Apache Logging for performance tests

[peterzandbergen]

Dear All,
I want to use the apache log for performance testing of an application. What I need is the time it took to service a request, including the transfer time. I looked at the mod_log_config documentation, and see two format strings that refer to execution time, %T and %D.

I would like to know the difference between these two format strings, and if either one of them give the total time to serve the request, including the time it took to send the data to the client. So not just the time required for constructing the response on the server.

Thanks for you answer,
Peter

 

[siberian]

%D is in milliseconds, %T is in seconds.

Both should give total client connection time according to the docs but it does seem a bit vague, test it and let us know.