Apache Ambari User Guide
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YARN - TimelineServer

Metrics to see the overall status for TimelineServer.

RowMetrics

Description

DATA READS

Timeline Entity Data Reads

Accumulated number of read operations.

Timeline Entity Data Read time

Average time for reading a timeline entity.

DATA WRITES

Timeline Entity Data Write

Accumulated number of write operations.

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.