hard20 pts · first answer countsobservabilitypromqlsli

Fleet error rate done right

Instance A serves 1,000 req/s with 1% errors; instance B serves 10 req/s with 50% errors. Which query gives the true fleet error rate?

A.avg(rate(errors[5m]) / rate(requests[5m]))B.sum(rate(errors[5m])) / sum(rate(requests[5m]))C.max(rate(errors[5m]) / rate(requests[5m]))D.sum(rate(errors[5m])) / count(requests)

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Fleet error rate done right

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