In the Explorer panel of Enterprise Manager, select the Collaboration.
If the Connectivity Map is displayed in the Details panel, you can select the Collaboration in the Connectivity Map.
Click the Consumption tab.
The Waiting To Be Processed graphic lists the number of messages that are waiting to be processed by the Collaboration. This graphic appears only if the input to the Collaboration is a topic or queue.
The Processed By Collaboration graphic lists the number of messages that the Collaboration has processed.