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从工作负载空闲到忙碌的突发延迟和 CPU 利用率由 QoS 解决

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适用于

  • ONTAP 9
  • ONTAP Select v9.12.1 及更高版本
  • FAS/AFF 系统

问题描述

  • 中央处理单元(CPU)高,接近或持续处于 100%
  • 写入任意位置文件布局(WAFL)WAFL_Ex可能是最繁忙的域之一(数据处理发生的地方)
  • 主机报告一天中特定持续时间的高输入/输出(IO)等待时间。
  • 客户端在访问多个共享时报告速度缓慢,并且可能会注意到 Active IQ Unified Manager(AIQUM)在同一时间戳上的延迟增加。

2009606555 - Issue.png

  • 延迟已经增加,并且突然变高。
    • NFS 可能受到影响。
  • sysstat -M 1 可用于检查最繁忙的域。
    • 示例:sysstat output 显示由于用户工作负载增加导致的 CPU 增加(为了可读性而删除的列)
Cluster::> node run -node <node> -command sysstat -x 1 CPU NFS CIFS HTTP Total Net kB/s HDD kB/s in out read write 11% 1324 0 0 1324 169 131 5300 0 28% 72 0 0 72 483 526 4928 12 53% 175 0 0 175 254 407 5176 24 23% 143 0 0 143 146 72 4752 0 12% 230 0 0 230 134 259 5808 24 40% 5766 0 0 5766 207 720 44336 36956 53% 108 0 0 108 15698 14391 32340 24 46% 30 0 0 30 30975 30269 29900 0 87% 32124 0 0 32124 576397 53287 203513 12 99% 44334 0 0 44334 659406 45518 256931 251353 99% 43692 0 0 43692 609739 16930 263599 565448 99% 44492 0 0 44492 633509 41562 261366 116257

 

 

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