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https://issues.apache.org/jira/browse/HIVE-4518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13869447#comment-13869447
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Lefty Leverenz commented on HIVE-4518:
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Someone already added *hive.counters.group.name* to hive-default.xml.template
with this description:
bq. The name of counter group for internal Hive variables (CREATED_FILE,
FATAL_ERROR, etc.)
So I've added it to the wiki with this merged description:
bq. Counter group name for counters used during query execution. The counter
group is used for internal Hive variables (CREATED_FILE, FATAL_ERROR, and so
on).
See [Configuration
Properties|https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties]
-- it's listed in the Query Execution section right after *hive.task.progress*.
> Counter Strike: Operation Operator
> ----------------------------------
>
> Key: HIVE-4518
> URL: https://issues.apache.org/jira/browse/HIVE-4518
> Project: Hive
> Issue Type: Improvement
> Reporter: Gunther Hagleitner
> Assignee: Gunther Hagleitner
> Fix For: 0.13.0
>
> Attachments: HIVE-4518.1.patch, HIVE-4518.10.patch,
> HIVE-4518.11.patch, HIVE-4518.2.patch, HIVE-4518.3.patch, HIVE-4518.4.patch,
> HIVE-4518.5.patch, HIVE-4518.6.patch.txt, HIVE-4518.7.patch,
> HIVE-4518.8.patch, HIVE-4518.9.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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