This is a very vague question. You'll have to narrow down the problem to a specific use case and do some debugging/profiling to narrow it down. If it then turns out to be anything related to JBoss EAP, you can post the relevant details.
Sorry for vague question. Actually we have developed performance test for our application which was deployed in 5.x and we ran same test after upgrading to JBoss 7.1.1. Above are the observations after trying different combinations. When we monitor it using JVisualVM we see most of the things are fine. Our memory does not reach max limit. CPU utilization shows spikes between 60 to 100%. When we enabled our logging we saw that most of the operation’s like processing messages is faster in 7.1.1.
The thing I wanted to know was if anyone can think of any configuration option we might be missing or suggests particular area to debug