Slowness doing additional workload such as volume moves on FAS9000 or larger systems

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Views:: 53

Visibility:: Public

Votes:: 0

Category:: ontap-9

Specialty:: perf

Last Updated:

Applies to

ONTAP 9
FAS9000
AFF-A700
AFF-A800
AFF-A900
Other platforms with more than 32 CPU cores.

Issue

Sudden slowness is seen.
Volume Move may trigger this or some other added workload.
Example: CPU shows 100% busy using sysstat -x 1 but looking at sysstat -M 1 the CPU utilization the average is 50% or less.

Cluster::> node run netapp-01 sysstat -x 1
CPU    NFS     CIFS   HTTP   Total   Net   kB/s     Disk     kB/s   
                                     in    out      read     write   
100%  65782      0      0   65782  14918   2953948  1325731 14920
99%   64522      0      0   64522  13125   2743195  1256472 12126
99%   64656      0      0   64656  12121   2735679  1211287 12120
100%  65898      0      0   65989  14812   2948834  1389425 14815 
Cluster::> set advanced
Warning: These diagnostic commands are for use by NetApp personnel only.
Do you want to continue? {y|n}: y
Cluster::*> node run -node netapp-01 sysstat -M 1
ANY1+ ANY2+ ANY3+ ANY4+ ANY5+ ANY6+ ANY7+ ANY8+ ANY9+ ANY10+ ANY11+ ANY12+ ANY13+ ANY14+ ANY15+ ANY16+
100%  100%  100%  100%  100%  100%  100%  100%  100%   100%   100%   100%   100%   100%   100%   100%
ANY17+ ANY18+ ANY19+ ANY20+ ANY21+ ANY22+ ANY23+ ANY24+ ANY25+ ANY26+ ANY27+ ANY28+ ANY29+ ANY30+ ANY31+ ANY32+  AVG
  94%     32%     0%     0%     0%     0%     0%     0%     0%     0%     0%     0%     0%     0%     0%     0%  51%
CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7 CPU8 CPU9 CPU10 CPU11 CPU12 CPU13 CPU14 CPU15
99%  98%  98%  98%  98%  98%  98%  98%  97%  97%   97%   97%   97%   97%   97%   97%
CPU16 CPU17 CPU18 CPU19 CPU20 CPU21 CPU22 CPU23 CPU24 CPU25 CPU26 CPU27 CPU28 CPU29 CPU30 CPU31
  39%   34%   33%   33%   32%   31%   18%   15%    2%    0%    0%    0%    0%    0%    0%    0%
Nwk_Excl Nwk_Lg Nwk_Exmpt Protocol Cluster Storage Raid Raid_Ex Target Kahuna WAFL_Ex(Kahu)
      0%     1%      730%       0%      0%      1%   0%     88%     0%     0%    553%( 44%)
WAFL_XClean SM_Exempt Exempt SSAN_Ex Intr Host  Ops/s   CP
        55%        0%   232%      8%  28% 218%  47111   0%