Uploaded image for project: 'Core Server'
  1. Core Server
  2. SERVER-21585

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

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: 3.2.0-rc3
    • Fix Version/s: 3.2.0-rc4
    • Component/s: WiredTiger
    • Labels:
      None
    • Backwards Compatibility:
      Fully Compatible
    • Operating System:
      ALL

      Description

      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:

        Attachments

        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

          Issue Links

            Activity

              People

              • Votes:
                0 Vote for this issue
                Watchers:
                16 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: