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  1. Core Server
  2. SERVER-75098

Investigate reducing cost of cached plan preparation

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    • Icon: Task Task
    • Resolution: Done
    • Icon: Major - P3 Major - P3
    • 8.0.0-rc0
    • None
    • None
    • QE 2023-05-15, QE 2023-05-29, QE 2023-06-12, QE 2023-06-26, QE 2023-07-10, QE 2023-07-24, QE 2023-08-07, QE 2023-08-21, QE 2023-09-04, QE 2023-09-18, QE 2023-10-02, QE 2023-10-16, QE 2023-10-30, QE 2023-11-13, QE 2023-11-27, QE 2023-12-11, QE 2023-12-25, QE 2024-01-08, QE 2024-01-22, QE 2024-02-05, QE 2024-02-19

    Description

      Currently preparing cached plans involve:

      • cloning of PlanStage tree, including all their arguments, EExpressions, etc.
      • compiling EExpressions
      • preparing and linking slots accessors.

      Investigate if is is possible to reduce that cost, for example by sharing immutable structures (like EExpressions, slot vectors, etc) and compilation results. And if so, estimate the possible performance impact.

      Attachments

        1. patch_perf.svg
          664 kB
        2. sbe_perf.svg
          694 kB

        Activity

          People

            anna.wawrzyniak@mongodb.com Anna Wawrzyniak
            anna.wawrzyniak@mongodb.com Anna Wawrzyniak
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            Dates

              Created:
              Updated:
              Resolved: