Re: [zfs-discuss] set zfs:zfs_vdev_max_pending

2010-01-12 Thread Richard Elling
On Jan 12, 2010, at 2:54 PM, Ed Spencer wrote: > We have a zpool made of 4 512g iscsi luns located on a network appliance. > We are seeing poor read performance from the zfs pool. > The release of solaris we are using is: > Solaris 10 10/09 s10s_u8wos_08a SPARC > > The server itself is a T2000 >

Re: [zfs-discuss] set zfs:zfs_vdev_max_pending

2010-01-12 Thread Robert Milkowski
On 12/01/2010 23:47, Bob Friesenhahn wrote: On Tue, 12 Jan 2010, Ed Spencer wrote: I was wondering how we can tell if the zfs_vdev_max_pending setting is impeding read performance of the zfs pool? (The pool consists of lots of small files). If 'iostat -x' shows that svc_t is quite high, the

Re: [zfs-discuss] set zfs:zfs_vdev_max_pending

2010-01-12 Thread Bob Friesenhahn
On Tue, 12 Jan 2010, Ed Spencer wrote: I was wondering how we can tell if the zfs_vdev_max_pending setting is impeding read performance of the zfs pool? (The pool consists of lots of small files). If 'iostat -x' shows that svc_t is quite high, then reducing zfs_vdev_max_pending might help.

[zfs-discuss] set zfs:zfs_vdev_max_pending

2010-01-12 Thread Ed Spencer
We have a zpool made of 4 512g iscsi luns located on a network appliance. We are seeing poor read performance from the zfs pool. The release of solaris we are using is: Solaris 10 10/09 s10s_u8wos_08a SPARC The server itself is a T2000 I was wondering how we can tell if the zfs_vdev_max_pending