Datadog unit of time for monitor time aggregation

Question

I've been trying to understand the time aggregation for Datadog monitoring alerts. The official doc http://docs.datadoghq.com/guides/monitors/#define-the-conditions I understand the idea of time aggregation, but I'm confused about the unit of time as it's not mentioned anywhere. Is it aggregating over 1 minute intervals? To rephrase this when I use sum(last_30m){X} is it summing the values of X for each minute? What about sum(last_1h){X} ? Is it still each minute?

Answer 1

Datadog monitors evaluate every minute, I think. So in your sum(last_30m){X} example, every minute, the monitor would sum the values of {X} over the last 30 minutes, and if that value was above whatever threshold you set, then it would trigger an alert. Same thing for sum(last_1h){X} , but every minute it would evaluate the sum over the last 1 hour.