Date: Thu, 15 Oct 2009 15:19:17 +0200 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-fs@freebsd.org Subject: ZFS threads? Message-ID: <hb77gc$es0$1@ger.gmane.org>
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A VM running 8.0-RC1 with ZFS has load average of 18 while doing rsync
to it.
I notice there are two sets of 8 ZFS kernel threads present on the
system, which look like might be the cause of the high load. Is there a
way to reduce the number of these worker threads?
0 root -16 0 0K 280K - 11:47 3.96%
{spa_zio_6}
0 root -16 0 0K 280K - 12:34 0.00%
{spa_zio_5}
0 root -16 0 0K 280K - 12:11 0.00%
{spa_zio_3}
0 root -16 0 0K 280K - 11:43 0.00%
{spa_zio_1}
0 root -16 0 0K 280K - 11:24 0.00%
{spa_zio_0}
0 root -16 0 0K 280K - 11:20 0.00%
{spa_zio_7}
0 root -16 0 0K 280K - 11:19 0.00%
{spa_zio_2}
0 root -16 0 0K 280K - 10:54 0.00%
{spa_zio_4}
4 root -8 - 0K 8K - 3:10 0.00% [g_down]
0 root -16 0 0K 280K - 2:49 0.00% {spa_zio}
12 root -40 - 0K 128K WAIT 1:31 0.00%
{swi2: cambio}
12 root -64 - 0K 128K WAIT 0:42 0.00%
{irq17: mpt0}
0 root -16 0 0K 280K - 0:38 0.00%
{spa_zio_7}
0 root -16 0 0K 280K - 0:38 0.00%
{spa_zio_3}
0 root -16 0 0K 280K - 0:38 0.00%
{spa_zio_6}
0 root -16 0 0K 280K - 0:38 0.00%
{spa_zio_1}
0 root -16 0 0K 280K - 0:38 0.00%
{spa_zio_5}
0 root -16 0 0K 280K - 0:38 0.00%
{spa_zio_0}
0 root -16 0 0K 280K - 0:38 0.00%
{spa_zio_2}
0 root -16 0 0K 280K - 0:38 0.00%
{spa_zio_4}
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