Date: Fri, 22 Jan 2016 08:06:57 +0800 From: Jov <zhao6014@gmail.com> To: Mason Loring Bliss <mason@blisses.org> Cc: dweimer <dweimer@dweimer.net>, freebsd-questions@freebsd.org Subject: Re: ZFS performance help sought Message-ID: <CADyrUxNEYh8bUSvQHKp%2B95yfh8NU2UWRYVU0xzdqWJyxV_vbNw@mail.gmail.com> In-Reply-To: <20160121235545.GK4538@blisses.org> References: <20160121205139.GG4538@blisses.org> <ea3f05f9a8c20bd62a1c391b432dafe2@dweimer.net> <20160121232810.GJ4538@blisses.org> <20160121235545.GK4538@blisses.org>
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sys% 62.6 is wired=EF=BC=8Cwhat ie your disk type=EF=BC=9Fplease post the o= utput of iostat -x 1 2016=E5=B9=B41=E6=9C=8822=E6=97=A5 7:56 AM=EF=BC=8C"Mason Loring Bliss" <ma= son@blisses.org>=E5=86=99=E9=81=93=EF=BC=9A > On Thu, Jan 21, 2016 at 06:28:10PM -0500, Mason Loring Bliss wrote: > > > All that said, I wasn't setting write_limit_override, so I'm trying > that, and > > I'm cutting the txg.timeout back a couple seconds more. > > Well, that didn't help. System's still really choppy. > > last pid: 1707; load averages: 9.20, 4.75, 2.14 up 0+00:09:35 > 18:53:03 > 55 processes: 1 running, 54 sleeping > CPU: 2.1% user, 0.0% nice, 62.6% system, 0.5% interrupt, 34.8% idle > Mem: 323M Active, 331M Inact, 4589M Wired, 8928K Cache, 2677M Free > ARC: 4096M Total, 916M MFU, 2303M MRU, 845M Anon, 17M Header, 15M Other > Swap: 8192M Total, 8192M Free > > PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU > COMMAND > 1501 root 1 33 0 42248K 3616K dmu_tx 1 0:10 5.76% zfs > 1500 root 1 24 0 42248K 3768K pipewr 0 0:08 5.18% zfs > > Here's what I set: > > vfs.zfs.arc_max=3D"4096M" > vfs.zfs.arc_min=3D"1024M" > vfs.zfs.txg.timeout=3D"3" > vfs.zfs.write_limit_override=3D"512M" > > I'm not seeing any obvious way to verify the write_limit_override setting= - > it appears not to show up in sysctl output. > > I'll wait for the current big transfer to finish and then I'll try it wit= h > prefetch disabled too. > > -- > Mason Loring Bliss mason@blisses.org Ewige Blumenkraft! > awake ? sleep : random() & 2 ? dream : sleep; -- Hamlet, Act III, Scene I > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org" >
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