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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-3874) flattening large JSON objects consumes too much direct memory
Date Mon, 05 Oct 2015 19:36:27 GMT

    [ https://issues.apache.org/jira/browse/DRILL-3874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14943898#comment-14943898
] 

ASF GitHub Bot commented on DRILL-3874:
---------------------------------------

Github user cwestin closed the pull request at:

    https://github.com/apache/drill/pull/181


> flattening large JSON objects consumes too much direct memory
> -------------------------------------------------------------
>
>                 Key: DRILL-3874
>                 URL: https://issues.apache.org/jira/browse/DRILL-3874
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Flow
>    Affects Versions: 1.1.0
>            Reporter: Chris Westin
>            Assignee: Chris Westin
>
> A JSON record has a field whose value is an array with 20,000 elements; the record's
size is 4MB. A select is used to flatten this. The query profile reports that the peak memory
utilization was 8GB, most of it used by the flatten. 



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