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Posted to issues@drill.apache.org by "Jacques Nadeau (JIRA)" <ji...@apache.org> on 2015/05/02 19:25:06 UTC

[jira] [Updated] (DRILL-2940) Large allocations are not released until GC kicks in

     [ https://issues.apache.org/jira/browse/DRILL-2940?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jacques Nadeau updated DRILL-2940:
----------------------------------
    Fix Version/s: 1.0.0

> Large allocations are not released until GC kicks in
> ----------------------------------------------------
>
>                 Key: DRILL-2940
>                 URL: https://issues.apache.org/jira/browse/DRILL-2940
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Flow
>            Reporter: Jacques Nadeau
>            Assignee: Steven Phillips
>             Fix For: 1.0.0
>
>         Attachments: DRILL-2940.patch
>
>
> If you allocate over the chunk size (16mb), we are currently relying on GC to release those buffers. This is problematic since direct memory pressure doesn't cause gc.  In some situations with fast memory turnover, this means we run out of memory incorrectly.



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