Edit the file hadoop-metrics.properties, if it is not already present in your config directory. The file should contain at least the following lines: dfs.class=org.apache.hadoop.metrics.ganglia.GangliaContext dfs.period=10 dfs.servers=<at:var at:name="GANGLIA" />:8649 mapred.class=org.apache.hadoop.metrics.ganglia.GangliaContext mapred.period=10 mapred.servers=<at:var at:name="GANGLIA" />:8649 jvm