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https://issues.apache.org/jira/browse/DRILL-5601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16086612#comment-16086612
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ASF GitHub Bot commented on DRILL-5601:
---------------------------------------

Github user Ben-Zvi commented on a diff in the pull request:

    https://github.com/apache/drill/pull/860#discussion_r127351398
  
    --- Diff: exec/java-exec/src/main/resources/drill-module.conf ---
    @@ -239,9 +239,7 @@ drill.exec: {
         external: {
           // Drill uses the managed External Sort Batch by default.
           // Set this to true to use the legacy, unmanaged version.
    -      // Disabled in the intial commit, to be enabled after
    -      // tests are committed.
    -      disable_managed: true,
    +      disable_managed: false,
    --- End diff --
    
    Back to "true" ....



> 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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