[jira] [Created] (IMPALA-8126) Move per-host resource utilization counters to per-host profiles in coordinator

["Lars Volker (JIRA)" <ji...@apache.org>]

Lars Volker created IMPALA-8126:
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             Summary: Move per-host resource utilization counters to per-host profiles in coordinator
                 Key: IMPALA-8126
                 URL: https://issues.apache.org/jira/browse/IMPALA-8126
             Project: IMPALA
          Issue Type: Bug
          Components: Backend
    Affects Versions: Impala 3.2.0
            Reporter: Lars Volker


Once IMPALA-7694 gets in we should move the per-host resource utilization counters in {{Coordinator::ComputeQuerySummary()}} to the host profiles in {{Coordinator::BackendState}}.

[~tarmstrong] pointed out [here|https://gerrit.cloudera.org/#/c/12069/13/be/src/runtime/coordinator.cc@789]:

{quote}
We could also simplify BackendState::ComputeResourceUtilization() to just use the per-backend counters instead of iterating over fragments.

I think there may be some compatibility concerns about removing these - existence of the counters isn't contractual but we don't want to break useful tools if avoidable.

For example, I confirmed that Cloudera Manager actually does parse the existing strings (which is a little sad, but understandable given the lack of other counters).
{quote}



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