freeradius high cpu load

Bassem Mettichi mettichi at
Thu Jan 18 16:00:26 CET 2018


thanks a lot for your response, we need these number of accounting start
because our Customer is a telecom operator so weed more than 6000
accounting start / second
but just ia clarification: for accounting start i don't use rlm_perl iam
suing rediswho module so why i have this higher CPU usage? could you give
me an explanantion for this behavior with freeradius?

Best Regards
Mettichi Bassem

2018-01-18 15:48 GMT+01:00 Alan DeKok <aland at>:

> On Jan 18, 2018, at 9:08 AM, Bassem Mettichi <mettichi at> wrote:
> > iam using freeradius version 3.0.15 with rlm_redis and rlm_perl.
>   Perl is slow.  Very, very, slow.
> > on this server i have 4 VCPU, when i start a becnh test with 6000
> > accounting start / sec i see that all my 4 VCPU  are used 97% for every
> > vcpu any advise please to minimize the use of vcpu on freeradius?
> a) send it fewer packets per second
> b) make it do less work per-packet
>   Those are your two choices.
>   So I'll echo Adam's comment.. what are you doing with those packets?
>   As an explanation, if you put user entries into the "users" file, the
> server will happily authentication 20K packets/s on a single CPU.
>   So any *higher* CPU usage is something you did to your local
> configuration.
>   Alan DeKok.
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