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Posted to issues@drill.apache.org by "Chris Westin (JIRA)" <ji...@apache.org> on 2015/10/01 00:49:04 UTC

[jira] [Updated] (DRILL-3874) flattening large JSON objects consumes too much direct memory

     [ https://issues.apache.org/jira/browse/DRILL-3874?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chris Westin updated DRILL-3874:
--------------------------------
    Component/s:     (was: Execution - Data Types)
                 Execution - Flow

> 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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