Re: ZFS performance strangeness

2011-04-21 Thread Lars Wilke
Hi, thanks to all who answered. * Damien Fleuriot wrote: I refer you to this post by Jeremy Chadwick with tuning values *AND* their actual explanation. http://lists.freebsd.org/pipermail/freebsd-stable/2011-February/061642.html Good post indeed, but i think i found my problem elsewhere,

ZFS performance strangeness

2011-04-12 Thread Lars Wilke
Hi, There are quite a few threads about ZFS and performance difficulties, but i did not find anything that really helped :) Therefor any advice would be highly appreciated. I started to use ZFS with 8.1R, only tuning i did was setting vm.kmem_size_scale=1 vfs.zfs.arc_max=4M The machines are