Skip to main content
NetApp Knowledge Base

How to measure CPU Utilization in 7mode mode device

  1. Last updated
  2. Save as PDF
Views:
362
Visibility:
Public
Votes:
1
Category:
ontap-9
Specialty:
perf
Last Updated:

Applies to

  • Data ONTAP 8 7-Mode 
  • Data ONTAP 7 and earlier 

Answer

Verify the CPU utilization with the following commands : 

  1. Using sysstat -M 1

netapp> priv set diag
netapp*> sysstat -M 1
ANY1+ ANY2+ ANY3+ ANY4+  AVG  CPU0 CPU1  CPU2  CPU3
93%    80%  36%   15%    56%  38%   32%  82%   72%

Nwk_Excl Nwk_Lg Nwk_Exmpt Protocol Cluster Storage Raid Raid_Ex Target Kahuna
1%         68%     1%       0%        0%      4%     0%  19%      0%    11%

WAFL_Ex(Kahu) WAFL_XClean SM_Exempt Cifs Exempt SSAN_Ex Intr Host Ops/s  CP
80%( 75%)      14%            0%      0%   24%    0%     1%    1%   0    83%

In this example, Average CPU Utilization is 56% and the nwk_legacy domain (max concurrency of 1) is 68%.

  • To analyze for a WAFL bottleneck, Kahuna is 11% and WAFL_Ex is 75%, or 86% in total:
    • As this is < 100%, it is not a bottleneck. However, if it is nearing 100%, it might still not be a concern without other contributing performance indicators.
  • While CPU (logical and physical) utilization is exposed by Data ONTAP, CPU utilization should not be used as a first-order metric for evaluating the overall performance of a system.
    • Instead, the inputs and outputs associated with the requested user work should be the first-order metric.
  • A focus on actual latency for work being serviced (Response Time) and the quantity of operations being processed in terms of IO requests or Bytes (Throughput) is recommended.
  • This measure of performance is relevant to a given workload and abstracts the complex nature of logical and physical CPU scheduling variations.
  1. Using sysstat - x 1 

fas01> priv set diag
Warning: These diagnostic commands are for use by NetApp
         personnel only.
fas01*> sysstat -x 1
 CPU    NFS   CIFS   HTTP   Total     Net   kB/s    Disk   kB/s    Tape   kB/s  Cache  Cache    CP  CP  Disk 
                                       in    out    read  write    read  write    age    hit  time  ty  util 
  2%      0      0      0     104       0      0       0      0       0      0   >60    100%    0%  -     0% 
  2%      0      0      0       1       0      0       0      0       0      0   >60    100%    0%  -     0% 
  2%      0      0      0       1       0      0       0      0       0      0   >60    100%    0%  -     0% 
  2%      0      0      0       0       0      0      64    771       0      0   >60    100%    1%  T     1% 
  2%      0      0      0      99       0      0       0      0       0      0   >60     99%    0%  -     0% 
  1%      0      0      0       0       0      0       0      0       0      0   >60    100%    0%  -     0% 
  1%      0      0      0       2       0      1       0      0       0      0   >60    100%    0%  -     0% 
  1%      0      0      0       0       0      0       0      0       0      0   >60    100%    0%  -     0% 

In this example, CPU Utilization can be viewed from the first column which is 2%.

Additional Information

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.