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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-5457) Support Spill to Disk for the Hash Aggregate Operator
Date Tue, 23 May 2017 20:53:04 GMT

    [ https://issues.apache.org/jira/browse/DRILL-5457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16021838#comment-16021838
] 

ASF GitHub Bot commented on DRILL-5457:
---------------------------------------

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

    https://github.com/apache/drill/pull/822#discussion_r118103592
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/ExecConstants.java ---
    @@ -86,6 +92,19 @@
     
       BooleanValidator EXTERNAL_SORT_DISABLE_MANAGED_OPTION = new BooleanValidator("exec.sort.disable_managed",
false);
     
    +  // Hash Aggregate Options
    +
    +  String HASHAGG_NUM_PARTITIONS_KEY = "drill.exec.hashagg.num_partitions";
    --- End diff --
    
    Changed all three to have both the config option ("drill.exec.hashagg....") and its matching
_KEY (same, sans the prefix "drill.") which is only used to create the validator.
    Hence all three can be set either in the config file, or for the session: 
    Number of partitions, max memory, and minimum batches per partitions.



> Support Spill to Disk for the Hash Aggregate Operator
> -----------------------------------------------------
>
>                 Key: DRILL-5457
>                 URL: https://issues.apache.org/jira/browse/DRILL-5457
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Execution - Relational Operators
>    Affects Versions: 1.10.0
>            Reporter: Boaz Ben-Zvi
>            Assignee: Boaz Ben-Zvi
>             Fix For: 1.11.0
>
>
> Support gradual spilling memory to disk as the available memory gets too small to allow
in memory work for the Hash Aggregate Operator.



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