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Posted to issues@hive.apache.org by "Tao Li (JIRA)" <ji...@apache.org> on 2017/01/25 00:00:30 UTC

[jira] [Commented] (HIVE-15717) Class "org.apache.hive.beeline.Rows.Row" constructor is CPU consuming due to exception handling

    [ https://issues.apache.org/jira/browse/HIVE-15717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15836884#comment-15836884 ] 

Tao Li commented on HIVE-15717:
-------------------------------

I have attached the screen shot of the CPU profile. Instantiating the exception instances are CPU intensive which causes extra latency when beeline is used to display results (up to tens of seconds when displaying 1 million rows). According the CPU profile, this exception related cost is roughly half of total CPU cost from beeline, so reducing this cost should significantly improve the user experience.

[~thejas] Please let me know your thoughts.

> Class "org.apache.hive.beeline.Rows.Row" constructor is CPU consuming due to exception handling
> -----------------------------------------------------------------------------------------------
>
>                 Key: HIVE-15717
>                 URL: https://issues.apache.org/jira/browse/HIVE-15717
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Tao Li
>            Assignee: Tao Li
>         Attachments: Screen Shot 2017-01-24 at 3.15.14 PM.png
>
>
> The exception handling from the 3 methods calls (rowDeleted, rowDeleted and rowUpdated). The implementation of these methods in org.apache.hive.jdbc.HiveBaseResultSet class is just throwing SQLException("Method not supported”), i.e. no real implementations.



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