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Posted to issues@spark.apache.org by "Matei Zaharia (JIRA)" <ji...@apache.org> on 2014/08/05 05:04:13 UTC

[jira] [Created] (SPARK-2856) Decrease initial buffer size for Kryo now that SPARK-2543 is in

Matei Zaharia created SPARK-2856:
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             Summary: Decrease initial buffer size for Kryo now that SPARK-2543 is in
                 Key: SPARK-2856
                 URL: https://issues.apache.org/jira/browse/SPARK-2856
             Project: Spark
          Issue Type: Bug
            Reporter: Matei Zaharia


SPARK-2543 allowed us to have a max size for Kryo buffers that's bigger than the initial one, so there's no need to start the initial one at 2 MB. Instead I'd give it support for fractional values and start it as low as 0.1 MB, or even 0.065 (65 KB). It will avoid a lot of unnecessary memory allocation in hash-based shuffle.



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