Actually I'm using freeradius 2.1.10 and mysql 5.5.38 with 50K users and 40K accounting rows (they are purged each month). When I try an authentication request, it seems too slow: time echo "User-Name = user1,Password = xxxx" | radclient -x a.b.c.d:1812 auth testing123 Sending Access-Request of id 122 to 50.0.1.4 port 1812 User-Name = "3337822263" Password = "o24nu" rad_recv: Access-Accept packet from host a.b.c.d port 1812, id=122, length=26 Idle-Timeout = 600 real 0m0.870s user 0m0.012s sys 0m0.007s I have only 3 clients and in radius.log I see a lot of Fri Jul 15 10:01:19 2016 : Error: Discarding duplicate request from client owdata4 port 50368 - ID: 209 due to unfinished request 309 My clients are connected on the same lan of the freeradius server and I added indexes on table in mysql. Is there a way to speeding up my freeradius installation? Please let me know if I have to add more details. Thank you