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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