+Average Response Timen Response Time is defined as the time it takes for each Web pageto load.n How we capture?n Hit the server with a specified number of user (could be in pattern)and then capture the response time of the server.n Refer the plot of ART on next page.
+Average Response Time0100200300400500600Page 1 (in ms)Page 2 (in ms)Page 3 (in ms)
+Problems with Average ResponseTimen It’s a bad way of tracking website performance.n It doesn’t indicate or hint about the outliers.n We tend to average the number of samples than the quantityitself.n It represents a distorted picture in case of exceptionalscenario with extremely high response time.
What we need?
+ Apdexn Created by Peter Sevcik of Apdex Alliance (apdex.org).n How is it calculated?n ApdexT = (# Satisfied requests + # Tolerating requests / 2)(# Total requests)APDEX: Application Performance Index
+How it scores over Average ResponseTimen It help takes us Go-No-Go decision.n It’s doesn’t hide outliers. It yells the number of users affected by theproblem.n It doesn’t get distorted when there are extremely high responsetimes.n It’s a measure towards Satisfaction score and can be derived basedon threshold. It’s not a fix number.
+ One last thing…Load TestingStressTestingSoak TestingPerformanceTuning