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  1. Core Server
  2. SERVER-25974

Application threads stall for extended period when cache fills

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    • Type: Icon: Bug Bug
    • Resolution: Done
    • Priority: Icon: Critical - P2 Critical - P2
    • 3.2.10, 3.3.15
    • Affects Version/s: 3.2.9, 3.3.10
    • Component/s: WiredTiger
    • Fully Compatible
    • ALL

      Under some conditions when cache utilization reaches 100%, the system can go into a state where

      • operation rate falls to near-zero levels
      • application threads stall for tens of seconds, apparently attempting but not succeeding in evicting pages.

      This state can persist for many minutes.

        1. test5-io-saturation.png
          test5-io-saturation.png
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        2. server-25974-rc0-vs-rc1-dd.tgz
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        3. Screen Shot 2016-09-18 at 4.38.53 PM.png
          Screen Shot 2016-09-18 at 4.38.53 PM.png
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        4. Screen Shot 2016-09-18 at 2.18.01 PM.png
          Screen Shot 2016-09-18 at 2.18.01 PM.png
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        5. s25974_seen_queue.png
          s25974_seen_queue.png
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        6. s25974_oplog_cache.png
          s25974_oplog_cache.png
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        7. s25974_new_connections.png
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        8. repro.png
          repro.png
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        9. issue.png
          issue.png
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        10. 3.2.10-rc1-timeseries.png
          3.2.10-rc1-timeseries.png
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        11. 3.2.10-rc0-timeseries.png
          3.2.10-rc0-timeseries.png
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        12. 3.2.10-rc0_event.png
          3.2.10-rc0_event.png
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            Assignee:
            alexander.gorrod@mongodb.com Alexander Gorrod
            Reporter:
            bruce.lucas@mongodb.com Bruce Lucas (Inactive)
            Votes:
            3 Vote for this issue
            Watchers:
            30 Start watching this issue

              Created:
              Updated:
              Resolved: