How is the average error rate of application performance observation calculated?

The average error rate of application performance observation is calculated by dividing the total number of errors encountered during a specific period by the total number of requests or transactions processed during that same period, then multiplying by 100 to express it as a percentage.

Formula:

\text{Average Error Rate (\%)} = \left( \frac{\text{Total Errors}}{\text{Total Requests}} \right) \times 100

Example:
If an application processes 10,000 requests in an hour and encounters 200 errors, the error rate is:

$\left( \frac{200}{10,000} \right) \times 100 = 2\%$

This metric helps monitor application reliability and identify issues affecting user experience. For cloud-based applications, Tencent Cloud's Application Performance Monitoring (APM) service can track error rates in real time, providing insights into failures and helping optimize performance.