"Average Response Time" is calculated based on two types of response time:
1. Health check response time
   (1)RS with main health check:
       The repsonse time of main health check will be used.
   (2)RS without main health check, but with additional health checks:
       The repsonse time of first additional health check will be used.
   (3)RS without main health check, and without additional health checks too:
       No response of health check can be used.

2. Real traffic response time(only on http|https real service)

"Average Response Time" is the average value of last 20 response times.