@InterfaceAudience.Public @InterfaceStability.Evolving

Package org.apache.hadoop.metrics2.lib

A collection of library classes for implementing metrics sources

See: Description

Class Summary

Class	Description
Interns	Helpers to create interned metrics info
MetricsRegistry	An optional metrics registry class for creating and maintaining a collection of MetricsMutables, making writing metrics source easier.
MutableCounter	The mutable counter (monotonically increasing) metric interface
MutableCounterInt	A mutable int counter for implementing metrics sources
MutableCounterLong	A mutable long counter
MutableGauge	The mutable gauge metric interface
MutableGaugeInt	A mutable int gauge
MutableGaugeLong	A mutable long gauge
MutableMetric	The mutable metric interface
MutableQuantiles	Watches a stream of long values, maintaining online estimates of specific quantiles with provably low error bounds.
MutableRate	A convenient mutable metric for throughput measurement
MutableRates	Helper class to manage a group of mutable rate metrics
MutableStat	A mutable metric with stats.

Enum Summary

Enum	Description
DefaultMetricsSystem	The default metrics system singleton.

Package org.apache.hadoop.metrics2.lib Description

A collection of library classes for implementing metrics sources