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Posted to issues@flink.apache.org by "Weijie Guo (Jira)" <ji...@apache.org> on 2023/04/11 05:47:00 UTC

[jira] [Created] (FLINK-31764) Get rid of numberOfRequestedOverdraftMemorySegments in LocalBufferPool

Weijie Guo created FLINK-31764:
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             Summary: Get rid of numberOfRequestedOverdraftMemorySegments in LocalBufferPool
                 Key: FLINK-31764
                 URL: https://issues.apache.org/jira/browse/FLINK-31764
             Project: Flink
          Issue Type: Improvement
          Components: Runtime / Network
    Affects Versions: 1.18.0
            Reporter: Weijie Guo
            Assignee: Weijie Guo


We can changes the definition of overdraft buffer from static to dynamic: 
 * When _numberOfRequestedMemorySegments <= poolSize,_ all buffers are ordinary buffer
 * When _numberOfRequestedMemorySegments > poolSize,_ the `{_}ordinary buffer size = poolSize`{_}, and `{_}the overdraft buffer size = numberOfRequestedMemorySegments - poolSize`{_}

This allows us to remove {{{}numberOfRequestedOverdraftMemorySegments{}}}, which helps us simplify logic and maintain consistency.



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