I've tried putting this in /etc/system and rebooting
set zfs:zfs_vdev_max_pending = 16
Are we sure that number equates to a scsi command?
Perhaps I should set it to 8 and see what happens.
(I have 256 scsi commands I can queue across 16 drives)
I still got these error messages in the log.
Jan 15 15:29:40 yoda arcmsr: [ID 659062 kern.notice] arcmsr0: too many
outstanding commands (257 > 256)
Jan 15 15:29:40 yoda arcmsr: [ID 659062 kern.notice] arcmsr0: too many
outstanding commands (256 > 256)
Jan 15 15:29:43 yoda last message repeated 73 times
I watched iostat -x a good bit and usually it is 0.0 or 0.1
r...@yoda:~# iostat -x
extended device statistics
device r/s w/s kr/s kw/s wait actv svc_t %w %b
sd0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd1 0.4 2.0 22.3 13.5 0.1 0.0 39.3 1 2
sd2 0.5 2.0 25.6 13.5 0.1 0.0 40.4 2 2
sd3 0.3 21.5 18.7 334.4 0.7 0.1 40.1 13 15
sd4 0.3 21.6 18.9 334.4 0.7 0.1 40.6 13 15
sd5 0.3 21.5 19.2 334.4 0.7 0.1 39.7 12 15
sd6 0.3 21.6 18.6 334.4 0.7 0.2 40.4 13 15
sd7 0.3 21.6 18.7 334.4 0.7 0.1 40.3 12 15
sd8 0.3 21.6 18.7 334.4 0.7 0.2 40.1 13 15
sd9 0.3 21.5 18.5 334.5 0.7 0.1 40.0 12 14
sd10 0.3 21.4 18.9 333.6 0.7 0.1 40.2 12 14
sd11 0.3 21.4 18.9 333.6 0.7 0.1 39.3 12 15
sd12 0.3 21.4 19.4 333.6 0.7 0.2 40.0 13 15
sd13 0.3 21.4 18.9 333.6 0.7 0.1 40.3 13 15
sd14 0.3 21.4 19.0 333.6 0.7 0.1 38.8 12 14
sd15 0.3 21.4 19.1 333.6 0.7 0.1 39.6 12 14
sd16 0.3 21.4 18.7 333.6 0.7 0.1 39.3 12 14
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