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  1. Core Server
  2. SERVER-21691

Insert stalls during dirty writeback

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Details

    • Bug
    • Status: Closed
    • Blocker - P1
    • Resolution: Done
    • 3.2.0-rc4
    • 3.2.0-rc5
    • WiredTiger
    • Fully Compatible
    • ALL
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      Standalone mongodb instance, 24CPU, 32GB RAM
      benchRun 32 false true 100000
      (see attached script)

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      Standalone mongodb instance, 24CPU, 32GB RAM benchRun 32 false true 100000 (see attached script)

    Description

      With the resolution of SERVER-21652, things are definitely much improved. However, I still see some heavy stalls during what appears to be dirty writeback. Maybe checkpoints, but not time-aligned as I'd expect?

      Attachments

        1. benchRun
          2 kB
        2. metrics.2015-11-30T14-44-15Z-00000
          120 kB
        3. stalls.png
          stalls.png
          154 kB
        4. stalls.png
          stalls.png
          308 kB

        Issue Links

          is depended on by

          Bug - A problem which impairs or prevents the functions of the product. WT-1973 MongoDB changes for WiredTiger 2.7.0

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

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-21686 WiredTiger changes for 3.2.0-rc5

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-21752 slow2_wt fails by exhausting host machine's memory

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

          Web Link Pull request

          Activity

            People

              michael.cahill@mongodb.com Michael Cahill (Inactive)
              martin.bligh Martin Bligh
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              Dates

                Created:
                Updated:
                Resolved: