I'm running FreeRADIUS on a PC with a dual CPU of 2 GHz and 2 GB of RAM. It is working with PostgreSQL database. When I perform tests with radperf, running : radperf -s -f ../users.csv -p 800 -a pap 10.3.1.1 auth radiussomething where users.csv file contains 10000 user names with password, I get this output: Total succeeded : 3811 Total failed : 6189 Total no reply : 0 Total time (s) : 10.588 Packets/s : 944 Response times: < 10 usec : 0 < 100 usec : 0 < msec : 0 < 10 msec : 1 < 0.1s : 3758 < s : 5897 < 10s : 344 < 100s : 0 (the result is a good one taking in account the packets amount processed per second - related to more tests that I did). I would need a sever able to manage a much greater amount of users ( > 50000, up to 1000000). But for now I'm interested how to get the server working well with ~(50000<->100000) users. What configuration do I need for this (I mean hardware configuration)? What are the best recommended improvements that should be done? Would JRadius module help on improving performance? (I'm not familiar about JRadius). Thanks for any suggestions. N.B. In attachment you have the important part from output of running radiusd -XXX together with with radperf.