freeradius running in single server mode?

I'm running freeradius on debien 5.0 system. I have noticed that freeradius only fork one process whereas it's not running in single server mode: ps aux | grep '^freerad.*\/usr\/sbin\/freeradius' freerad 1930 1.6 3.9 833900 82072 ? Ssl Sep15 25:42 /usr/sbin/freeradius my options for threads pool are set as below: thread pool { start_servers = 5 max_servers = 64 min_spare_servers = 3 max_spare_servers = 10 max_requests_per_server = 0 } I thought I should have 5 freeradius processes forked at startup... Is there something wrong here? regards