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  1. Core Server
  2. SERVER-16643

extend existing THP warning to THP defrag setting

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: 2.8.0-rc3
    • Fix Version/s: 3.0.0-rc6
    • Component/s: Admin, Performance
    • Labels:
      None
    • Backwards Compatibility:
      Fully Compatible

      Description

      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

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              Assignee:
              benety.goh Benety Goh
              Reporter:
              asya Asya Kamsky
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                Updated:
                Resolved: