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Posted to issues@arrow.apache.org by "Pindikura Ravindra (JIRA)" <ji...@apache.org> on 2019/06/03 05:50:00 UTC

[jira] [Updated] (ARROW-5482) [Java] reduce heap footprint of ValueVectors

     [ https://issues.apache.org/jira/browse/ARROW-5482?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Pindikura Ravindra updated ARROW-5482:
--------------------------------------
    Summary: [Java] reduce heap footprint of ValueVectors  (was: reduce heap footprint of ValueVectors)

> [Java] reduce heap footprint of ValueVectors
> --------------------------------------------
>
>                 Key: ARROW-5482
>                 URL: https://issues.apache.org/jira/browse/ARROW-5482
>             Project: Apache Arrow
>          Issue Type: Task
>          Components: Java
>            Reporter: Pindikura Ravindra
>            Assignee: Pindikura Ravindra
>            Priority: Major
>
> In some scenarios, we hold lots of value vectors in memory eg. during join, aggregation. The heap analysis shows that the costs are as follows for a simple IntVector (used VisualVM on mac) :
>  
> IntVector : 80 bytes
> vector.types.pojo.FieldType : 41 bytes
> vector.types.pojo.Field : 40 bytes
> IntReaderImpl : 28 bytes
>  
> I'll use this Jira to track ways to reduce the heap usage.
>  



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