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Date: Fri, 21 Jul 2017 23:33:00 +0000 (UTC)
From: "ASF GitHub Bot (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (DRILL-5601) Rollup of External Sort memory
 management fixes
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archived-at: Fri, 21 Jul 2017 23:33:04 -0000


    [ https://issues.apache.org/jira/browse/DRILL-5601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16096995#comment-16096995 ] 

ASF GitHub Bot commented on DRILL-5601:
---------------------------------------

Github user paul-rogers commented on the issue:

    https://github.com/apache/drill/pull/860
  
    Fixed; slightly different than suggested, but similar. Didn't want to change this code too terribly much, so did the minimum change that would work.


> Rollup of External Sort memory management fixes
> -----------------------------------------------
>
>                 Key: DRILL-5601
>                 URL: https://issues.apache.org/jira/browse/DRILL-5601
>             Project: Apache Drill
>          Issue Type: Task
>    Affects Versions: 1.11.0
>            Reporter: Paul Rogers
>            Assignee: Paul Rogers
>             Fix For: 1.12.0
>
>
> Rollup of a set of specific JIRA entries that all relate to the very difficult problem of managing memory within Drill in order for the external sort to stay within a memory budget. In general, the fixes relate to better estimating memory used by the three ways that Drill allocates vector memory (see DRILL-5522) and to predicting the size of vectors that the sort will create, to avoid repeated realloc-copy cycles (see DRILL-5594).


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