Date: Thu, 4 Feb 2016 06:03:23 +1100 From: Peter Jeremy <peter@rulingia.com> To: Shane Ambler <FreeBSD@ShaneWare.Biz> Cc: stable@FreeBSD.org Subject: Re: 10-STABLE hangups frequently Message-ID: <20160203190323.GC78969@server.rulingia.com> In-Reply-To: <56B1B1E9.2090707@ShaneWare.Biz> References: <ygeegcvpmv1.wl-ume@mahoroba.org> <20160202183913.GG8270@graf.pompo.net> <56B1B1E9.2090707@ShaneWare.Biz>
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--tsOsTdHNUZQcU9Ye Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2016-Feb-03 18:23:13 +1030, Shane Ambler <FreeBSD@ShaneWare.Biz> wrote: >Any chance you get high wired allocations? A high wired allocation is normal for ZFS - ARC shows up as "wired" memory. >Sometimes several times in a day I see the wired amount shown in top >rise to over 6GB (of 8GB) bringing the system to a crawl. When wired >gets over 7GB the system rarely recovers. The ARC limit defaults to 1GB less than physical RAM so 6GB wired on an 8GB system isn't unexpected (my home system currently has 30GB wired out of 32GB). If this is causing problems for your workload, it sounds like you may need to explicitly reduce vfs.zfs.arc_max (note that this is a soft limit). You might like to install sysutils/zfs-stats and do some ZFS tunung. --=20 Peter Jeremy --tsOsTdHNUZQcU9Ye Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQJ8BAEBCgBmBQJWsk77XxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRFRUIyOTg2QzMwNjcxRTc0RTY1QzIyN0Ux NkE1OTdBMEU0QTIwQjM0AAoJEBall6Dkogs0NEcP/Avhw4QEDAYmKkg04RndIlGH mpms0ZF9wl7i82vzrtKK+JrpTEzzkzLBYRqLiDV34nkPa0A4Md766JWpe80GCT29 asQmn9XyrM30c6EP0sEgP44xekyH8gZrFSZ6oP9cS3kgyh76S2hkHW5KWvB+6Yl5 kqIVvIx2CajWAbXAlx9FdtzfvnxoxfwIG+dMyhxpj9raAMmWc2EGPS0QcfAy6COs k/rMvcKMQk09TLVDJ5DpOVdnB6yYslnfEfNzUwPGeERlkd36kOken5j3PRxlUVCK s0rMcdcTPMtsFbeHMXSENUnTsEjLS/r33qd6sXwctGCHckBadmB7NZg74v8UMjxT VaWuDAohKNogkctZ94t/uan4CpGvhFjwFLObmdpmTwnzYBYjhqetYYHBZRVS3rAw F2i3Ms5fdd3lRnAOhpWQZ6YHLCh6kee3eIhoz35CY0Wl6U9VqsKWQiu04nIUbFbv InXvAgz+r5llSaYfMN4w7eCeMecfpURAwWXGuG2WahQ5rrj0Zatbc29qYYclIjcS LPr0D84w3sKq+m71tJD+HfJIeHC0Fqj7LtJ+GuTR2tEKcEKpphxTnlteZCq5xLnE pYff8DGOKGyXMUPFHM50i6daNMQSRyfGtxLq7RgqUzGbUwEcGhQuYV6z4+YTys3G ElC0/ChpI+eTagnqCJ0X =SjVW -----END PGP SIGNATURE----- --tsOsTdHNUZQcU9Ye--
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