| Package | Description |
|---|---|
| org.apache.hadoop.metrics2.lib |
A collection of library classes for implementing metrics sources
|
| Class and Description |
|---|
| DefaultMetricsSystem
The default metrics system singleton
|
| 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
|
| MutableRatesWithAggregation
Helper class to manage a group of mutable rate metrics.
|
| MutableRollingAverages
This class maintains a group of rolling average metrics.
|
| MutableStat
A mutable metric with stats.
|
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