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Here is the list of hadoop-metrics2.

• jvm
  • jvm.JvmMetrics (All)
• dfs
  • dfs.namenode (NameNode)
  • dfs.FSNamesystem (NameNode)
  • dfs.datanode (DataNode)
• yarn
  • yarn.NodeManagerMetrics (NodeManager)
  • yarn.QueueMetrics (ResourceManager)
  • yarn.ClusterMetrics (ResourceManager)
• rpc
  • rpc.rpc (All)
• rpcdetailed
  • rpcdetailed.rpcdetailed (All)
• mapred
  • mapred.ShuffleMetrics (NodeManager)
  • mapred.MRAppMetrics (ApplicationMaster)
• ugi
  • ugi.UgiMetrics (All)
• metricssystem
  • metricssystem.MetricsSystem (All)

The list is targeted for trunk and 2.x version of hadoop. The list for 1.x version is now under construction.

What is the hadoop metrics2? -> See Cloudera blog.