Reynold Xin created SPARK-3503:
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Summary: Disable thread local cache in PooledByteBufAllocator
Key: SPARK-3503
URL: https://issues.apache.org/jira/browse/SPARK-3503
Project: Spark
Issue Type: Sub-task
Components: Shuffle
Reporter: Reynold Xin
Assignee: Reynold Xin
Feedback from Norman.
Thread-local caches should be disabled because the ByteBufs are allocated by
the event loop thread, but released by the executor thread rather than the
event loop thread. Those thread-local caches actually delay the recycling of
buffers, leading to larger memory usage.
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