Sorry for the delay in getting back to this. On 04/21/2014 08:07 AM, Micky wrote: > But this is now interesting. I am seeing a behavior of slow slow I/O > from KVM guest on idle GZ. > Kstat zfs_vfs looks like this. > > I assume it shows no latency but what does those delay_cnt and delay_time > mean? > > > module: zone_vfs instance: 2 > name: 359c4843-024e-4bab-8e9b-4330db class: zone_vfs > 100ms_ops 0 > 10ms_ops 1 > 10s_ops 0 > 1s_ops 0 > crtime 5758.489956494 > delay_cnt 63810 > delay_time 3043170 > nread 605726 > nwritten 5566 > reads 66 > rlentime 299610 > rtime 162938 > snaptime 13104.730586639 > wlentime 27242641 > writes 2527 > wtime 27242641 > zonename 359c4843-024e-4bab-8e9b-4330dbbd3abf
delay_cnt is the number of times that the ZFS I/O throttle has throttled since the instances was started via vmadm. The delay_time is the total amount of time in microseconds that the zone has been throttled since it was started via vmadm. It will be cleared whenever the zone resets, which does not happen when reboot is typed inside of a kvm guest. Robert ------------------------------------------- smartos-discuss Archives: https://www.listbox.com/member/archive/184463/=now RSS Feed: https://www.listbox.com/member/archive/rss/184463/25769125-55cfbc00 Modify Your Subscription: https://www.listbox.com/member/?member_id=25769125&id_secret=25769125-7688e9fb Powered by Listbox: http://www.listbox.com
