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  1. Core Server
  2. SERVER-61948

Improve SBE $group pushdown scalability in terms of number of accumulator

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    • Type: Icon: Task Task
    • Resolution: Gone away
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: None
    • Component/s: Query Execution
    • Query Execution
    • QE 2022-09-19, QE 2022-10-03, QE 2022-10-17, QE 2022-10-31, QE 2022-11-14, QE 2022-11-28, QE 2022-12-12, QE 2022-12-26, QE 2023-01-09
    • 10

      As it can be seen in https://docs.google.com/spreadsheets/d/19iSNSc_lNlzWRe_0_R937E7af2ekjXPZur0sog5Fj4U/edit#gid=2008213546 "nAcc scalability trend" sheet, as the number of accumulators increases, SBE $group perf gain decreases dramatically.

      Investigate whether this issue is legit and if so, improve the performance.

        1. Screen Shot 2021-12-07 at 12.40.33 PM.png
          Screen Shot 2021-12-07 at 12.40.33 PM.png
          37 kB
        2. Xnip2022-01-07_10-08-34.jpg
          Xnip2022-01-07_10-08-34.jpg
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            Assignee:
            backlog-query-execution [DO NOT USE] Backlog - Query Execution
            Reporter:
            yoonsoo.kim@mongodb.com Yoon Soo Kim
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            Watchers:
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              Created:
              Updated:
              Resolved: