Xianyin Xin created YARN-3652:
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             Summary: A {{SchedulerMetrics}} may be need for evaluating the 
scheduler's performance
                 Key: YARN-3652
                 URL: https://issues.apache.org/jira/browse/YARN-3652
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: resourcemanager, scheduler
            Reporter: Xianyin Xin


As discussed in YARN-3630, a {{SchedulerMetrics}} may be need for evaluating 
the scheduler's performance. The performance indexes includes #events waiting 
for being handled by scheduler, the throughput, the scheduling delay and/or 
other indicators.



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