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https://issues.apache.org/jira/browse/HIVE-11291?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14631675#comment-14631675
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Hari Sankar Sivarama Subramaniyan commented on HIVE-11291:
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[~ashutoshc] The patch looks good to me, +1 pending tests. I believe this idea
has to be incorporated as part of HIVE-11141
Thanks
Hari
> Avoid allocation storm while doing rule matching on operator/expression trees
> -----------------------------------------------------------------------------
>
> Key: HIVE-11291
> URL: https://issues.apache.org/jira/browse/HIVE-11291
> Project: Hive
> Issue Type: Improvement
> Reporter: Ashutosh Chauhan
> Assignee: Ashutosh Chauhan
> Attachments: HIVE-11291.patch
>
>
> RuleRegExMatch repeatedly allocates string while trying to find a matching
> pattern. This results in huge GC churn for large trees.
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