Memory requirement/restart frequency of MogileFS processes.

[Justin Huff]

> They get pretty big, but don't usually bloat forever for me unless 
> there's a bug...
What is 'pretty big'? Any tunables you can recommend?

Both of my trackers have 2gig, and the replicate processes grow until 
the machine starts swapping.  In several cases, I have seen the OOM 
killer kick in.

The growth doesn't seem to happen continuously.  It'll stay flat for a 
day or two, then start growing for a few hours only to level off. I have 
yet to find any particular trigger.

--Justin