PMI for external monitoring
If you decide to use third-party tools to monitor WebSphere, then the following list will serve as a quick guide to the PMI you should be monitoring to ensure the health of your system.
Average response time
Response time statistics indicate how much time is spent in various parts of WebSphere Application Server and might quickly indicate where the problem is
Number of requests (transactions)
Enables you to look at how much traffic is processed by WebSphere Application Server, helping you to determine the capacity that you have to manage
Number of HTTP sessions
The number of live HTTP sessions reflects the concurrent usage of your site
Web server and EJB thread pools
Thread pools might constrain performance due to their size
Database and connection pool size
The thread pools setting can be too small or too large, therefore causing performance problems
Java Virtual Memory (JVM)
Use the JVM metric to understand the JVM heap dynamics, including the frequency of garbage collection...
