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High CIFS latency on new shares based on LOCK MANAGER

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ontap-9
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perf
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Applies to

  • SMB
  • ONTAP
  • All FAS, AFF, or Cloud Volumes ONTAP systems

Issue

  • High operation latency for locking files based on feature CIFS OPLOCKS enabled
  • This may be seen during takeover, giveback, or aggregate relocation events when override vetoes is enabled
  • This could also be seen during Azure maintenance events in Azure HA pairs
  • This may show up as Data Processing latency during the issue:
    • Cluster::> qos statistics volume latency show
      Workload            ID    Latency    Network    Cluster       Data       Disk        QoS      NVRAM
      --------------- ------ ---------- ---------- ---------- ----------  ---------  ---------  ---------
      -total-              -   136.49ms    99.00us    70.00us   136.17ms   153.00us        0ms        0ms
      vserver1_vol1..   4201   206.05ms   130.00us        0ms   205.88ms    44.00us        0ms        0ms
      vserver5_vol8..   7704  1309.00us   351.00us     1.00us   834.00us   114.00us        0ms     9.00us
      -total-              -   140.29ms   103.00us    75.00us   139.94ms   174.00us        0ms        0ms
      vserver1_vol1..   4201   379.03ms   127.00us        0ms   378.73ms   175.00us        0ms        0ms
      vserver5_vol8..   7704     2.02ms   309.00us     1.30us  1820.00us   105.00us        0ms     9.00us

 

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