NMS-12987: Improve Observability #27
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… supported by the combination Beam/Flink/Prometheus)
…t (watermarks are also based on lastSwitched)
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Issue: https://issues.opennms.org/browse/NMS-12987
(now - flow.lastSwitched)for calculating Kafka drift. (Watermarks are based onlastSwitched, too.)flink_taskmanager_job_task_operator_flows_from_kafka_drift. Prometheus can be used to calculate some stats about that metric. In particular, in addition toavg,minandmaxwould be interesting.