> have you increased the number of vnodes?  the default max vnode
> calculation tends to limit UBC usage to a fairly small portion
> of the total available RAM in my experience.

I whopped up the number of vnodes using sysctl - didn't seem to affect
things.

I would have thought that the UBC remembered which disk blocks memeory
held - so would have been independant of vnodes, but maybe someone
implemented something different.

    David