Skip to main content
NetApp Knowledge Base

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

Views:
457
Visibility:
Public
Votes:
0
Category:
netapp-hci
Specialty:
hci
Last Updated:

Applies to

  • NetApp Element software
  • NetApp SolidFire
  • NetApp HCI

Issue

  • High latencies reported against a SolidFire storage volume can be observed in different ways
  • If you are using VMware, the message "performance has deteriorated" will be observed in Monitor > Events:
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:

NetApp Element software

  • In the Element UI under Reporting > Volume Performance you will observe higher than expected latency values:

NetApp SolidFire

  • 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:

NetApp HCI

  • Cluster overall performance shows barely hitting 5% 

NetApp HCI

 

 

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.