Metric counts individual observations from an event or sample stream in
configurable buckets. Similar to a summary, it also provides a sum of
observations and an observation count.
On the Prometheus server, quantiles can be calculated from a
histogram_quantile function in the query language.
Note that Histograms, in contrast to Summaries, can be aggregated with the
Prometheus query language (see the documentation for detailed
procedures). However, Histograms require the user to pre-define suitable
buckets, and they are in general less accurate. The Observe method of a
Histogram has a very low performance overhead in comparison with the Observe
method of a Summary.
with_opts creates a
Histogram with the
Add a single observation to the
HistogramTimer to track a duration.
LocalHistogram for single thread usage.
The type returned in the event of a conversion error.