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  1. IMPALA
  2. IMPALA-3902 Multi-threaded query execution
  3. IMPALA-8999

Parallelise all plans, including UNION, when mt_dop > 1

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Details

    • Sub-task
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • None
    • Impala 3.4.0
    • Distributed Exec
    • None
    • ghx-label-10

    Description

      We should do another pass over the scheduler to make sure that the logic makes sense for mt_dop.

      There are some comments in scheduler.cc, e.g. talking about optimisations for UNION.

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            tarmstrong Tim Armstrong
            tarmstrong Tim Armstrong
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