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  1. Spark
  2. SPARK-31412 New Adaptive Query Execution in Spark SQL
  3. SPARK-29893

Improve the local reader performance by changing the task number from 1 to multi

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    • Type: Sub-task
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 3.0.0
    • Fix Version/s: 3.0.0
    • Component/s: SQL
    • Labels:
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      Description

      The currently local reader read all the partition of map stage only using 1 task, which may cause the performance degradation. This PR will improve the performance by using multi tasks instead of one task.

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            • Assignee:
              Jk_Self Ke Jia
              Reporter:
              Jk_Self Ke Jia
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