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https://issues.apache.org/jira/browse/HIVE-12450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15010089#comment-15010089
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Prasanth Jayachandran commented on HIVE-12450:
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[~sershe] Can you take a look at this patch? Most changes are test + golden
file out.
> OrcFileMergeOperator does not use correct compression buffer size
> -----------------------------------------------------------------
>
> Key: HIVE-12450
> URL: https://issues.apache.org/jira/browse/HIVE-12450
> Project: Hive
> Issue Type: Bug
> Affects Versions: 1.2.0, 1.3.0, 1.2.1, 2.0.0
> Reporter: Prasanth Jayachandran
> Assignee: Prasanth Jayachandran
> Attachments: HIVE-12450.1.patch
>
>
> OrcFileMergeOperator checks for compatibility before merging orc files. This
> compatibility check include checking compression buffer size. But the output
> file that is created does not honor the compression buffer size and always
> defaults to 256KB. This will not be a problem when reading the orc file but
> can create unwanted memory pressure because of wasted space within
> compression buffer.
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