Hi,

     I have developed web services which would return a hard coded string as response. The same application has been deployed in jboss 7.1.1 server.

While running load test on the operation, i have observed that the average response time increases linearly with increase in number of threads. The number of requests being sent is constant.

I have attached the sample application used for testing and the source code.

Observations:

No of threads -> no of requets -> average response time

1st Iteration

----------------

1  thread  -> 10000 requests -> 4 milli seconds

2nd Iteration

----------------

10 threads -> 10000 requests -> 7 milli seconds

3rd Iteration

----------------

20 threads -> 10000 requests -> 9 milli seconds

4th Iteration

----------------

30 threads -> 10000 requests -> 12 milli seconds

5th Iteration

----------------

40 threads -> 10000 requests -> 14 milli seconds

6th Iteration

----------------

50 threads -> 10000 requests -> 16 milli seconds

Configuration:

OS           : Cent OS 6.2

Java         : sun jdk 1.7.0_15

Jboss        : jboss as 7.1.1

Testing Tool : Jmeter

In standalone configuration, domain:threads max-threads has been configured to 487 and slsb-strict-max-pool size to 3000.

Why does the average response time increase with increase in number of threads?

Is there any other configurations that has been missed out.

Regards,

Vedanth