Performance Degradation

[vinay]

Hello,
We are trying to benchmark JBoss 3.0.4-Tomcat 4.1.12 and seem to find that the perfomance degrades consistently when the server is hit with a sustained load. For e.g. while the first time we run a suite of 400 transacations it runs it in apprx 5.5 mins while the second time around it take 6 mins and the third time it takes 7.5 mins.
This is with just one user hitting the server [a 4 CPU Sun Solaris V 480. Have tried starting the server with 1GB to 3 GB of RAM].
The commit option is C and the max CMP bean capacity is 1000 [have lowered this number]. The connection pool is set to 100/500 and is not going beyond the minimum setting. The application is a mix of Stateless Session Beans [approx 100], CMP Beans [approx 75 reado only and 75 read-write] and a couple of MDBs. The JMS queues use the default settings.

Any ideas??

Regards

Vinay

[timm]

Hi,

I've unfortunately no ideas :-(, but encounter performance problems too.

We tested our web application by means of HttpUnit suite in 10 parallel processes. The same Java code (generated with xDoclet):

- WebLogic - stable, quick enough
- JBoss - instable, ending with no response
But we get a lot of "reentrant call detected..." exceptions. We will try to eliminate them and then repeat our tests.

JBoss 3.0.4-Tomcat 4.1.12, W2K - one processor ;-)

Regards
Timm