metrics

func (*Histogram) Add ¶

func (h *Histogram) Add(other *Histogram)

Add returns a new Histogram which is the result of adding this and other bucket-wise.

func (*Histogram) Clone ¶

func (h *Histogram) Clone() *Histogram

func (Histogram) Mean ¶

func (h Histogram) Mean() uint64

Mean returns 0 if there are no samples, and h.Sum()/h.Samples otherwise.

func (*Histogram) Sample ¶

func (h *Histogram) Sample(v uint64)

Sample adds a uint64 data point to the histogram

func (*Histogram) SampleLen ¶

func (h *Histogram) SampleLen(l int)

SampleLen is a convenience wrapper around Sample which internally type asserts the int to a uint64

func (*Histogram) SampleTimeSince ¶

func (h *Histogram) SampleTimeSince(t time.Time)

SampleTimeSince is a convenience wrapper around Sample which takes the duration since |t|, if 0, rounds to 1 and passes to Sample() as an uint64 number of nanoseconds.

func (Histogram) Samples ¶

func (h Histogram) Samples() uint64

Samples returns the number of samples contained in the histogram

func (Histogram) String ¶

func (h Histogram) String() string

func (Histogram) Sum ¶

func (h Histogram) Sum() uint64

Sum return the sum of sampled values, note that Sum can be overflowed without overflowing the histogram buckets.