Yes sorry, I meant "count".

But my question is more related to stateless session beans.

The maxium pool size of SLSB can be configured in the standalone.xml like:

<strict-max-pool name="slsb-strict-max-pool" max-pool-size="20" instance-acquisition-timeout="5" instance-acquisition-timeout-unit="MINUTES"/>

What I am interested in is how many of them are currently used? Is there also a way to get that information through JMX? Or any other possibility?

Yes, something like this.

But I am not really sure, if that value counts the active SLSB.

Firstly, the counter is not increasing, while an application with SLSB is being executed. Secondly, the value "maxThreads" is set to 10 (please see my attachment), but the SLSB max-pool-size is set to 20.

When I looked through the JMX tree for the first time, I thought the entry "slsb-strict-max-pool" would have a counter for the active SLSB, but there you can just configure the same values like in the standalone.xml.

Maybe I am doing something wrong or any option needs to be activated, so that these statistics are collected.

I use the standalone.xml "out of the box", just like a fresh downloaded JBoss AS 7.1.1 Final instance.

Then you could put a simple application on the server. For example a servlet, which gets a SLSB providing some simple logic (maybe a Thread.sleep(100), mathematical calculation or something like this) injected.

So if you stress test this application afterwards with a tool like lets say Apache JMeter and build a testplan, which starts about 10-15 threads, then I think the counter should already start increasing.

No, unfortunately not.

As stated here http://www.mastertheboss.com/jboss-performance/jboss-as-7-performance-tuning/page-3, there really seems to be currently no implementation like a counter or something else. So I'll hope, this will be added soon, because it would be very comfortable!

So for the moment I just need to leave the question unanswered. Nevertheless thank you for your help, I really appreciate it!

Thank you for the hint, but if I enter that command via CLI I get the following output:

[standalone@localhost:9999 /] /subsystem=ejb3:write-attribute(name=enable-statistics,value=true)
{
    "outcome" => "failed",
    "failure-description" => "JBAS014792: Unknown attribute enable-statistics",
    "rolled-back" => true
}

Finally I found an entry in the JMX tree of JBoss AS 7.1.1 Final, which will show at least the statistics for a specific bean (please see attached screenshot).

So you need to choose the deployed application and under that entry are some statistics about the components used in that application (like servlets, ejbs, etc.).

Just wanted to let you know!

Hi Ramesh,

sorry, I just noticed your reply today after logging in again for a while.

If you simply connect via JMX to the JBoss AS 7.1.1 Final (or any other version above) you will find these entries, which I showed on the screenshot.

I hope this will help you, otherwise don't hesitate to ask further questions.