class diagrams cannot represent dynamic relationships between classes

When a ticketing website conducts a big promotion, due to the huge amount of instantaneous visits, the website is easily paralyzed. To cope with traffic spikes, which of the following microservice governance methods can effectively deal with this scenario and prevent system overload and crashes?

Huawei Cloud Distributed Database Middleware DDM service can achieve transparent read and write separation.

Users of the Huawei Cloud Container Engine CCE service cannot upgrade the old version of the cluster.

In the IOT industry. The amount of data transmitted by the device is very small and usually has a fixed time interval. In this case, the CPU utilization is very low. Which solution can Huawei Cloud PaaS be used to save costs?
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