[jira] [Created] (IMPALA-7433) Reduce volume of -v=1 logs on executors

["Tim Armstrong (JIRA)" <ji...@apache.org>]

Tim Armstrong created IMPALA-7433:
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             Summary: Reduce volume of -v=1 logs on executors
                 Key: IMPALA-7433
                 URL: https://issues.apache.org/jira/browse/IMPALA-7433
             Project: IMPALA
          Issue Type: Bug
          Components: Backend
    Affects Versions: Impala 3.1.0
            Reporter: Tim Armstrong
            Assignee: Tim Armstrong


We're currently logging a lot of things per query on executors that is redundant or unnecessary, e.g.:
* ExecQueryFInstances() and StartQueryFInstances() are both logged but are redundant
* Some random low-level details are logged, e.g. "Max row batch queue size for scan node '0' in fragment instance '940cdcd50664a51:368ab6690000001e': 180"

I think we should cut back the logging at -v=1, which is the default log level most deployments run at:
* Do log key finstance lifecycle events that are useful to understand what finstances are running and if/when failures occurred
* Don't log things redundantly
* Don't log lower-level events that occur in the normal flow of query execution (e.g. memory limits, queue lengths). These things have limited diagnostic value and should be in the profile, if anywhere



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