Reader time limit is the amount of time in seconds that the Integration Service reads source messages from the real-time source before it stops reading from the source. Use reader time limit to read messages from a real-time source for a set period of time. 0 indicates an infinite period of time.
For example, if you use a 10 second time limit, the Integration Service stops reading from the messaging application after 10 seconds. It processes the messages and ends the session.