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Posted to issues@impala.apache.org by "Tim Armstrong (JIRA)" <ji...@apache.org> on 2017/09/05 22:02:00 UTC

[jira] [Created] (IMPALA-5895) Simplify and document memory management of RuntimeProfile Counters

Tim Armstrong created IMPALA-5895:
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             Summary: Simplify and document memory management of RuntimeProfile Counters
                 Key: IMPALA-5895
                 URL: https://issues.apache.org/jira/browse/IMPALA-5895
             Project: IMPALA
          Issue Type: Improvement
          Components: Backend
    Affects Versions: Impala 2.10.0
            Reporter: Tim Armstrong
            Assignee: Tim Armstrong


It's very unclear what requirements there are around object lifetimes for RuntimeProfile objects and the Counter objects that live in ObjectPools. See IMPALA-5878 for a case where it's very hard to reason about correctness of the memory management.

We should document the requirements and also consider simplifying the ownership model. E.g. having each RuntimeProfile own all of its counters via unique_ptrs. 



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