Why increase() Returns 27.5
Prometheus reports fractional counts for counters that only ever increment by one. The reason is a specific extrapolation rule, and knowing it tells you exactly when the number can be trusted.
DevOps
Delivery pipelines, infrastructure and operations.
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Your Observability Bill Is a Multiplication Problem
Cardinality does not creep up on you — it multiplies. Here is the arithmetic behind an exploding metrics bill, the four places the multiplication hides, and what actually shrinks it.