[RADIATOR] Processing delay in Diameter

[Hugh Irvine]

Hello Arthur -

The best way to see what is happening is to run Radiator at trace 4 with LogMicroseconds enabled.

This will show you exactly how long each processing step is taking and how long Raditor is waiting for external resources.

As Heikki says, this sort of problem is almost always due to slow responses from SQL and/or LDAP databases (or sometimes slow DNS lookups).

regards

Hugh


> On 27 Mar 2015, at 19:56, Heikki Vatiainen <hvn at open.com.au> wrote:
> 
> On 26.3.2015 14.45, Kaspar Jasper wrote:
> 
>> My Diameter peer sometimes complains about Diameter timeouts, which is 5
>> seconds. Debugging leads me to the interesting detail - Diameter
>> messages sometimes are processing with delays in Radiator.
>> 
>> For instance, Radiator's server Wireshark capture:
>> No.    Time               Source         Destination   Protocol Length Info
>> 231521 09:00:58.997242000 xxx.xxx.xx.xx  xxx.xxx.xx.xx DIAMETER 1622
>> cmd=Accounting Request(271) flags=RP-- appl=Diameter Base Accounting(3)
>> h2h=253e8654 e2e=253e8654
>> 
>> But in the Radiator this request appears 5.2 second later:
>> Thu Mar 26 09:01:04 2015 029052: DEBUG: StateMachine::event event
> 
> Most likely you see this request as delayed because there is already a 
> queue in the OS receive buffer. That is, the previous messages have 
> taken longer than than usually.
> 
> I would take a look at the request processing flow and consider what 
> external lookups radiusd is doing. For example, DNS lookups, SQL DB 
> queries and so on. Some functions in Radius/Util.pm may do DNS lookups. 
> This can happen if they are given a name instead of IP address.
> 
> Thanks,
> Heikki
> 
> -- 
> Heikki Vatiainen <hvn at open.com.au>
> 
> Radiator: the most portable, flexible and configurable RADIUS server
> anywhere. SQL, proxy, DBM, files, LDAP, NIS+, password, NT, Emerald,
> Platypus, Freeside, TACACS+, PAM, external, Active Directory, EAP, TLS,
> TTLS, PEAP, TNC, WiMAX, RSA, Vasco, Yubikey, MOTP, HOTP, TOTP,
> DIAMETER etc. Full source on Unix, Windows, MacOSX, Solaris, VMS, 
> NetWare etc.
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--

Hugh Irvine
hugh at open.com.au

Radiator: the most portable, flexible and configurable RADIUS server 
anywhere. SQL, proxy, DBM, files, LDAP, NIS+, password, NT, Emerald, 
Platypus, Freeside, TACACS+, PAM, external, Active Directory, EAP, TLS, 
TTLS, PEAP, TNC, WiMAX, RSA, Vasco, Yubikey, MOTP, HOTP, TOTP,
DIAMETER, SIM, etc. 
Full source on Unix, Linux, Windows, MacOSX, Solaris, VMS, NetWare etc.