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Posted to issues@spark.apache.org by "Reynold Xin (JIRA)" <ji...@apache.org> on 2014/08/05 07:50:12 UTC

[jira] [Updated] (SPARK-2856) Decrease initial buffer size for Kryo to 64KB

     [ https://issues.apache.org/jira/browse/SPARK-2856?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Reynold Xin updated SPARK-2856:
-------------------------------

    Summary: Decrease initial buffer size for Kryo to 64KB  (was: Decrease initial buffer size for Kryo now that SPARK-2543 is in)

> Decrease initial buffer size for Kryo to 64KB
> ---------------------------------------------
>
>                 Key: SPARK-2856
>                 URL: https://issues.apache.org/jira/browse/SPARK-2856
>             Project: Spark
>          Issue Type: Bug
>            Reporter: Matei Zaharia
>            Assignee: Reynold Xin
>
> 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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