An operator wants a simple built-in signal showing whether each target was reachable on its last scrape before writing more advanced alerts. Which automatically generated series should they use?

A mentor explains that Prometheus distinguishes one time series from another even when both use the ...

A team runs four identical API processes on four scrapeable endpoints. In Prometheus terminology, wh...

An application currently exposes separate metrics named `http_responses_200_total` and `http_respons...

A service starts adding the label `environment='prod'` to a metric that previously had no `environme...

An SRE wants a monitoring system that still gives useful answers during an outage even if remote sto...