Metric cardinality calculator
See how many time series your metric labels produce, and which label to fix first.
How it works
Every distinct combination of label values is a separate series. The number of series is the distinct values of each label, multiplied together, for every metric name.
series = metrics × Π distinct valuesQuestions
What makes cardinality explode?
Labels with unbounded values: user IDs, request IDs, full URLs or timestamps.
Where should those values go?
On spans and logs, which are built for high-cardinality detail.