Date: Tue, 6 Mar 2018 19:15:54 -0300 From: "Danilo G. Baio" <dbaio@FreeBSD.org> To: "Rodney W. Grimes" <freebsd-rwg@pdx.rh.CN85.dnsmgr.net>, Trond Endrest?l <Trond.Endrestol@fagskolen.gjovik.no>, FreeBSD current <freebsd-current@freebsd.org> Cc: Kurt Jaeger <lists@opsec.eu> Subject: Re: Strange ARC/Swap/CPU on yesterday's -CURRENT Message-ID: <20180306221554.uyshbzbboai62rdf@dx240.localdomain> In-Reply-To: <20180306193645.vv3ogqrhauivf2tr@ler-imac.lerctr.org> References: <20180306173455.oacyqlbib4sbafqd@ler-imac.lerctr.org> <201803061816.w26IGaW5050053@pdx.rh.CN85.dnsmgr.net> <20180306193645.vv3ogqrhauivf2tr@ler-imac.lerctr.org>
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--dcm2io5y6advqnhh Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Mar 06, 2018 at 01:36:45PM -0600, Larry Rosenman wrote: > 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 r= 330385: Sun Mar 4 12:48:52 CST 2018 root@borg.lerctr.org:/usr/obj/usr/= src/amd64.amd64/sys/VT-LER amd64 > > > > > > +1200060 1200060 > > > > > >=20 > > > > > > Yesterday, and I'm seeing really strange slowness, ARC use, and= SWAP 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 o= f=20 > > > > > RAM. After a reboot all is well. ARC starts to fill up, and I sti= ll=20 > > > > > have more than half of the memory available for user processes. > > > > >=20 > > > > > After running the periodic jobs at night, the amount of wired mem= ory=20 > > > > > goes sky high. /etc/periodic/weekly/310.locate is a particular na= sty=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 ba= ckup 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 amoun= t of=20 > > > > > wired memory. After a few more days, the kernel consumes virtuall= y all=20 > > > > > memory, forcing processes in and out of the swap device. > > > >=20 > > > > Our experience as well. > > > >=20 > > > > ... > > > >=20 > > > > Thanks, > > > > Rod Grimes rgrimes@= freebsd.org > > > Larry Rosenman http://www.lerctr.org/~ler > >=20 > > --=20 > > Rod Grimes rgrimes@free= bsd.org >=20 > --=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 Hi. I noticed this behavior as well and changed vfs.zfs.arc_max for a smaller s= ize. For me it started when I upgraded to 1200058, in this box I'm only using poudriere for building tests. Regards. --=20 Danilo G. Baio (dbaio) --dcm2io5y6advqnhh Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEORj0UTsjzCy+enIkmpN7LfMuiNcFAlqfExUACgkQmpN7LfMu iNd3zg/9G2ndeASQMdADH5pALt3Vmbr9oRWYr8TN33AJt8GPAviwz++sn44dDZ5y c7fQdZoIkt2I3ERiOFDO0oHPp3FADS9iepb4sgvHx3LBAwCriy/+UqDAqPt2JM+t IyYHTTsnYHuvZjiDSn9DAhemU3vtfLJgDHdKwMbAyk0P647cAFbUXeaCRKjC0aH+ wvFpCYF9Vi5qj5j0Agg6cjS+FLZM6vPgq9bTiWhtm4PsRH1sjeh43F4mBQWvcbzv mw6IRP746T+kofgphc2VhzHmdHtJh+30Y25GjdYf8GKLDH7z4lrGADCCuoiJFIim X9Z772/5glcolmCtt10yGsyw60rjlyYjBBf8gp11rRIsNPt6fWpAsk1OvSgd4M/g 4wTHkgkGTXoOkoCVC6CDbI3Ionn+PGvOvt8tvADiZvgwe7/cGZuYiSfzhMVZM6K5 u/uEXmo23NR1jPC+9TmEkGcCe22duXu07gM1qpfGRlCcrzJzUL+9hZpmA+kHltJy wcCsTn+8EqMXbwaewbWpKVTN2IgY9Ho+RFyz8fXA9aUuuJDx4VkS1pJZtgtPVF6T +upCIURi7/J6x00UW4pjWrF4PR9BO7hm1ySGdt4T3DJ8GkcxyBJXii27EMRyKyPs C/BH1Ok82RD5kleTcQ7Kju2KiSIHiuY+y5ksrm1tSBCSnPTIvg8= =lX5M -----END PGP SIGNATURE----- --dcm2io5y6advqnhh--
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