Metrics Fundamentals
Metrics are numeric observations about a system collected over time. They show rates, current levels, and distributions so you can understand behavior and decide where to investigate.
itObservability and performance | OpenSkills.info
Intro
Metrics Fundamentals
Metrics turn repeated observations into time series. Each observation answers a narrow question: how many requests completed, how much memory is in use, or how long a request took. A metrics system stores observations with timestamps so you can compare the present with the recent past.
A metric is evidence, not a verdict on system health. A low CPU reading does not prove that users can complete a request. Start with the behavior you need to understand, then choose the measurement that can expose it.
The metric model
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