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[jira] [Created] (FLINK-10339) SpillReadBufferPool cannot use off-heap memory


zhijiang created FLINK-10339:
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             Summary: SpillReadBufferPool cannot use off-heap memory
                 Key: FLINK-10339
                 URL: https://issues.apache.org/jira/browse/FLINK-10339
             Project: Flink
          Issue Type: Improvement
          Components: Network
    Affects Versions: 1.6.0, 1.5.3, 1.5.2, 1.5.1, 1.5.0, 1.7.0
            Reporter: zhijiang
            Assignee: zhijiang


Currently, the {{NetworkBufferPool}} always uses off-heap memory to reduce memory copy from flink {{Buffer}} to netty internal {{ByteBuf}} during transporting on sender side.

 

But for {{SpillReadBufferPool}} in {{SpilledSubpartitionView}}, it still uses heap memory for caching. We can make it as off-heap by default similar with {{NetworkBufferPool}} or decide the type by the current parameter {{taskmanager.memory.off-heap.}}



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