Using Ambari Core Services
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YARN Applications

Metrics to see status of Applications on the YARN Cluster.

Table 1. YARN Applications metrices descriptions
Metrics Description
Applications By Running Time Number of apps by running time in 4 categories by default ( < 1 hour, 1 ~ 5 hours, 5 ~ 24 hours, > 24 hours).
Apps Running vs Pending The number of running apps vs the number of pending apps in the cluster.
Apps Submitted vs Completed The number of submitted apps vs the number of completed apps in the cluster.
Avg AM Launch Delay The average time taken from allocating an AM container to launching an AM container.
Avg AM Register Delay The average time taken from RM launches an AM container to AM registers back with RM.