delayed_due_to_message_rate_throttle

Type: Counter
Labels: queue

Number of times a message was delayed due to max_message_rate.

Note

This metric is subject to pruning, which means that it may age out and reset to zero when the corresponding internal resources idle- or age-out of the system. This is a memory management measure to prevent otherwise unbounded growth of memory over time.

Info

This metric has labels which means that the system will track the metric for each combination of the possible labels that are active. Certain labels, especially those that correlate with source or destination addresses or domains, can have high cardinality. High cardinality metrics may require some care and attention when provisioning a downstream metrics server.

Delayed in this context means that we moved the message back to its corresponding scheduled queue with a short retry time, as well as logging a Delayed log record.

Sustained increases in this value may indicate that the configured throttles are too severe for your workload, but it is difficult to make a definitive and generalized statement in these docs without understanding your workload, policy and the purpose of those throttles.

The metric is tracked per queue label. The queue is the scheduled queue name as described in Queues.