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Posted to issues@impala.apache.org by "Tim Armstrong (JIRA)" <ji...@apache.org> on 2019/02/19 22:56:00 UTC

[jira] [Created] (IMPALA-8223) Remove mem-pool.total-bytes and hash-table.total-bytes metrics

Tim Armstrong created IMPALA-8223:
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             Summary: Remove mem-pool.total-bytes and hash-table.total-bytes metrics
                 Key: IMPALA-8223
                 URL: https://issues.apache.org/jira/browse/IMPALA-8223
             Project: IMPALA
          Issue Type: Improvement
          Components: Backend
            Reporter: Tim Armstrong
            Assignee: Tim Armstrong


I think we should remove these metrics - I'm not aware of a use case for them and I haven't seen them be of use since I've been working on Impala's memory management. Generally memory consumption is only interesting when broken down by query.

The hash-table metric is also wrong since it doesn't include the actual hash table buckets. 

The description of the mem-pool metric is totally wrong - "The current size of the memory pool shared by all queries".



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