Monitoring Queue Statistics

Rqueue support micrometer library for monitoring.

It provides 4 types of gauge metrics.

  • queue.size : number of tasks to be run
  • dead.letter.queue.size : number of tasks in the dead letter queue
  • scheduled.queue.size : number of tasks scheduled for later time, it’s an approximate number, since some tasks might not have moved to be processed despite best efforts
  • processing.queue.size : number of tasks are being processed. It’s also an approximate number due to retry and tasks acknowledgements.

Execution and failure counters can be enabled (by default this is disabled).

We need to set count.execution and count.failure fields of RqueueMetricsProperties

1. execution.count
2. failure.count

All these metrics are tagged

Spring Boot Application

  1. Add micrometer and the exporter dependencies
  2. Set tags if any using rqueue.metrics.tags.<name> = <value>
  3. Enable counting features using rqueue.metrics.count.execution=true , rqueue.metrics.count.failure=true

Spring Application

  1. Add micrometer and the exporter dependencies provide MeterRegistry as bean
  2. Provide a bean of RqueueMetricsProperties, in this bean set all the required fields.

Grafana Dashboard