Time of Congestion Events
Detecting the time of congestion helps in correlating it with other events such as a scheduled backup job on a virtualized server, increased activity during peak business hours, or changes to application behavior. Refer to Chapter 4, the section on <> for related details. Congestion events that are date and time-stamped are extremely important for effective troubleshooting. 检测拥塞时间有助于将其与其他事件关联起来，如虚拟化服务器上的计划备份作业、业务高峰期活动的增加或应用程序行为的变化。有关详细信息，请参阅第 4 章 <> 节。带有日期和时间戳的拥塞事件对于有效排除故障极为重要。
How to Detect Congestion
The following are high-level approaches for detecting congestion. 以下是检测拥堵的高级方法。
Reactive Approaches
Reactive approaches include troubleshooting congestion issues after they happen, typically while working with the support teams or doing detailed investigations of network design and traffic flow. 反应式方法包括在拥塞问题发生后排除故障，通常是与支持团队合作或对网络设计和流量进行详细调查。
Proactive Approaches
Proactive approaches detect congestion in real time. They result in alerting the admins before the applications complain about performance degradation and
