What actually constitutes "high" cardinality?

InfluxDB 2
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1

I understand that we can calculate cardinality based on the number of unique combinations of measurement, field key, and tag set.

But what actually constitutes a high number? Should we think of it in terms of Big O?

2

Hello @atlas_codes,
Welcome!
High also depends on the volume of data you’re ingesting and the hardware you’re running on. There’s a trade off between amount and cardinality.
here’s a general guideline:

With inlfuxdb v3 you don’t have to worry about cardinality though fwiw.

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Thanks! This is the kind of thing I was hoping to find.

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