Attribute	Attribute Meaning
total_count	Total cumulative number of offered deadline periods elapsed during which a DataWriter failed to provide data. Missed deadlines accumulate; that is, each deadline period the total_count will be incremented by one.
total_count_change	The change in total_count since the last time the listener was called or the status was read.
last_instance_handle	Handle to the last instance in the DataWriter for which an offered deadline was missed.

The deadline QoS set by the DataWriter was not respected for a specific instance