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EJB --> Monitoring --> Message Driven EJBs

Tasks     Related Topics

Overview

The runtime information collected for a message-driven EJB is substantial and can be very useful for tuning and debugging the EJB. This console screen displays a variety of statistics about the state and performance of message-driven EJBs. The statistics are discussed in the following sections:

• Pooled Beans Current Count
• Beans In Use Current Count
• Pool Timeout Total Count
• Access Total Count
• JMSConnection Alive

Pooled Beans Current Count

Displays the current number of available bean instances in the free pool. This information is useful for tracking demand for your EJB. For example, this can be important when investigating an abnormal pool miss ratio.

Beans In Use Current Count

Displays the number of bean instances currently in use from the free pool. This information is useful for tracking demand for your EJB. For example, this can be important when investigating an abnormal pool miss ratio.

Pool Timeout Total Count

Displays the total number of Threads that have timed out waiting for an available bean instance from the free pool. This information is useful for calculating the pool timeout ratio.

Access Total Count

Displays the total number of times an attempt was made to get an instance from the free pool. This information is useful for giving context to the other free pool counts.

JMSConnection Alive

Reports whether the EJB container has successfully connected to the JMS destination source and that therefore the message-driven bean is receiving messages. If this field's value displays as false, check the server log for possible reasons for connection failure.

Tasks

Monitoring Message-Driven EJBs

Related Topics

EJB Runtime Monitoring