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  1. Core Server
  2. SERVER-63365

Defragmentation action objects are unnecessarily copied while processed by the Balancer

    • Type: Icon: Bug Bug
    • Resolution: Fixed
    • Priority: Icon: Major - P3 Major - P3
    • 5.3.0
    • Affects Version/s: None
    • Component/s: None
    • Labels:
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    • Fully Compatible
    • ALL
    • Sharding EMEA 2022-02-21

      The logic implemented by the balancer to retrieve, submit and acknowledge defragmentation commands from the policy involves multiple object copies (1, 2) that could be replaced with {{std::move()}}s.

      The case of SplitInfo is particularly problematic, as it might involve the copy of a std::vector<BSONObjs> containing thousands of elements.

            Assignee:
            paolo.polato@mongodb.com Paolo Polato
            Reporter:
            paolo.polato@mongodb.com Paolo Polato
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              Created:
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