Question

All,

I m building a network intensive application to consume real time financial marketdata and the network team is suspicious regarding its bandwidth usage per instance.

I m trying to use the System.Diagnostic performance counter "Bytes Total/sec" in the "Network interface" to get an idea of my application footprint on the network.

Here is my question : Can I compare the data measure by this performance counter with the data gather by the network team (they are using a probe on a Cisco router to monitor the traffic on a specific port between 2 machines) or is it 2 differents things ?

How the performance counter is compared to the real network usage as seen at the network level ? Optimistic or pessimistic.

Thanks for any though you can provide.

Regards

Answer 1

I worked on an application like this not too long ago. The performance counter tended to report less traffic for several reasons. Packets filtered by the firewall didn t make it into the Perf Counter count. Multicast traffic didn t always make it into the Perf Counter count.

For the most part the numbers trended together (e.g., initiating a large download would ramp up both the count on the router probe and and ramp up the count on the performance counter).

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