Incorrect throughput being seen in report and differing PGL configs

[Alex Rousskov]

On 08/02/2011 11:15 AM, Dmitry Kurochkin wrote:

> On Tue, 02 Aug 2011 14:51:09 +0100, Mohammed Rakhada <morakhad at cisco.com> wrote:

>> throughput: 4196.00xact/sec or 608.43Mbits/sec
>>
>> however when I am looking at the switch statistics the number reported
>> is much lower (360Mbits/sec)
>>
>> Could you clarify what the throughput value actually relates to?
>>
> 
> Throughput on the index page of HTML report is client side reply
> throughput, i.e. (size of all replies clients received) / duration).  It
> does not include requests or replies sent by servers.
> 
> I am not sure why you see lower throughput stats on the switch.  You may
> get wrong stats in reporter if you specify a single log multiple times
> on the command line.  I do not think it is likely, but this may be a bug
> in Polygraph reporter or client.

Another possibility here is that the switch is counting traffic volumes
over a longer (or shorter!) periods of time while Polygraph reporter is
using response volume during the specified test phase(s).

If you want to investigate this further, running longer tests with fixed
response sizes while looking at runtime switch stats may be useful.

HTH.

Alex.