The ConnectionPoolMon utility is used to monitor all database connections in use by the ExtraView servlet. Database connections are finite in number and are created and destroyed by ExtraView as needed. The basic database connection parameters are set within the Configuration.properties file.
Running out of database connections will cause problems within your application, therefore it is important to ensure that when you create new connections in custom code, that you close them when the code completes its task.
Execute ConnectionPoolMon from a browser with request similar to –
Following is a sample of the screen generated with ConnectionPoolMon. Note that the screen automatically refreshes every 30 seconds. You can keep this window open while debugging your application. 
