A Virtual Service for an online shopping site normally receives very low levels of traffic...

Avi Load Balancer health scoring uses analytics to compare current application behavior against expected or learned behavior. VMware Avi documentation explains that the system relies on analytics to determine health based on expectations of what a Virtual Service is expected to experience. It also describes the health score as the performance score minus resource and anomaly penalty scores. In this scenario, the application normally has very low traffic between 3 AM and 4 AM, but suddenly receives traffic comparable to daily peak levels. Even if the application performs well and users do not experience slowness, the unusual traffic pattern can be treated as anomalous compared with the learned baseline for that time period. Therefore, the most likely health score impact is an Anomaly Penalty.