YARN TimelineServer

Metrics to see the overall status for TimelineServer.

Table 1. YARN Timeline Server metrics descriptions
Row	Metrics	Description
DATA READS	Timeline Entity Data Reads	Accumulated number of read operations.
DATA READS	Timeline Entity Data Read time	Average time for reading a timeline entity.
DATA WRITES	Timeline Entity Data Write	Accumulated number of write operations.
DATA WRITES	Timeline Entity Data Write Time	Average time for writing a timeline entity.
JVM METRICS	GC Count	Accumulated GC count over time.
	GC Time	Accumulated GC time over time.
	Heap Usage	Current heap memory usage.
	NonHeap Usage	Current non-heap memory usage.