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Posted to dev@hive.apache.org by "Namit Jain (JIRA)" <ji...@apache.org> on 2009/02/16 01:32:59 UTC
[jira] Created: (HIVE-291) [Hive] map-side aggregation should be
automatically disabled at run-time if it is not turning out to be useful
[Hive] map-side aggregation should be automatically disabled at run-time if it is not turning out to be useful
--------------------------------------------------------------------------------------------------------------
Key: HIVE-291
URL: https://issues.apache.org/jira/browse/HIVE-291
Project: Hadoop Hive
Issue Type: Bug
Components: Query Processor
Reporter: Namit Jain
Assignee: Namit Jain
Map-side aggregation should be automatically disabled at run-time if it is not turning out to be useful.
If map-side aggregation is not reducing the number of output rows, it is a drain on the mapper, since it is consuming memory and performing unnecessary hash lookups
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[jira] Updated: (HIVE-291) [Hive] map-side aggregation should be
automatically disabled at run-time if it is not turning out to be useful
Posted by "Namit Jain (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HIVE-291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Namit Jain updated HIVE-291:
----------------------------
Status: Open (was: Patch Available)
> [Hive] map-side aggregation should be automatically disabled at run-time if it is not turning out to be useful
> --------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-291
> URL: https://issues.apache.org/jira/browse/HIVE-291
> Project: Hadoop Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Namit Jain
> Assignee: Namit Jain
> Attachments: 291.1.txt
>
>
> Map-side aggregation should be automatically disabled at run-time if it is not turning out to be useful.
> If map-side aggregation is not reducing the number of output rows, it is a drain on the mapper, since it is consuming memory and performing unnecessary hash lookups
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You can reply to this email to add a comment to the issue online.
[jira] Resolved: (HIVE-291) [Hive] map-side aggregation should be
automatically disabled at run-time if it is not turning out to be useful
Posted by "Namit Jain (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HIVE-291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Namit Jain resolved HIVE-291.
-----------------------------
Resolution: Duplicate
duplicate of 223
> [Hive] map-side aggregation should be automatically disabled at run-time if it is not turning out to be useful
> --------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-291
> URL: https://issues.apache.org/jira/browse/HIVE-291
> Project: Hadoop Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Namit Jain
> Assignee: Namit Jain
> Attachments: 291.1.txt
>
>
> Map-side aggregation should be automatically disabled at run-time if it is not turning out to be useful.
> If map-side aggregation is not reducing the number of output rows, it is a drain on the mapper, since it is consuming memory and performing unnecessary hash lookups
--
This message is automatically generated by JIRA.
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You can reply to this email to add a comment to the issue online.
[jira] Updated: (HIVE-291) [Hive] map-side aggregation should be
automatically disabled at run-time if it is not turning out to be useful
Posted by "Namit Jain (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HIVE-291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Namit Jain updated HIVE-291:
----------------------------
Attachment: 291.1.txt
> [Hive] map-side aggregation should be automatically disabled at run-time if it is not turning out to be useful
> --------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-291
> URL: https://issues.apache.org/jira/browse/HIVE-291
> Project: Hadoop Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Namit Jain
> Assignee: Namit Jain
> Attachments: 291.1.txt
>
>
> Map-side aggregation should be automatically disabled at run-time if it is not turning out to be useful.
> If map-side aggregation is not reducing the number of output rows, it is a drain on the mapper, since it is consuming memory and performing unnecessary hash lookups
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
[jira] Updated: (HIVE-291) [Hive] map-side aggregation should be
automatically disabled at run-time if it is not turning out to be useful
Posted by "Namit Jain (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HIVE-291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Namit Jain updated HIVE-291:
----------------------------
Status: Patch Available (was: Open)
have not run the patch on the main cluster yet - dont want to bring the cluster down in case of a bug on a long weekend.
will merge only after testing with large data
> [Hive] map-side aggregation should be automatically disabled at run-time if it is not turning out to be useful
> --------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-291
> URL: https://issues.apache.org/jira/browse/HIVE-291
> Project: Hadoop Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Namit Jain
> Assignee: Namit Jain
> Attachments: 291.1.txt
>
>
> Map-side aggregation should be automatically disabled at run-time if it is not turning out to be useful.
> If map-side aggregation is not reducing the number of output rows, it is a drain on the mapper, since it is consuming memory and performing unnecessary hash lookups
--
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You can reply to this email to add a comment to the issue online.
[jira] Commented: (HIVE-291) [Hive] map-side aggregation should be
automatically disabled at run-time if it is not turning out to be useful
Posted by "Namit Jain (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HIVE-291?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12674893#action_12674893 ]
Namit Jain commented on HIVE-291:
---------------------------------
tested one big job for correctness
> [Hive] map-side aggregation should be automatically disabled at run-time if it is not turning out to be useful
> --------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-291
> URL: https://issues.apache.org/jira/browse/HIVE-291
> Project: Hadoop Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Namit Jain
> Assignee: Namit Jain
> Attachments: 291.1.txt
>
>
> Map-side aggregation should be automatically disabled at run-time if it is not turning out to be useful.
> If map-side aggregation is not reducing the number of output rows, it is a drain on the mapper, since it is consuming memory and performing unnecessary hash lookups
--
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You can reply to this email to add a comment to the issue online.