Tools / Datadog Interview questions
What is a forecast monitor in Datadog?
A forecast monitor projects a metric's future values based on its historical pattern - using linear or seasonal forecasting algorithms - and alerts when the predicted value is likely to breach a configured threshold, not just when the current value already has.
This is commonly used for capacity planning, such as predicting that disk usage will hit 100% in roughly ten days at the current growth rate, giving teams lead time to act before an actual outage.
Because it relies on historical trend, it needs enough consistent history to forecast reliably, and works best on metrics with a fairly steady or seasonal growth pattern rather than highly erratic ones.
A forecast monitor alerts based on:
A classic use case for forecast monitors is:
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