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Merge pull request #7522 from prometheus/beorn7/doc

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Add an explanation for φ-quantile to the operators section
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Björn Rabenstein 2020-07-06 22:15:52 +02:00 committed by GitHub
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docs/querying/operators.md
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@ -226,6 +226,11 @@ time series is the number of times that sample value was present.
the input samples, including the original labels, are returned in the result
vector. `by` and `without` are only used to bucket the input vector.
`quantile` calculates the φ-quantile, the value that ranks at number φ*N among
the N metric values of the dimensions aggregated over. φ is provided as the
aggregation parameter. For example, `quantile(0.5, ...)` calculates the median,
`quantile(0.95, ...)` the 95th percentile.
Example:
If the metric `http_requests_total` had time series that fan out by