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  1. Core Server
  2. SERVER-16643

extend existing THP warning to THP defrag setting

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Details

    • Improvement
    • Status: Closed
    • Major - P3
    • Resolution: Done
    • 2.8.0-rc3
    • 3.0.0-rc6
    • Admin, Performance
    • None
    • 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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        Issue Links

          depends on

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-13482 mongod could warn user if OS transparent huge pages feature is on

          • Major - P3 - Major loss of function.
          • Closed
          is related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-16269 WiredTiger blocks queries and updates for many seconds.

          • Major - P3 - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-17522 THP startup warnings can become stale

          • Major - P3 - Major loss of function.
          • Closed
          related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-17036 db.runCommand({startupWarnings:1}) includes spurious line

          • Major - P3 - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. SERVER-27588 Warning to disable defrag of transparent_hugepages when thp is disabled

          • Minor - P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed
          links to

          Web Link MongoDB Manual - Production Notes

          Activity

            People

              benety.goh@mongodb.com Benety Goh
              asya.kamsky@mongodb.com Asya Kamsky
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              Dates

                Created:
                Updated:
                Resolved: