Follow these steps to increase the WebSphere® Business Monitor destination queue size.
You may need to increase the maximum size of the destination queue that receives the events messages from the event bus used by the Monitor Server. The need for this is to avoid any event loss in case the Monitor Server application is stopped or events consumption is blocked due to any runtime exceptions, and thus the events messages are not consumed from the bus destination queue so that the queue will be filled of messages and any incoming event message will not be saved in the queue. Also this situation will happen if the rate of the incoming messages is significantly grater than the rate of the message consumption by the Monitor Server, and consequently the queue may get full of messages and event loss will occur.
In order to increase the WebSphere Business Monitor destination queue size: