High CPU Alerts while running system controller replace

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Views:: 110
Visibility:: Public
Votes:: 0
Category:: ontap-9
Specialty:: perf
Last Updated:
Applies to

ONTAP 9
Issue

Alerts while starting “system controller replace” due to high CPU usage on the Cluster Nodes
Example:
Cluster::*> set -priviege diagnostic; system controller replace show-details
Task Phase       Node            Task Name            Operation-State
---------------- --------------- --------------------- -----------------------
Precheck         node2           Cluster Health Check  Completed
...
                                 CPU Utilization Check Failed
                                                       CPU utilization for HA
                                                       pair node node2 is more
                                                       than 50 percent.
sthk-pidpa::*> node run -node node2 -command sysstat -c 10 -x 3
 CPU    NFS   CIFS  HTTP    Total     Net   kB/s    Disk    kB/s    Tape   kB/s   Cache  Cache   CP           CP_Ty               CP_Ph       Disk   OTHER    FCP  iSCSI     FCP   kB/s   iSCSI   kB/s   NVMeF   kB/s   kB/s   NVMeT   kB/s   kB/s
                                       in    out    read   write    read  write     age    hi  time  [T--H--F--N--B--O--#--:]  [n--v--p--f]   util                            in    out      in    out             in    out             in    out
 40%   7654     84      0    9059  104279  80501  185664      15       0      0     6s    92%    0%   0--0--0--0--0--0--0--0    0--0--0--0      0%      13   1308      0   11466   5363       0      0       0      0      0       0      0      0
 73%   6979    107      0    8948   89607  52612  722544  442976       0      0     7s    94%   86%   0--0--1--0--0--0--0--0    0--0--0--1      2%      17   1845      0  171847   4017       0      0       0      0      0       0      0      0
 61%   6623     94      0    8477  143147  58931  457572   38280       0      0     6s    95%   46%   0--0--0--0--0--0--0--0    0--0--0--0      1%      58   1702      0   26899   8302       0      0       0      0      0       0      0      0
 45%   8218     34      0    9628   81215 117255  215221      12       0      0     4s    95%    0%   0--0--0--0--0--0--0--0    0--0--0--0      1%      10   1366      0  110572   6476       0      0       0      0      0       0      0      0
 44%   6327     59      0    8217   94576  74678  234659     825       0      0     5s    93%    3%   0--0--0--0--0--0--0--0    0--0--0--0      1%      90   1741      0   11346   9303       0      0       0      0      0       0      0      0
 56%   5518     90      0    7843  131292  58427  336813   33717       0      0     8s    93%   40%   0--0--1--0--0--0--0--0    0--0--0--1      1%      34   2201      0   10890  11510       0      0       0      0      0       0      0      0
 77%   6093     43      0    7548   86325  57270  752097  100363       0      0     5s    95%  100%   0--0--0--0--0--0--0--1    0--0--0--1      3%      68   1344      0   31639   7562       0      0       0      0      0       0      0      0
 85%   5807     73      0    9017  105403  64148  847921  257817       0      0     3s    95%  100%   0--0--0--0--0--0--0--1    0--0--0--1      2%     285   2852      0   15025   9967       0      0       0      0      0       0      0      0
 70%   6099    149      0    8429   68492  66246  578776   95905       0      0     4s    95%   36%   0--0--0--0--0--0--0--0    0--0--0--0      1%      30   2151      0   11274  14736       0      0       0      0      0       0      0      0
 69%   6420     22      0   22733   91995  55420  656428       8       0      0     1s    83%    0%   0--0--0--0--0--0--0--0    0--0--0--0      1%     156  16135      0   88821 911969       0      0       0      0      0       0      0      0