New Relic Metrics
Apdex Levels group users into categories of satisfaction with the response time of web applications and services. These levels are defined as satisfied, tolerating or frustrated depending on their response time in comparison to a threshold.
Apdex is a measure of users' satisfaction with the response time of web applications or services. The Apdex Score is a value between 0 and 1, calculated based on three Apdex levels of user satisfaction: frustrated, tolerating, or satisfied.