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  1. Core Server
  2. SERVER-21230

Insert performance degrades drastically or hangs on large capped collection with WiredTiger

    • Type: Icon: Bug Bug
    • Resolution: Incomplete
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: 3.0.1, 3.0.6
    • Component/s: WiredTiger
    • Linux

      We are using MongoDB to store some historical data and occasionally insert performance degrades drastically (up to hour for one record) or hangs.
      Issue was reproduced few times on MongoDB 3.0.1 and 3.0.6.
      Symptoms are the following:

      • inserts are slow or hang
      • mogostat hangs
      • mongotop works and shows 0 numbers
      • remote Robomongo hangs on attempt to connect
      • local mongo shell connects and can perform some commands but hanging on getting db/collection stats and queries

      pstack, WiredTiger stats, parts of mongod log, biggest DB stats and few longest Operations are attached.
      Some data removed as it can be sensitive.

        1. collection_stats.txt
          51 kB
        2. mongod.log
          19 kB
        3. mongodb.stack
          667 kB
        4. sar30
          101 kB
        5. Screen Shot 2015-10-30 at 16.54.39.png
          Screen Shot 2015-10-30 at 16.54.39.png
          46 kB
        6. stats.txt
          0.5 kB
        7. status.log
          17 kB
        8. WiredTigerStat.30.13
          576 kB
        9. WiredTigerStat.30.14
          576 kB
        10. WiredTigerStat.30.15
          393 kB

            Assignee:
            Unassigned Unassigned
            Reporter:
            dixenon Denys
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              Created:
              Updated:
              Resolved: