This project is a community driven fork of Lambda Probe. You just download it from http://code.google.com/p/psi-probe/ and deploy it to Tomcat.

In order to access this application you have to edit tomcat-users.xml file

<?xml version='1.0' encoding='utf-8'?>
<tomcat-users>
  <role rolename="manager"/>
  <role rolename="tomcat"/>
  <role rolename="admin"/>
  <role rolename="role1"/>
  <user username="both" password="tomcat" roles="tomcat,role1"/>
  <user username="tomcat" password="tomcat" roles="tomcat"/>
  <user username="admin" password="admin" roles="admin,manager"/>
  <user username="role1" password="tomcat" roles="role1"/>
</tomcat-users>

Then you can see:

• Active Sessions
• Running Threads
• Memory Utilization (if you add the jmx options to java_opts you can see detail memory graphs)

-Dcom.sun.management.jmxremote.port=7009
-Dcom.sun.management.jmxremote.ssl=false
-Dcom.sun.management.jmxremote.authenticate=false

and much more