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如何测量CPU利用率

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适用场景

  • ONTAP 9
  • 集群模式 Data ONTAP 8 

问题解答

在系统整体视图中,使用命令行实时查看 CPU 利用率:

注意: CPU域在文章中 作为计算资源列出、CPU域在ONTAP 9中进行了说明

使用以下命令验证CPU利用率: 

  1. 使用sysstat -M 1

netapp::> set diag
Warning: These diagnostic commands are for use by NetApp personnel only.
Do you want to continue? {y|n}: y
netapp::*> node run -node netapp-01 sysstat -M 1
ANY1+ ANY2+ ANY3+ ANY4+ ANY5+ ANY6+ ANY7+ ANY8+ ANY9+ ANY10+ ANY11+ ANY12+ ANY13+ ANY14+ ANY15+ ANY16+  AVG 
 100%  100%  100%   99%   98%   96%   94%   91%   86%   81%   76%   70%   64%   57%   48%   37%   81%

CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7 CPU8 CPU9 CPU10 CPU11 CPU12 CPU13 CPU14 CPU15 
 78%  76%  77%  83%  82%  83%  82%  82%  82%  82%   83%   84%   83%   82%   83%   82% 

Nwk_Excl Nwk_Lg Nwk_Exmpt Protocol Cluster Storage Raid Raid_Ex Target Kahuna WAFL_Ex(Kahu)
    3%    2%    450%     0%    0%    49%   2%   136%    0%    4%   511%( 94%) 

WAFL_XClean SM_Exempt Cifs Exempt SSAN_Ex Intr Host  Ops/s   CP
     0%     0%   0%   112%    0%  28%   8%  47111   0%

在上面的示例中、16个核心的平均CPU利用率为81%。  

最繁忙的域:

  • WAFL 免除了 511% 的限制
  • 网络免除了 450% 的限制
  • RAID 免除 136% 的限制,而免除 120% 的限制。
  • WAFL 在示例间隔中处于活动状态的占 98% 、在串行处理中花费 4% 、在并行处理中花费 94% 。 
  • WAFL 串行处理能力很低,并行化 WAFL 可能会完成更多的工作
  • 如果没有其他性能指标,则在样本间隔内保持 98% 的活动状态不是一个问题。
  • 整体 CPU 资源越来越少,从而增加了 CPU 排队工作的可能性,可能会影响客户端延迟。
  1. 使用sysstat -x 1. 

cluster1::> set diag
Warning: These diagnostic commands are for use by NetApp personnel only.
Do you want to continue? {y|n}: y
cluster1::*> node run -node cluster1-01 sysstat -x 1
 CPU   NFS   CIFS   HTTP   Total    Net   kB/s   Disk   kB/s   Tape   kB/s   Cache  Cache   CP 
                    in   out   read  write   read  write    age   hit  time 
  2%    0    0    0    24     7    7    12     0     0    0  >60   100%   0% 
  2%    0    0    0     5    11    4     0    24     0    0  >60   100%   0% 
  4%    0    0    0     0     9    9    20   1274     0    0  >60   100%   1% 
  4%    0    0    0     3     7    8    12    36     0    0  >60    -    0% 
  1%    0    0    0     1     4    5     0     0     0    0  >60   100%   0% 
  2%    0    0    0    20     6    5     0     0     0    0  >60    -    0% 
  5%    0    0    0     8     5    6    12    24     0    0  >60    -    0% 
  1%    0    0    0     0    12    13    12     0     0    0  >60    -    0% 
  2%    0    0    0     0     3    4     0    36     0    0  >60    -    0% 

 

在以上示例中、可以从第一列(即2%)查看CPU利用率。

 

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