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Posted to issues@spark.apache.org by "Josh Rosen (JIRA)" <ji...@apache.org> on 2015/05/18 04:57:59 UTC

[jira] [Created] (SPARK-7698) Implement buffer pooling / re-use in ExecutorMemoryManager when using HeapAllocator

Josh Rosen created SPARK-7698:
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             Summary: Implement buffer pooling / re-use in ExecutorMemoryManager when using HeapAllocator
                 Key: SPARK-7698
                 URL: https://issues.apache.org/jira/browse/SPARK-7698
             Project: Spark
          Issue Type: New Feature
          Components: Spark Core
            Reporter: Josh Rosen
            Assignee: Josh Rosen


When on-heap memory allocation is used, ExecutorMemoryManager should maintain a cache / pool of buffers for re-use by tasks.  This will significantly improve the performance of the new Tungsten's sort-shuffle for jobs with many short-lived tasks by eliminating a major source of GC.



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