Miklos Szegedi created YARN-6361:
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Summary: FSLeafQueue.fetchAppsWithDemand CPU usage is high with
big queues
Key: YARN-6361
URL: https://issues.apache.org/jira/browse/YARN-6361
Project: Hadoop YARN
Issue Type: Bug
Reporter: Miklos Szegedi
Priority: Minor
FSLeafQueue.fetchAppsWithDemand sorts the applications by the current policy.
Most of the time is spent in FairShareComparator.compare. We could improve this
by doing the calculations outside the sort loop (O(n)) and we sorted by a fixed
number inside instead O(n*log(n)).
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