Detect "stuck" queues

[getvega]

Is there a way to detect queues not acknowledging any messages? For instance for consumers having a prefetch, if those are blocking on a specific message (not unacking nor acking) - it completely block the entire queue.

For the moment we have an alert configured like this:

alert: RabbitUnackedMessagesHighRate
expr: (irate(rabbitmq_queue_messages_unacknowledged{cluster_name="production"}[5m]) * 60 * 5) > 5
for: 5m

... but for very "active" queues this might lead to false-positive alerts.