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    • Higher read I/O latency with some bursty workloads
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Higher_read_I_O_latency_with_some_bursty_workloads
      High LUN or volume read latency with some bursty workloads seen as coming from disks.
    • Why does the volume latency or IOPS not match the aggregate in Active IQ Unified Manager or ONTAP?
      https://kb.netapp.com/data-mgmt/AIQUM/AIQUM_Kbs/Why_does_the_volume_latency_or_IOPS_not_match_the_aggregate_in_Active_IQ_Unified_Manager_or_ONTAP
      Backend disk/aggregate IOPS should not be used as a metric for monitoring performance unless Performance Capacity hits 100% on the aggregate in Active IQ Unified Manager or disk latency is seen on use...Backend disk/aggregate IOPS should not be used as a metric for monitoring performance unless Performance Capacity hits 100% on the aggregate in Active IQ Unified Manager or disk latency is seen on user work A DR or backup filer with minimal frontend will use all available CPU and disk I/O bandwidth to process SnapMirror/backup workloads as quickly in the absense of frontend work By prefetching, the reads are in cache (RAM) as the IOP comes in through the network
    • AIQUM not generate events on volume latency
      https://kb.netapp.com/data-mgmt/AIQUM/AIQUM_Kbs/AIQUM_not_generate_events_on_volume_latency
      Applies to ONTAP 9.x Active IQ Unified Manager 9.x Issue AIQUM not generate events on volume latency for the following default events: QoS LUN MAX IOPS Warning Threshold Breached. QoS LUN MAX MBPS War...Applies to ONTAP 9.x Active IQ Unified Manager 9.x Issue AIQUM not generate events on volume latency for the following default events: QoS LUN MAX IOPS Warning Threshold Breached. QoS LUN MAX MBPS Warning Threshold Breached. QoS Volume MAX IOPS Warning Threshold Breached. QoS Volume Peak IOPS/TB Warning Threshold Breached. QoS Volume MAX MBPS Warning Threshold Breached.
    • How to create custom volume latency alerts in Active IQ Unified Manager
      https://kb.netapp.com/data-mgmt/AIQUM/AIQUM_Kbs/How_to_create_custom_volume_latency_alerts_in_Active_IQ_Unified_Manager
      Applies to Active IQ Unified Manager (AIQUM) Description To create a custom e-mail alert from AIQUM, this article outlines the steps based upon AIQUM 9.9