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Citrix FSLogix latency on SVM with excessive puch holes

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Category:
ontap-9
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NAS
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Applies to

  • ONTAP 9.16.1P10
  • SMB/CIFS protocol
  • FSLogix profile shares (Citrix)

Issue

  • Citrix FSLogix profile shares on SVM experience high latency and access failures during periods of increased workload.
  • Users are unable to log into Citrix, slow logins, application freezes/disconnects, and slow file access observed.
  • Latency increased from expected ~2ms to ~60ms
  • Observed error:
Mon Oct 12 08:48:27 +0200 [cluster01: kernel: Nblade_CifsOperationTimedOut_1:error]: params: {'commandName': 'SMB2_COM_IOCTL', 'suspensionCnt': '1', 'cmdRestartCnt': '0', 'lastCsmError': 'CSM_OK', 'remoteBladeID': '98b98d42-9827-11e9-a135-00a098fad2b4 (node01)', 'isQosEnabled': 'QoS_disabled', 'lastSpinNpError': 'SUCCESS', 'clientIpAddress': 'x.x.x.x', 'localIpAddress': 'x.x.x.x', 'vserverId': 'xx', 'dsId': '123455656', 'vserverName': 'SVM-1', 'volumeName': 'vol_name_01'}

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