Build RED Metrics For An API
Define RED metrics for a request-serving API using bounded labels and latency distributions.
Define baseline service metrics for the account API so responders can see demand, failure, and latency by endpoint. Rate -> Errors -> Duration, with bounded labels The common trap is using host metrics as the whole health model. CPU can be normal while one endpoint fails every customer request. Rate Count requests per second using a request counter grouped by service.name, http.route, and http.request.method. Rate shows demand shape. Route templates keep cardinality bounded while preserving the endpoint view responders need. Errors Calculate error ratio from failed requests, grouped by route and status class such as 5xx or normalized failure class.…
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