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对于极突发的SAN工作负载、CPU_protocol的延迟

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ontap-9
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perf<a>2008392596</a><a>突发工作负载</a><a>基本LUN线程</a>
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适用场景

ONTAP 9

问题描述

  • 对于极突发的 SAN 工作负载、观察到高延迟。延迟细分显示网络和协议处理延迟较高、这可 通过多种方式观察:
    • perfstat:延迟自CPU_protocol
    • PerfArchive:延迟自Network
    • 其他性能监控工具(如NetApp Grofe/Grafana)也会出现类似的延迟故障。
    • 命令行: qos statistics workload latency show 或的 qos statistics volume latency show 延迟来自 Network

示例:

对于极突发的SAN工作负载、CPU_protocol的延迟

  • CPU_protocol/Network 如果SAN处理CPU域(例如)中没有CPU争用,则会出现高延迟 SSAN_Ex。 

示例: sysstat -M 1(诊断模式)

对于极突发的SAN工作负载、CPU_protocol的延迟

注意: 如果整体CPU争用、则 CPU_protocol/Network 预期会出现延迟、此处的讨论将不适用。 

  • 以下知识库文章有助于检测是否存在异常突发的工作负载

如何使用sysstat命令识别瞬时工作负载突发

 

 

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