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  1. Core Server
  2. SERVER-44187

High I/O load in Secondary node

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Works as Designed
    • 3.2.10
    • None
    • WiredTiger
    • None
    • Fully Compatible
    • ALL
    • Hide

      (1)Keep the database operation scenario unchanged

      (2)Watch the primary iops

      (3)Watch the secondary iops
      Observing the main iops situation

      Show
      (1)Keep the database operation scenario unchanged (2)Watch the primary iops (3)Watch the secondary iops Observing the main iops situation

    Description

      In the scenario of continuous insertion and update, the role of mongodb is changed on the same host, and iostat is used to monitor the performance of io. It is found that the value of %util is much lower than that of seconary while in role primary.

      Attachments

        1. secondary mongostat.jpg
          secondary mongostat.jpg
          250 kB
        2. secondary iops.jpg
          secondary iops.jpg
          157 kB
        3. primary mongostat.jpg
          primary mongostat.jpg
          254 kB
        4. primary iops.jpg
          primary iops.jpg
          199 kB

        Activity

          People

            dmitry.agranat@mongodb.com Dmitry Agranat
            879811746@qq.com miao yimin
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            Dates

              Created:
              Updated:
              Resolved: