Monitoring Topics and Queues

You can use Enterprise Manager to monitor message traffic in topics and queues.

To Monitor Topics and Queues

1. In the Explorer panel of Enterprise Manager, select the JMS IQ Manager node (for example, IQ_Manager_18007).

2. In the Details panel, click the Topics tab.

   The following table describes the columns in the Topics tab.

   Column Name	Description
   Topic Name	The name of the topic.
   Min Sequence Number	The sequence number of the oldest message available for this topic. If no messages are available, this column shows the sequence number of the last message processed.
   Max Sequence Number	The sequence number of the most recent message available for this topic. If no messages are available, this column shows the sequence number of the last message processed.
   Available Count	The number of messages for this topic that are still unprocessed by at least one subscriber.
   Number of Subscribers	The number of subscribers registered to consume messages for this topic (including durable subscribers that are currently disconnected).
   Last Published Date/Time	The date and timestamp of the most recent message currently available in the topic. If no messages are available, this column shows the last publication date and time of the last message.

3. Click the Queues tab.

   The following table describes the columns in the Queues tab.

   Column Name	Description
   Queue Name	The name of the queue.
   Min Sequence Number	The sequence number of the oldest message available for this queue. If no messages are available, this column shows the sequence number of the last message processed.
   Max Sequence Number	The sequence number of the most recent message available for this queue. If no messages are available, this column shows the sequence number of the last message processed.
   Available Count	The number of unprocessed messages in the queue.
   Number of Receivers	The number of receivers for this queue.
   Last Published Date/Time	The date and timestamp of the most recent message currently available in the queue. If no messages are available, this column shows the last publication date and time of the last message.

4. When you select a topic or queue, the Messages tab in the lower portion of the Details panel displays information about the topic or queue. The Messages tab includes a toolbar.

5. If journaling is enabled, then you can switch between displaying live and journaled messages by clicking the Show Live and Show Journaled icons in the toolbar. If journaling is not enabled, then these buttons do not appear.

6. Topics also include a Summary tab and a Subscribers tab. The Subscribers tab displays information about durable subscribers. The toolbar enables you to create a new durable subscriber and to unsubscribe an existing durable subscriber.