Hi Monks

A little background:

I have a radius server (OSC Radiator on FreeBSD 8.2) which logs radius accounting packets to a postgresql 8.4 database, via the PERL DBD:Pg and DBI database interface modules. In general, I've been seeing performance issues when logging to the postgresql database, and when I turn off logging to the database, the performance issues vanish. The performance issues I see manifest on the NAS end of the "chain of information flow", basically, the server sending radius accounting packets to the radius server indicates dropped and retried attempts when I enable logging to the database on the radius server, and immediately begins working optimally when I disable the database on the remote radius server.

All this leads me to think that there is some kind of performance issue at either of 3 layers of the overall system:

1. The Radiator server software itself. 2. The Postgresql Server software 3. The interface between Radiator and Postgresql (PERL DBD::Pg and DBI)

Here is a somewhat simplified depiction of the informaton flow:

{NAS}---{radius accounting packets over network}--->{radius server software}--{PERL DBI, DBD}-->{Postgresql}{underlying server OS and hardware}

My Question is: How would I analyse (or otherwise isolate performance issues) around the DBD:Pg and DBI perl interface between the radius software and the postgresql database ?

Many thanks in advance for your wisdom.

Traiano

In reply to DBI and DBD::Pg: Assessing Performance by traiano

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