High Cardinality

Friend or Foe?

Jonatan Ivanov

In mathematics, cardinality is the measure of the number of elements (distinct values) of a set. For example, the set {200,404,503} contains 3 elements so the cardinality of it is 3. But what does “High Cardinality” have to do with (time series) metrics? Glad you asked, the answer is everything. :)