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Posted to issues@spark.apache.org by "Reynold Xin (JIRA)" <ji...@apache.org> on 2014/09/12 07:22:33 UTC

[jira] [Created] (SPARK-3503) Disable thread local cache in PooledByteBufAllocator

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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