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Posted to issues@impala.apache.org by "Riza Suminto (Jira)" <ji...@apache.org> on 2023/04/24 17:52:00 UTC

[jira] [Created] (IMPALA-12091) Control scan fragment parallelism by its processing cost

Riza Suminto created IMPALA-12091:
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             Summary: Control scan fragment parallelism by its processing cost
                 Key: IMPALA-12091
                 URL: https://issues.apache.org/jira/browse/IMPALA-12091
             Project: IMPALA
          Issue Type: Improvement
          Components: Frontend
    Affects Versions: Impala 4.2.0
            Reporter: Riza Suminto
            Assignee: Riza Suminto


Impala still rely on MT_DOP option to decide parallelism of scan fragment when query runs with COMPUTE_PROCESSING_COST=1. Planner should decide scan parallelism by its processing cost instead of fixed count dictated by MT_DOP.



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