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From "Gunther Hagleitner (JIRA)" <>
Subject [jira] [Updated] (HIVE-4518) Counter Strike: Operation Operator
Date Tue, 07 May 2013 22:55:16 GMT


Gunther Hagleitner updated HIVE-4518:

    Attachment: HIVE-4518.1.patch
> Counter Strike: Operation Operator
> ----------------------------------
>                 Key: HIVE-4518
>                 URL:
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Gunther Hagleitner
>            Assignee: Gunther Hagleitner
>         Attachments: HIVE-4518.1.patch
> Queries of the form:
> from foo
> insert overwrite table bar partition (p) select ...
> insert overwrite table bar partition (p) select ...
> insert overwrite table bar partition (p) select ...
> Generate a huge amount of counters. The reason is that task.progress is turned on for
dynamic partitioning queries.
> The counters not only make queries slower than necessary (up to 50%) you will also eventually
run out. That's because we're wrapping them in enum values to comply with hadoop 0.17.
> The real reason we turn task.progress on is that we need CREATED_FILES and FATAL counters
to ensure dynamic partitioning queries don't go haywire.
> The counters have counter-intuitive names like C1 through C1000 and don't seem really
useful by themselves.
> With hadoop 20+ you don't need to wrap the counters anymore, each operator can simply
create and increment counters. That should simplify the code a lot.

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