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From "Adam Kramer (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-478) Surface "processor time" for queries
Date Mon, 11 May 2009 19:23:45 GMT
Surface "processor time" for queries

                 Key: HIVE-478
                 URL: https://issues.apache.org/jira/browse/HIVE-478
             Project: Hadoop Hive
          Issue Type: Wish
          Components: Logging, Query Processor
            Reporter: Adam Kramer

We currently list real-time metrics of how long queries take--"finished in: 1min 13sec" appears
on the job tracker. However, this is affected by a lot more than just the quality or implementation
of the query. For example, number of mappers used varies a lot when you use subqueries versus
single-query aggregation, as does the amount of work necessary.

For implementation comparisons (e.g., "should I use this version of the query or that one"),
ti would be great to know the processor time used instead of the real time used...both in
terms of "mapper cpu seconds" and "reducer cpu seconds."

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