What Is the RED Method?
The RED method recommends tracking three metrics for every request-handling service: rate of requests, number of errors, and duration of requests. It frames monitoring around the work a service does for callers rather than the resources it consumes. Applied uniformly across services, it makes their dashboards consistent and comparable.
Why it matters
A standard, request-focused metric set lets any service be monitored the same way. RED is simple enough to apply everywhere while still surfacing most user-facing problems.
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