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    • High HostOS CPU utilization due to problems with secd
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/High_HostOS_CPU_utilization_due_to_problems_with_secd
      Applies to Clustered Data ONTAP 8.3 ONTAP 9 Issue Sudden or gradual increase in CPU utilization Unexplained and prolonged spikes in CPU utilization Running sysstat -M shows utilization in HostOS domai...Applies to Clustered Data ONTAP 8.3 ONTAP 9 Issue Sudden or gradual increase in CPU utilization Unexplained and prolonged spikes in CPU utilization Running sysstat -M shows utilization in HostOS domain compared to other domains On each of the affected nodes, running set diag -c off; systemshell -node nodename ps aux, confirms secd is the top consumer of HostOS resources. Higher than expected NAS Protocol latency Authentication request timeouts may be present
    • High CPU and latency caused by misconfigured Fpolicy
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/High_CPU_and_latency_caused_by_misconfigured_Fpolicy
      Applies to CIFS ONTAP 9 Issue When reviewing latency from reporting tools such as CLI, Active IQ Unified Manager, Grafana, etc. CIFS latency may report higher than the sum of the delay centers tracked...Applies to CIFS ONTAP 9 Issue When reviewing latency from reporting tools such as CLI, Active IQ Unified Manager, Grafana, etc. CIFS latency may report higher than the sum of the delay centers tracked in Data ONTAP Overall Latency can not be accounted for in any of the delay centers displayed Unexpected increase in CIFS latency
    • High HostOS Utilization due to process ndo_manager
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/High_CPU_utilization_due_to_HostOS_domain_due_to_process_ndo_manager
      Applies to ONTAP 9 HostOS utilization Issue High CPU on node due to HostOS domain, Running sysstat -M command shows high host domain utilization Sample output focusing on host Domain. AVG CPU0 CPU1 CP...Applies to ONTAP 9 HostOS utilization Issue High CPU on node due to HostOS domain, Running sysstat -M command shows high host domain utilization Sample output focusing on host Domain. AVG CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7 Nwk_Lg Nwk_Exmpt Storage Raid WAFL_Ex(Kahu) Exempt SSAN_Ex Intr Host Ops/s 65% 47% 43% 45% 75% 67% 75% 67% 71% 15% 10% 15% 4% 211%( 14%) 180% 161% 5% 335% 8911 84% 73% 74% 76% 87% 86% 88% 84% 89% 14% 9% 17% 5% 229%( 15%) 124% 167% 10% 366% 9892
    • High HostOS domain CPU utilization after deletion of LS mirror
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/High_HostOS_domain_CPU_utilization_after_deletion_of_LS_mirror
      Applies to ONTAP 9 Data ONTAP 8.2 / 8.3 CIFS Issue Numerous dsidLookup_1 RPC errors logged to VLDB log High HOST domain CPU utilization, after deletion of load-sharing (LS) mirror High CPU utilization...Applies to ONTAP 9 Data ONTAP 8.2 / 8.3 CIFS Issue Numerous dsidLookup_1 RPC errors logged to VLDB log High HOST domain CPU utilization, after deletion of load-sharing (LS) mirror High CPU utilization from mlogd and vldb host domain processes CIFS Timeout issues for some CIFS clients.