A sparse error metric is emitted only when failures occur. Long quiet periods should be treated as nonbreaching rather than as failures. Which alarm behavior should be evaluated?

1. Disable all actual error evaluation and notify only on metric creation.
2. Change only the numeric comparison threshold while leaving missing-data treatment unchanged.
3. Configure the appropriate missing-data treatment, such as notBreaching for this sparse error signal.
4. Treat every missing point as breaching because sparse metrics always mean an outage.