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High CPU utilization - Resolution Guide

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Category:
ontap-9
Specialty:
perf
Last Updated:

Applies to

ONTAP 9

Description

This is an article to assist in determining the source of high CPU utilization and if it is affecting workload. 

Example graph of high CPU

 

  • Commands such as sysstat report high CPU (columns removed for readability): 
    • Cluster::> set -privilege diag; run -node 1 sysstat -x -d -c 160 -s 1
 CPU    Total      SSD   kB/s    SSD   OTHER    FCP  iSCSI     FCP   kB/s  
                  read  write    util                           in    out  
100%   937103   3575433      12    27%     43 937060      0   22489 3835476
100%   942704   3597300      24    27%     38 942666      0   22624 3857797
100%   933527   3560887       0    27%      7 933520      0   22405 3820792
100%   977261   3730533      24    28%     38 977223      0   23454 3999694
100%   930011   3552147    2733    26%    219 929792      0   22315 3805681
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