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.
Observability
Metrics, traces, logs and everything they cost.
2 posts
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.