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https://issues.apache.org/jira/browse/HIVE-24688?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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László Bodor resolved HIVE-24688.
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Resolution: Invalid
> Optimise ObjectInspectorUtils.copyToStandardObject
> --------------------------------------------------
>
> Key: HIVE-24688
> URL: https://issues.apache.org/jira/browse/HIVE-24688
> Project: Hive
> Issue Type: Improvement
> Reporter: László Bodor
> Assignee: László Bodor
> Priority: Major
> Attachments: Screen Shot 2021-01-27 at 9.52.32 AM.png
>
>
> It's not necessarily copyToStandardObject which should be optimized, but we
> need to consider some optimization on the attached codepath.
> In a customer case, 3 reducer tasks run forever (handling skewed keys) and
> most of the time is spent on this code path, utilizing GC heavily. At the
> moment I'm open to any kind of optimization:
> -1. do we need to copy Text? cannot we get a reference back?- unfortunately,
> we should copy as we reuse original Writable (Text) object in RowContainer
> 2. Maintain a writable cache with keys as Writable.hashCode from RowContainer
> !Screen Shot 2021-01-27 at 9.52.32 AM.png|width=652,height=280!
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