Mean service time for topic-less immediate messages (in microseconds).

C# |
public long topiclessImmediateMessagesMeanServiceTime()

Mean service time for topic-less Multicast Immediate Messaging (MIM)
messages (in microseconds). This is an exponentially weighted moving average
(weighted to more recent) for accumulated topic-less MIM message service
durations, measured from the point of de-queuement until the application has
finished servicing the message. Configuration option
queue_service_time_enabled must be activated.