FRS-3.0.4 Questions about radiusd.conf

I have some questions about the max_queue_size and max_requests_per_server which can be set in radiusd.conf . Max_queue_size is commented out by default; does that mean the default is infinity? Also, what are the thoughts of the community on max_requests_per_server? Do most of you leave that value at 0 (=infinity) or set it to some value and force the server to reset resources every so often? Inline comments suggest it's not normally needed.