Package sample provides various statistical operations and algorithms.

LenOf reads the metric value from the given slice/map/chan.

NoGraph says to not visualize the metric as a graph.

Distribution says to collect/visualize histogram of individual sample distributions.

Rate says to collect/visualize metric rate per unit of time rather then total value.

Graph allows to combine multiple related metrics on a single graph.

Level controls if the metric should be printed to console in periodic heartbeat logs, or showed on the simple web interface, or showed in the expert interface only.

Link adds a hyperlink to metric name.

Prometheus exports the metric to Prometheus under the given name.

StackedGraph is like Graph, but shows metrics on a stacked graph.