How to Build Alarms That Page on Root Cause, Not Just Output Count

A software engineering post on DEV Community outlines a common flaw in output-count alarms, using a background matching job as a practical example. The core problem is that a count of zero can mean either a system failure or a legitimately quiet period, making a single threshold unable to distinguish between the two. The author demonstrates that adding a streak hedge, such as requiring three consecutive zero-result nights, delays the false alert but does not resolve the underlying ambiguity. The proposed fix moves intelligence into the emitter itself, logging the reason a zero count occurred so the alarm reacts to cause rather than coincidence. The redesigned system requires no additional AWS cost, eliminates observed false pages, and records benign zero nights as a separate, unalarmed metric.