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NetApp Knowledge Base

High latency on SolidFire storage volume due to Max IOPs QoS set too low

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Category:
netapp-hci
Specialty:
hci
Last Updated:

Applies to

  • SolidFire
  • Hybrid Cloud Infrastructure
  • Element OS

Issue

High latency reported against a SolidFire storage volume. This might be observed in different ways.
 
2021-11-26 10_57_45-vSphere - NetApp-HCI-Datacenter - Events.png
  • In SolidFire Active IQ (AIQ) under Volumes > Active Volumes > Actions > View Details > Latency you will observe higher than expected latency values.
    clipboard_e38f5eabf411b19b2f41c87e21a67693b.png
  • In the Element UI under Reporting > Volume Performance you will observe higher than expected latency values:
    clipboard_e14073cb487e42c5da83c122f7c2e3a25.png
  • You will also notice during high latency that the throughput is hitting its highest peak based on the Max QoS set. Below example shows QoS Max of 15,000 IOPS with a max throughput of 100 MB/sec, but when you look on the overall cluster performance is relatively very low.      clipboard_ebcf8fc59e708da82ed6892e2f088070d.pngCluster overall performance shows barely hitting 5% clipboard_e66fd32446871c11abefcc61b169a1640.png

 

 

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