > > > > have more than half of the memory available for user processes. > > > >=20 > > > > After running the periodic jobs at night, the amount of wired memor= y=20 > > > > goes sky high. /etc/periodic/weekly/310.locate is a particular nast= y=20 > > > > one. > > >=20 > > > 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. > > >=20 > > > Have you been in contact with Michael Dexter about this > > > issue, or any other forum/mailing list/etc? =20 > > Just IRC/Slack, with no response. > > >=20 > > > 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 back= up is slow. >=20 > One place to look is to see if this is the recently fixed: > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D222288 > g_bio leak. >=20 > vmstat -z | egrep 'ITEM|g_bio|UMA' >=20 > would be a good first look >=20 borg.lerctr.org /home/ler $ vmstat -z | egrep 'ITEM|g_bio|UMA' ITEM SIZE LIMIT USED FREE REQ FAIL SLEEP UMA Kegs: 280, 0, 346, 5, 560, 0, 0 UMA Zones: 1928, 0, 363, 1, 577, 0, 0 UMA Slabs: 112, 0,25384098, 977762,102033225, 0, 0 UMA Hash: 256, 0, 59, 16, 105, 0, 0 g_bio: 384, 0, 33, 1627,542482056, 0, 0 borg.lerctr.org /home/ler $ > > > > Limiting the ARC to, say, 16 GiB, has no effect of the high amount = of=20 > > > > wired memory. After a few more days, the kernel consumes virtually = all=20 > > > > memory, forcing processes in and out of the swap device. > > >=20 > > > Our experience as well. > > >=20 > > > ... > > >=20 > > > Thanks, > > > Rod Grimes rgrimes@fr= eebsd.org > > Larry Rosenman http://www.lerctr.org/~ler >=20 > --=20 > Rod Grimes rgrimes@freebs= d.org --=20 Larry Rosenman http://www.lerctr.org/~ler Phone: +1 214-642-9640 E-Mail: ler@lerctr.org US Mail: 5708 Sabbia Drive, Round Rock, TX 78665-2106 --hmgbyx5apge22vah Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQHABAABCgCqFiEEHjgknedhWzvJgwVzaXyZsatIp30FAlqe7c0sFIAAAAAAFQAO cGthLWFkZHJlc3NAZ251cGcub3JnbGVyQGxlcmN0ci5vcmdfFIAAAAAALgAoaXNz dWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDFFMzgy NDlERTc2MTVCM0JDOTgzMDU3MzY5N0M5OUIxQUI0OEE3N0QACgkQaXyZsatIp31n zQf/RI8snUq43fJnLWWTIgdfkPpBVYUMD8sRDzZBYZN96U13bOM8fZOxl/Sy0h1B WoHZzXGnpptr6kWfEimkmWYQEiVFTX6xLOaeK7XdpCKe8GGcLPaLL6/TIEIE6x8g K1j4NcJ1AQzXQJG3kRgGHb2fgTWOjpxRUx/Sh4myDDnYEuY9ZEZdE/3kgR0+b7tP rVW/mk/GZQBWVzqdecRmTCYyhMAdPlhvm2mm0KHDoHLDFDS0sL2QWZ78glIdKFue dFaIFKsdOaAfHqfuj4FCp8CpNNALhmFNeyIRBs523MWV52qu+aZPcu9aczByV159 4WkHPr3QKwK1Z0XFyqZXGl0ovg== =7Kl9 -----END PGP SIGNATURE----- --hmgbyx5apge22vah--
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