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Posted to issues@hive.apache.org by "Wei Zheng (JIRA)" <ji...@apache.org> on 2015/09/02 01:09:45 UTC

[jira] [Resolved] (HIVE-11566) Hybrid grace hash join should only allocate write buffer for a hash partition when first write happens

     [ https://issues.apache.org/jira/browse/HIVE-11566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wei Zheng resolved HIVE-11566.
------------------------------
    Resolution: Duplicate

HIVE-11587 contains this improvement.

> Hybrid grace hash join should only allocate write buffer for a hash partition when first write happens
> ------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-11566
>                 URL: https://issues.apache.org/jira/browse/HIVE-11566
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>    Affects Versions: 1.2.0
>            Reporter: Wei Zheng
>            Assignee: Wei Zheng
>
> Currently it's allocating one write buffer for a number of hash partitions up front, which can cause GC pause.
> It's better to do the write buffer allocation on demand.



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