hey - it's NOT that complex you know... just because YOU seem to be afraid to dive under the hood and tinker with it, doesn't mean the REST of the world must behave like a spineless coward.
however, a cautionary "skim over the manual" is probably wise for ANY new kind of OS toy.
here's my tweeks:
vfs.zfs.arc_max="2147483648"
vfs.zfs.arc_min="536870912"
Helps a LOT on an older 8Gb RAM workstation. On a 4Gb RAM server box, I use about half those values.
Biting the hand that feeds IT
