users@glassfish.java.net

Re: performance issues glassfish ejb3.0

From: <glassfish_at_javadesktop.org>
Date: Sun, 24 Feb 2008 23:57:21 PST

hello,

so my small test-case is doing the following (sorry i don't have the code here):

- JSP takes username and password and calls a "validate" method on a SLSB
- SLSB validates the given strings against hardcoded values and sends back a status (accept,decline)

for testing i use the performance tool openwebload (http://openwebload.sourceforge.net) which gives the possibility to simulate concurrent access by more than one users.

i ramp up from 300 to 600 concurrent users and notice the maximum TPS of about 400 - 450 TPS.

another thing i realized is that the cpu on the server machine is utilized 100% during testing but the memory usage does not increase with the amount of users (stays at 50%). imho that is a very strange behaviour.

if you want i can post the code (which i think is not that interesting) and the detailed openwebload output later when i am at home again.

thanks for help,

mario
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