[Exim] Solving High Load Problem

We've recently moved from one server to another. The first server was running exim 3.33 perfectly for quite a long time now. The new server(an identical box) seems to hold on to exim processes every now and then. It wont let them go until I run /etc/rc.d/init.d/exim stop. This will drop the load
from 25 back to <1. Then I start up exim with /usr/exim/bin/exim -bd -q1h and all is well for another day.

One thing I noticed to be differant from this server to the other is the existance of these directories.
/var/spool/mail/db
/var/spool/mail/msglog
/var/spool/mail/input

These directories never existed in this location before.
They where in /var/spool/exim/db, msglog, input
How do I change where exim stores these?
My /var/spool/mail is a network block device. I would rather put them in /var/spool/exim
Any ideas?

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Joseph Kezar