[OmniOS-discuss] performance extrremely low from nothing !

[Dirk-Jan Wemmers]

Hi Fabio,

is your pool (or one of your individual vdev’s) almost full? ZFS performance can take quite a nosedive when it fills up above say 80%.

Regards,
Dirk-Jan

> On 24 May 2016, at 18:41, Fábio Rabelo <fabio at fabiorabelo.wiki.br> wrote:
> 
> Competely lost here ...
> 
> Found what command replaced the "zfs_vdev_max_pending" , and it make
> no difference !
> 
> First, I added this command to /etc/system :
> 
> set zfs:zfs_vdev_max_active = 1
> 
> make no diference, then added all this parameters :
> 
> set zfs:zfs_vdev_async_read_max_active  = 3
> set zfs:zfs_vdev_async_read_min_active  = 1
> set zfs:zfs_vdev_async_write_max_active  = 11
> set zfs:zfs_vdev_async_write_min_active  = 1
> set zfs:zfs_vdev_max_active = 1
> set zfs:zfs_vdev_scrub_max_active = 2
> set zfs:zfs_vdev_scrub_min_active = 1
> set zfs:zfs_vdev_sync_read_max_active  = 10
> set zfs:zfs_vdev_sync_read_min_active  = 10
> set zfs:zfs_vdev_sync_write_max_active = 1
> set zfs:zfs_vdev_sync_write_min_active = 1
> set zfs:zfs_vdev_async_write_active_max_dirty_percent = 60
> set zfs:zfs_vdev_async_write_active_min_dirty_percent = 30
> 
> no diference either ...
> 
> Yes. I rebooted the machine for the first and the second try .
> 
> Someone has any clue ?
> 
> 
> Fábio Rabelo
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