Every article tagged Monitoring, in one place.
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Monitoring tells you that something is wrong. Observability helps you understand why , including for problems you didn't predict. It's built from three kinds of telemetry. Metrics: numbers over time http_requests_total{route="/checkout", status="500"} 1243 htt...
Prometheus is the most widely used open-source metrics system. Your app exposes current values on a /metrics endpoint, and Prometheus scrapes them every few seconds and stores them as time series. The metric types Counter - only goes up (resets on restart): re...
You can measure thousands of things. These three well-known frameworks tell you which handful matter most. The four golden signals From Google's SRE book, for any user-facing system: Latency - how long requests take. Track successful and failed requests separa...
"Make it reliable" isn't a goal you can measure. Service level objectives turn reliability into a number that product and engineering can agree on. The terms SLI (indicator) - a measurement of user experience, usually a ratio of good events to total events. Ex...
When alerts fire constantly, people stop reading them, and the one that matters gets missed. Good alerting is mostly about deciding what not to page on. 1. Every page must be urgent and actionable Ask: "If this fires at 3 a.m., does someone need to do somethin...
