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From "Szehon Ho (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-12987) Add metrics for HS2 active users and SQL operations
Date Wed, 03 Feb 2016 21:34:39 GMT

    [ https://issues.apache.org/jira/browse/HIVE-12987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15131178#comment-15131178
] 

Szehon Ho commented on HIVE-12987:
----------------------------------

Thanks for the patch.. I had some comments.

1.  The overriding of the metrics-prefix strings seems confusing, can't we just add some new
constants/prefixes in MetricsConstants and have Sqloperation increment/decrement those explicitly
as part of overriding the setMetrics method?  And moreover with this code, I think we may
be not getting some old metrics in case of SQLOperation, wouldn't it stop increment/decrement
the total count?
2.  The increment/decrementUserQuery methods also seem a bit complicated.  Why do we need
extra map in SQLOperation?  I think the counter-map already in CodahaleMetrics should take
care of all the stuff the new map does?

Those were my two main concerns, otherwise change makes sense.  Also i am OOO at the moment,
you can also ping someone else if I'm a bit slow to respond.  Thanks

> Add metrics for HS2 active users and SQL operations
> ---------------------------------------------------
>
>                 Key: HIVE-12987
>                 URL: https://issues.apache.org/jira/browse/HIVE-12987
>             Project: Hive
>          Issue Type: Task
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>         Attachments: HIVE-12987.1.patch, HIVE-12987.2.patch
>
>
> HIVE-12271 added metrics for all HS2 operations. Sometimes, users are also interested
in metrics just for SQL operations.
> It is useful to track active user count as well.



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