Weihua Hu created FLINK-31842:
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Summary: calculate task executor's utilization only when used
Key: FLINK-31842
URL: https://issues.apache.org/jira/browse/FLINK-31842
Project: Flink
Issue Type: Sub-task
Components: Runtime / Coordination
Reporter: Weihua Hu
Currently DefaultAllocatedSlotPool#getFreeSlotsInformation always calculates
the taskExecutorUtilization. This causes task schedules to be too slow when
there are lots of slots, such as 20000 slots total. But only the
EvenlySpreadOutLocationPreferenceSlotSelectionStrategy uses this utilization.
So I would like to move the calculation of taskExecutorUtilization to usage.
DefaultAllocatedSlotPool provides a function: getTaskExecutorUtilization, and
is only used in EvenlySpreadOutLocationPreferenceSlotSelectionStrategy.
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