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  1. Core Server
  2. SERVER-16643

extend existing THP warning to THP defrag setting

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    • Type: Icon: Improvement Improvement
    • Resolution: Done
    • Priority: Icon: Major - P3 Major - P3
    • 3.0.0-rc6
    • Affects Version/s: 2.8.0-rc3
    • Component/s: Admin, Performance
    • Labels:
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    • Fully Compatible

      We currently check certain system parameters at start-up including high read-ahead and transparent huge pages.

      It turns out even if THP are disabled (enabled set to [never]) if defrag is "always" then it impacts mongod when Linux defrags the pages. We should extend the check and the warning to /sys/kernel/mm/transparent_hugepage/defrag

            Assignee:
            benety.goh@mongodb.com Benety Goh
            Reporter:
            asya.kamsky@mongodb.com Asya Kamsky
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              Created:
              Updated:
              Resolved: