[Dovecot] Dovecot + FreeBSD-7.2 + ZFS ?

[Dillon Kass]

Since 7.2 the only "tuning" I have been doing is raising my kmem size so 
I can have a larg arc_max.

I've been using 2gb arc_max with 2.8G kmem size. I haven't done any 
detailed tests but ZFS loves it's arc.

You should read this http://www.cuddletech.com/blog/pivot/entry.php?id=979

Check this out too, it's for FreeBSD http://loveturtle.net/arc_summary.sh

It's a 100% rip off and seems to work just as well.

ZFS v13 supports l2arc cache devices now too, so you can buy some really 
fast ssd and stick it in your pool for l2arc cache. works very well.