Gap measure RMQ

[alexeyzimarev]

There's no gap for RMQ, but lead-time is relevant. Also, a subscription queue size basically tells how many events aren't processed. RMQ management API could help. The limitation is that the management API plugin must be added to the RMQ deployment.

[alexeyzimarev]

Considering this as low priority as the unprocessed message count can be easily measured by monitoring RMQ queue length from the APM provider side.