Hi,
I'm running this version of FR:

# freeradius  -v
freeradius: FreeRADIUS Version 2.1.10, for host i486-pc-linux-gnu, built on Nov 14 2010 at 20:41:03

OS is:
# cat /etc/debian_version
6.0.5
# uname -ar
Linux 2.6.32-5-686 #1 SMP Sun May 6 04:01:19 UTC 2012 i686 GNU/Linux

it's a VMware VM with 4 vCpu and 1 GB RAM. Auth module is MySQL.

FR is working but it takes 100% CPU.
Other strange thing is that load does not rise more than 1 (it should be 4 or more).
Any suggestion?

This is my relevant config:

max_request_time = 60
cleanup_delay = 5
max_requests = 102400   (I've 18 clients)
thread pool {
     start_servers = 32
      max_servers = 256
       min_spare_servers = 5
        max_spare_servers = 20
   max_requests_per_server = 0
}

sql.conf

sql {
    num_sql_socks = 8
    connect_failure_retry_delay = 60
}

Thank you very much