Java/J2EE Monitor

The Java/J2EE monitor is used to monitor application servers based on the Java and Java 2 Enterprise Edition (J2EE) platforms. It uses the Java Management Extensions (JMX) to extract performance data of the underlying appserver. Most commercially available Java/J2EE application servers are supported by the AppPerfect Monitor.

Listed below are some commonly monitored attributes of a Java/J2EE application server. Depending on how your AppPerfect administrator has setup the monitor for your Java/J2EE server, you may or may not see some or all these attributes.

Heap

Heap Used: Used memory in JVM run time
Heap Total: Total memory in JVM run time

Non-Heap

Non-Heap Used: Used memory in JVM run time
Non-Heap Total: Total memory in JVM run time

Classes

Loaded: Number of classes unloaded in JVM
Unloaded: Number of classes unloaded from JVM

Server

Name: Name of the server.
Current Open Sockets: Returns the current number of sockets open.
Total Open Sockets: Returns the total number of sockets open.
Server Restart Count: Returns the total number of restarts for this server since the cluster was last activated.

EJBs

Entity Beans

Name: Name of the entity bean.
Domain: Name of the domain.
Total nos of Activations: Returns the total number of beans from the EJB home that have been activated.
Total nos of Passivations: Returns the total number of beans from the EJB home that have been passivated.
Cache Count: Returns the total number of beans from the EJB Home currently in the EJB cache.
Cache Accesses: Returns the total number of attempts to access a bean from the cache.
Cache Hits: Returns the total number of times an attempt to access a bean from the cache succeeded.
Beans in use: Returns the total number of bean instances currently in use from the free pool.
Beans idle: Returns the total number of idle bean instances in the free pool.
Timed out Threads: Returns the total number of threads that have timed out waiting for an available bean instance from the free pool.
Threads Waiting: Returns the total number of threads currently waiting for an available bean instance from the free pool.
Transactions Committed: Returns the number of committed transactions.
Transactions Rolledback: Returns the number of transactions that were rolled back.
Transactions Timedout: Returns the number of transactions that were timed out.

Stateful Beans

Name: Name of the stateful bean.
Domain: Name of the domain.
Total nos of Activations: Returns the total number of beans from the EJB home that have been activated.
Total nos of Passivations: Returns the total number of beans from the EJB home that have been passivated.
Cache Count: Returns the total number of beans from the EJB Home currently in the EJB cache.
Cache Hits: Returns the total number of times an attempt to access a bean from the cache succeeded.

Stateless Beans

Name: Name of the stateless bean.
Domain: Name of the domain.
Beans in use from Pool: Returns the total number of bean instances currently in use from the free pool.
Beans idle in Pool: Returns the total number of idle bean instances in the free pool.
Timed out Threads: Returns the total number of threads that have timed out waiting for an available bean instance from the free pool.
Threads Waiting: Returns the total number of threads currently waiting for an available bean instance from the free pool.

Message Driven Beans

Name: Name of the message driven bean.
Domain: Name of the domain.
Beans in use from Pool: Returns the total number of bean instances currently in use from the free pool.
Beans idle in Pool: Returns the total number of idle bean instances in the free pool.
Timed out Threads: Returns the total number of threads that have timed out waiting for an available bean instance from the free pool.
Threads Waiting: Returns the total number of threads currently waiting for an available bean instance from the free pool.

Transactions Committed: Returns the number of transactions that were committed.

Transactions Rolledback: Returns the number of transactions that were rolled back.

Transactions Timedout: Returns the number of transactions that were timed out.

JSP/Servlets

Name: Returns the Name of the JSP/Servlet.

Domain: Name of the domain.

Invocations: Returns the number of times the servlet is invoked.

Average Execution time: Returns the average amount of time all invocations of the servlet have executed since creation.

Minimum Execution time: Returns the amount of time the single shortest invocation of the servlet has executed since creation.

Maximum Execution time: Returns the amount of time the single longest invocation of the servlet has executed since creation.

Databases/JDBC

Name:Names of the databases.

Domain: Name of the domain.

Current Active Connections: Current total number of active connections.

Maximum Active Connections: Returns the maximum active connections in this JDBCConnectionPoolRuntimeMBean. The count starts at zero each time the JDBCConnectionPoolRuntimeMBean is instantiated.

Maximum Pool Capacity: Returns the maximum capacity of this connection pool.
Total Connections: Returns the total number of JDBC connections in this JDBCConnectionPoolRuntimeMBean since the pool is instantiated.

JMS

JMS producer:

Name: Name of the JMS Producer.
Domain: Name of the domain.
Bytes Pending: Returns the number of bytes pending (uncommitted and unacknowledged) by this producer.
Bytes Sent: Returns the number of bytes sent by this producer since the last reset.
Messages Pending: Returns the number of messages pending (uncommitted and unacknowledged) by this producer.
Messages Sent: Returns the number of messages sent by this producer since the last reset.

JMS consumer:

Name: Name of the JMS consumer.
Domain: Name of the domain.
Bytes Pending: Returns the number of bytes pending (uncommitted and and unacknowledged) by this consumer.
Bytes Received: Returns the number of bytes received by this consumer since the last reset.
Messages Pending: Returns the number of messages pending (uncommitted and unacknowledged) by this consumer.
Messages Received: Returns the number of messages received by this consumer since the last reset.

JTA

Name: Name of the Java transactions API.
Domain: Name of the domain.
Transactions Committed: Returns the number of committed transactions.
Transactions Abandoned: Returns the number of transaction that were abandoned.
Transactions Rolled back: Returns the number of transactions that were rolled back.