Alerting not firing as often as expected


I have a rule which evaluates every 60s. Since I set a very low threshold, I’m expecting an alert every 60s.

However, I did see one alert in my slack channel in the beginning. I did not see it every 60s. And every time I “Test Rule”, it returns firing is true.

Any idea why it is so?

It only fires notifications when the state changes, so it has to go back to OK for a new notification to be sent