[RADIATOR] Radiator AAA stats

[Heikki Vatiainen]

On 21.07.2017 17:59, rohan.henry cwjamaica.com wrote:

> How do I confirm or calculate the number of concurrent requests a single 
> Radiator instance can handle?

It's hard to say how to calculate this. It depends on what the instance 
is configured to do. For example, if it has to proxy requests, you are 
likely going to be bounded by CPU performance. If there are database 
lookups, the instance may need to wait DB responses while its CPU 
utilisation stays low.

> How can I view stats to know when the instance is nearing capacity?

I'd watch CPU utilisation and UDP receive errors (netstat -u -s). The 
UDP receive errors increase if the receive buffer fills up and the 
kernel has to start dropping incoming Radius UDP messages.

If Radiator logs that it is receiving duplicate requests, this may 
indicate that the client is not getting responses as quickly as it needs 
(or the responses are dropped between Radiator and the client). The 
duplicates may indicate that there are problems handling the requests in 
timely manner.

Depending on your configuration there can be other indicators too, but 
the above should give a starting point.

Thanks,
Heikki

-- 
Heikki Vatiainen <hvn at open.com.au>