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Posted to dev@flink.apache.org by "Maximilian Michels (Jira)" <ji...@apache.org> on 2023/02/06 15:20:00 UTC

[jira] [Created] (FLINK-30931) Adaptive scheduler wastes slots for multiple slot sharing groups with different max parallelism

Maximilian Michels created FLINK-30931:
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             Summary: Adaptive scheduler wastes slots for multiple slot sharing groups with different max parallelism
                 Key: FLINK-30931
                 URL: https://issues.apache.org/jira/browse/FLINK-30931
             Project: Flink
          Issue Type: Bug
            Reporter: Maximilian Michels
             Fix For: 1.17.0


The adaptive scheduler assumes all slot sharing groups have the same maximum parallelism which can yield to allocating too many slots for smaller slot sharing groups.

See https://github.com/apache/flink/blob/2ae5df278958073fee63b2bf824a53a28a21701b/flink-runtime/src/main/java/org/apache/flink/runtime/scheduler/adaptive/allocator/SlotSharingSlotAllocator.java#L97



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