Cache usage exceeds configured value, operations stall, WiredTigerLAS.wt grows

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    • Type: Bug
    • Resolution: Done
    • Priority: Major - P3
    • 3.2.0-rc4
    • Affects Version/s: 3.2.0-rc3
    • Component/s: WiredTiger
    • None
    • Fully Compatible
    • ALL
    • None
    • 3
    • None
    • None
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      Multiple tests are seeing a cluster of apparently related symptoms:

      • During the last portion of a checkpoint cache usage grows to well above the configured maximum
      • Operations stall, probably as a result of cache exceeding maximum
      • The WiredTigerLAS.wt file grows without bound, and circumstantial evidence related to the use of the WT lookaside cache connects this with the previous two symptoms.
      • FTDC data capture stalls

      Three examples from two different apps:

        1. ex1.png
          ex1.png
          188 kB
        2. ex2.png
          ex2.png
          199 kB
        3. ex3.png
          ex3.png
          195 kB
        4. oplog-stalls.png
          oplog-stalls.png
          161 kB
        5. stalls.png
          stalls.png
          175 kB
        6. update_repro.js
          1 kB
        7. update_repro.png
          update_repro.png
          154 kB

            Assignee:
            Keith Bostic (Inactive)
            Reporter:
            Bruce Lucas (Inactive)
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            Watchers:
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              Created:
              Updated:
              Resolved: