| Package | Description | 
|---|---|
| org.apache.hadoop.metrics2.lib | A collection of library classes for implementing metrics sources | 
| Modifier and Type | Method and Description | 
|---|---|
| static MetricsSystem | DefaultMetricsSystem. initialize(String prefix)Convenience method to initialize the metrics system | 
| static MetricsSystem | DefaultMetricsSystem. instance() | 
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