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如何使用 "sysstat" 命令识别瞬时工作负载突发

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适用场景

ONTAP 9

问题描述

对因突发工作负载而导致的性能问题进行故障排除非常复杂。  由于大多数性能统计信息都是在一段时间内计算得出的平均值,在我们现有的性能监控和故障排除工具中,通常为 1 或 5 分钟。这些平均值不能表示突发期间的实际资源瓶颈,因此在某些情况下,需要进行更精细的数据收集,以便更好地了解吞吐量, CPU 计划和 CP 行为。 

sysstat 是一种非常好的工具,可以在更精细的级别,几秒甚至几毫秒收集一些基本统计信息。 

本文介绍了一种使用 sysstat 命令检测这些瞬时工作负载高峰的方法,尤其是那些只持续数百毫秒甚至仅仅数十毫秒的短时突发。 

 

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