FreeRadius Server Sizing recommendations

Rui Ribeiro ruyrybeyro at
Thu Sep 4 09:46:12 CEST 2014

As said bellow the thread, use benchmarking tools.
I am authentication 15k users in AD (3 times as much of you), Vmware VM.
3-5k daily users and 512-800MB of RAM is more than enough for me for
running FreeRadius (in fact in memory the binaries only use 70MB).  The
detail accounting only grows in the tune of 3GB per month. The MySQL
database is on another server. As for the MySQL server you may need more
1-2GB, so 4GB is more than enough for a dedicated server without bloat and
FreeRadius + MySQL). My CPU requirements are also *very* low, two CPUs load
average: 0.00, 0.01, 0.05.


> From: "Wang, Yu" <ywang10 at>
> To: "dxu at" <dxu at>, FreeRadius users mailing list
>         <freeradius-users at>
> Subject: RE: FreeRadius Server Sizing recommendations
> Message-ID:
>         <712E6E5D87B90E4E833ADC4B96D9C9A3326BBC8A at>
> Content-Type: text/plain; charset="us-ascii"
> A server with Xeon 2.4 GHz dual core CPU, 4-8GB RAM, 250GB 7.2k SATA hard
> drive, dual port gigabit NIC will be sufficient for your system. You can
> achieve 10 auths/sec easily with most default settings on radius and
> samba/winbind.
> Yu Wang
> -----Original Message-----
> From: at
> [ at] On
> Behalf Of Dennis Xu
> Sent: Tuesday, September 02, 2014 2:57 PM
> To: A L M Buxey
> Cc: FreeRadius users mailing list
> Subject: Re: FreeRadius Server Sizing recommendations
> I am not sure about the certificate size. But it will be using 2048bit
> key. The concurrent authentication request will be less than 10 per second.
> Backend authentication will use Active Directory.
> thanks.
> Dennis
> ----- Original Message -----
> From: "A L M Buxey" <A.L.M.Buxey at>
> To: dxu at, "FreeRadius users mailing list" <
> freeradius-users at>
> Sent: Tuesday, September 2, 2014 10:45:10 AM
> Subject: Re: FreeRadius Server Sizing recommendations
> Hi,
> > Does FreeRadius has a server sizing guide to help people to choose the
> right hardware? I want to deploy two Linux servers(on VMware) in
> active/standby mode to serve maximum 5k PEAP authentication users. What
> would be the recommended server specs(such as CPU,RAM,Storage,IOPs) for
> this deployment?
> certificate size? concurrent authentication requests? backend
> authentication method?
> there is no direct sizing guide but there are benchmarking tools that you
> can use to get a measure of performance/capacity
> alan
> -
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