Date: Sun, 8 Aug 2010 13:57:09 +0800 From: "Alex V. Petrov" <alexvpetrov@gmail.com> To: freebsd-stable@freebsd.org Subject: Re: zpool - low speed write Message-ID: <201008081357.09659.alexvpetrov@gmail.com> In-Reply-To: <4C5E2EE9.6020008@ukr.net> References: <201008042008.25679.alexvpetrov@gmail.com> <201008081108.00175.alexvpetrov@gmail.com> <4C5E2EE9.6020008@ukr.net>
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=D0=92 =D1=81=D0=BE=D0=BE=D0=B1=D1=89=D0=B5=D0=BD=D0=B8=D0=B8 =D0=BE=D1=82 =
8 =D0=B0=D0=B2=D0=B3=D1=83=D1=81=D1=82=D0=B0 2010 12:13:29 =D0=B0=D0=B2=D1=
=82=D0=BE=D1=80 Vladislav V. Prodan =D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=
=BB:
> 08.08.2010 6:07, Alex V. Petrov wrote:
> > sysctl -a | grep vm.kmem
> > vm.kmem_size_max: 329853485875
> >=20
> > sysctl -a | grep vfs.zfs.arc
> > vfs.zfs.arc_meta_used: 13797096
> > vfs.zfs.arc_max: 858721280
> >=20
> >=20
> > sysctl -a | grep vm.kvm
> > vm.kvm_free: 547673337856
> > vm.kvm_size: 549755809792
>=20
> Please, insert into /boot/loader.conf only this options:
>=20
> vm.kmem_size=3D"999M"
> vm.kmem_size_max=3D"999M"
> vfs.zfs.arc_max=3D"160M"
>=20
> And after reboot, please run dd...
I think these settings are relevant only for i386, but not for amd64
dd if=3D/dev/zero of=3D/tank/test.zero bs=3D3M count=3D1000
1000+0 records in
1000+0 records out
3145728000 bytes transferred in 425.627495 secs (7390801 bytes/sec)
zpool iostat -v 10 10
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 759G 1,98T 0 43 31,7K 4,37M
ad12 230G 701G 0 15 10,8K 1,55M
ad8 244G 684G 0 15 11,6K 1,55M
ad10 286G 642G 0 13 9,33K 1,27M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 759G 1,98T 0 80 0 3,26M
ad12 230G 701G 0 27 0 1,24M
ad8 244G 684G 0 27 0 1,08M
ad10 286G 642G 0 25 0 962K
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 759G 1,98T 0 100 6,39K 3,31M
ad12 230G 701G 0 34 0 1,23M
ad8 244G 684G 0 33 0 1,13M
ad10 286G 642G 0 33 6,39K 970K
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 760G 1,98T 0 132 0 7,21M
ad12 230G 701G 0 41 0 2,23M
ad8 244G 684G 0 47 0 2,79M
ad10 286G 642G 0 43 0 2,20M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 760G 1,98T 0 110 6,39K 5,19M
ad12 230G 701G 0 39 0 2,12M
ad8 244G 684G 0 36 6,39K 1,67M
ad10 286G 642G 0 33 0 1,40M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 760G 1,98T 0 100 6,39K 4,81M
ad12 230G 701G 0 33 0 1,79M
ad8 244G 684G 0 34 0 1,65M
ad10 286G 642G 0 32 6,39K 1,37M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 760G 1,98T 0 117 0 6,21M
ad12 230G 701G 0 41 0 2,23M
ad8 244G 684G 0 39 0 2,14M
ad10 286G 642G 0 37 0 1,84M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 760G 1,98T 0 113 0 5,87M
ad12 230G 701G 0 36 0 1,77M
ad8 244G 684G 0 40 0 2,19M
ad10 286G 642G 0 37 0 1,90M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 760G 1,98T 0 102 12,8K 5,19M
ad12 230G 701G 0 37 6,39K 2,02M
ad8 244G 684G 0 34 0 1,84M
ad10 286G 642G 0 30 6,39K 1,32M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 760G 1,98T 0 124 0 6,32M
ad12 230G 701G 0 43 0 2,31M
ad8 244G 684G 0 41 0 2,16M
ad10 286G 642G 0 39 0 1,85M
=2D--------- ----- ----- ----- ----- ----- -----
=2D----
Alex V. Petrov
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