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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-5601) Rollup of External Sort memory management fixes
Date Thu, 13 Jul 2017 22:21:00 GMT

    [ https://issues.apache.org/jira/browse/DRILL-5601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16086500#comment-16086500
] 

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_r124909795
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/xsort/managed/SorterWrapper.java
---
    @@ -83,10 +83,9 @@ private SingleBatchSorter newSorter(VectorAccessible batch) {
         ClassGenerator<SingleBatchSorter> g = cg.getRoot();
         cg.plainJavaCapable(true);
         // Uncomment out this line to debug the generated code.
    -  cg.saveCodeForDebugging(true);
    +    cg.saveCodeForDebugging(true);
    --- End diff --
    
    comment out  ..


> 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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