Re: [perf-discuss] zfs write slow

2010-02-01 Thread Anatoly
Thank you very much! I will try to lower IO queue, disable arc cache, and disable cache flushing and post back results. Logbias property sounds interesting. It's sad that it's not implemended in solaris yet. -- This message posted from opensolaris.org

Re: [perf-discuss] Nice graphs of filebench data

2010-02-01 Thread Henrik Johansson
On Jan 31, 2010, at 6:35 PM, Dominic Kay wrote: > I used Openoffice spreadsheet graphs rather than the graphics package that > came with filebench at the time (I cannot remember which that was: gplot > maybe) because with _some_ filesystems it is hard to generate deterministic > results from on

Re: [perf-discuss] zfs write slow

2010-02-01 Thread Richard Elling
On Jan 31, 2010, at 9:39 PM, Anatoly wrote: > Yes, it has battery-backed cache and it's working fine. > I'm worried about fact that simple > dd if=/dev/zero of=/zpool1 bs=8192k count=10240 > gives 40MB/s in zpool iostat > > Maybe Oracle settings are wrong? > Current settings are: > filesystemio_

Re: [perf-discuss] zfs write slow

2010-02-01 Thread Paul van den Bogaard
Hi ZFS has no equivalent for directio mounting. Did you try the set zfs:zfs_nocacheflush = 1 option? (see http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide#Tuning_ZFS_for_Database_Performance) Cheers Paul. On Feb 1, 2010, at 6:39 AM, Anatoly wrote: > > > gives 40MB/