Disable auto-tuning of WiredTiger eviction threads

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    • Type: Task
    • Resolution: Done
    • Priority: Major - P3
    • 3.2.13, 3.4.3, 3.5.4
    • Affects Version/s: None
    • Component/s: WiredTiger
    • None
    • Fully Compatible
    • v3.2
    • Storage 2017-03-06
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      In WT-2898, we added code to automatically tune the number of eviction worker threads in WiredTiger. That work (a) assumed eviction.threads_max was reasonably large (e.g., 8), and (b) was driven by test workloads where the behavior at startup matches the long-term workload behavior.

      To avoid MongoDB users being adversely affected by that change, we should disable it in 3.2 and 3.4 by changing the default eviction.threads_min=4 – i.e., min threads = max threads = 4.

              Assignee:
              Alexander Gorrod
              Reporter:
              Michael Cahill (Inactive)
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                Created:
                Updated:
                Resolved: