| Package | Description | 
|---|---|
| org.apache.hadoop.metrics2.lib | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | MetricMutableQuantilesWatches a stream of long values, maintaining online estimates of specific quantiles with provably
 low error bounds. | 
| class  | MutableHistogramA histogram implementation that runs in constant space, and exports to hadoop2's metrics2 system. | 
| class  | MutableRangeHistogramExtended histogram implementation with metric range counters. | 
| class  | MutableSizeHistogramExtended histogram implementation with counters for metric size ranges. | 
| class  | MutableTimeHistogramExtended histogram implementation with counters for metric time ranges. | 
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