I have my slaves running out of different directory's to my main (I have 3 copys split over 3 different drives) All the slaves have their settings turned down to absolute minimum.
Having the directorys split over 3 drives means when I hit an bit area like Org it doesnt have to load 5 copys of it from 1 drive (When I had it all on 1 drive my HDD would go insane when I hit org)