Date: Fri, 28 Feb 2014 16:11:08 +0200 From: Volodymyr Kostyrko <c.kworr@gmail.com> To: Matthias Gamsjager <mgamsjager@gmail.com> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS and Wired memory, again Message-ID: <531098FC.6090806@gmail.com> In-Reply-To: <CA%2BD9QhtVkYNoEGwhx-EJi9X1jr_UN2rgYxbZtA99qcT4UA-8kA@mail.gmail.com> References: <CAFG2KC%2BZSHEVFbpPD9e1QHRdY=Sd6EuAD80vyDLDDQcpgCQNhA@mail.gmail.com> <530F6475.4090508@gmail.com> <CA%2BD9QhtVkYNoEGwhx-EJi9X1jr_UN2rgYxbZtA99qcT4UA-8kA@mail.gmail.com>
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28.02.2014 13:47, Matthias Gamsjager wrote: > > > +1 from me, FreeBSD 10, uma=0 > > 52 processes: 2 running, 49 sleeping, 1 zombie > CPU: 0.0% user, 0.0% nice, 0.0% system, 0.4% interrupt, 99.6% idle > Mem: 31M Active, 16K Inact, 3352M Wired, 17M Cache, 48M Free > ARC: 1838M Total, 110M MFU, 18M MRU, 548K Anon, 1876M Header, 75M Other > Swap: 4096M Total, 126M Used, 3969M Free, 3% Inuse > > Machine is plain dead. Running database or squid or anything causes > excessive swapping. This is the state when I disabled all payload, > with everything started swap goes to 500M and machine is burning disks. > > > I wonder do you use any zfs tuning? Like max arc size? Wonder if setting > that to a reasonable amount would help. The previous sample was taken without any tunables. After that I enabled vfs.zfs.zio.use_uma in /boot/loader.conf and now everything looks like: 103 processes: 1 running, 101 sleeping, 1 zombie CPU: 0.0% user, 0.0% nice, 1.2% system, 2.0% interrupt, 96.9% idle Mem: 137M Active, 13M Inact, 3176M Wired, 14M Cache, 111M Free ARC: 2026M Total, 781M MFU, 72M MRU, 414K Anon, 1221M Header, 98M Other Swap: 4096M Total, 263M Used, 3833M Free, 6% Inuse Currently wired memory grows and pushes inactive to swap. Sometimes wired memory retracts freeing 100MB or so. Machine is in working state currently. The major changes are: * less wired; * more arc; * a lot of header memory but less then before, I wonder whether it only grows or retracts... I'm also thinking about trying a patch to l2arc as this system uses external l2 cache. -- Sphinx of black quartz, judge my vow.
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