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https://issues.apache.org/jira/browse/HIVE-1511?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13741101#comment-13741101
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Edward Capriolo commented on HIVE-1511:
---------------------------------------
Here is the little funny corner case of this ticket. By adding Kryo to the
distributed cache needed to launch jobs we ARE slowing down queries. The better
serialization helps more for the very large queries, but for the standard case
we may be adding time.
> Hive plan serialization is slow
> -------------------------------
>
> Key: HIVE-1511
> URL: https://issues.apache.org/jira/browse/HIVE-1511
> Project: Hive
> Issue Type: Improvement
> Affects Versions: 0.7.0
> Reporter: Ning Zhang
> Assignee: Mohammad Kamrul Islam
> Attachments: HIVE-1511.patch, HIVE-1511-wip2.patch,
> HIVE-1511-wip3.patch, HIVE-1511-wip.patch
>
>
> As reported by Edward Capriolo:
> For reference I did this as a test case....
> SELECT * FROM src where
> key=0 OR key=0 OR key=0 OR key=0 OR key=0 OR key=0 OR key=0 OR key=0
> OR key=0 OR key=0 OR key=0 OR
> key=0 OR key=0 OR key=0 OR key=0 OR key=0 OR key=0 OR key=0 OR key=0
> OR key=0 OR key=0 OR key=0 OR
> ...(100 more of these)
> No OOM but I gave up after the test case did not go anywhere for about
> 2 minutes.
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