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  1. Core Server
  2. SERVER-44898

Lower thread count and iterations of compact.js FSM workload and blacklist from certain suites

    • Type: Icon: Bug Bug
    • Resolution: Fixed
    • Priority: Icon: Major - P3 Major - P3
    • 4.3.3
    • Affects Version/s: None
    • Component/s: None
    • None
    • Fully Compatible
    • ALL
    • Execution Team 2020-01-13
    • 24

      The "compact" commands takes the checkpoint mutex, which blocks on checkpoints. This was added by SERVER-43828, and causes slowness in certain concurrency workloads where the cost of checkpointing is high.

      We should do two things:

      • Lower the thread count and number of iterations of the compact.js and related workloads
      • Blacklist the workload from the especially slow "concurrency_simultaneous_replication_wiredtiger_eviction_debug" and "concurrency_simultaneous_replication_wiredtiger_cursor_sweeps" suites. From what I understand, cursor sweeps block checkpoints, and eviction debug mode makes them slower, so it would be expected for the compact command to take a long time in scenarios.

            Assignee:
            daniel.ernst@mongodb.com Daniel Ernst
            Reporter:
            louis.williams@mongodb.com Louis Williams
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              Created:
              Updated:
              Resolved: