Interface Histogram

prometheus/histogram.go:249–261

The nativeHistogramBounds above can be generated with the code below. TODO(beorn7): It's tempting to actually use `go generate` to generate the code above. However, this could lead to slightly different numbers on different architectures. We still need to come to terms if we are fine with that, or

//
// To create Histogram instances, use NewHistogram.
type Histogram interface {
	Metric
	Collector

	// Observe adds a single observation to the histogram. Observations are
	// usually positive or zero. Negative observations are accepted but
	// prevent current versions of Prometheus from properly detecting
	// counter resets in the sum of observations. (The experimental Native
	// Histograms handle negative observations properly.) See
	// https://prometheus.io/docs/practices/histograms/#count-and-sum-of-observations
	// for details.
	Observe(float64)
}

// bucketLabel is used for the label that defines the upper bound of a
// bucket of a histogram ("le" -> "less or equal").