InFlightCount: The number of messages that have been dispatched and are currently awaiting acknowledgment from the consumer. So as this number decreases, the DequeueCount increases.
AverageEnqueueTime: On average, the amount of time (ms) that messages remained enqueued. Or average time it is taking the consumers to successfully process messages.
EnqueueCount: The number of messages that have been written to the queue over the lifetime of the queue.
DequeueCount: The number of messages that have been successfully (i.e., they’ve been acknowledged from the consumer) read off the queue over the lifetime of the queue.
DispatchCount: The number of messages that have been dispatched (sent) to the consumer over the lifetime of the queue. Note that dispatched messages may not have all been acknowledged.