application performance monitoring Archives

Percentile, Best Measure For Response Time

What Is A Percentile? Percentile (common measurement in statistics) splits the given sample group into 100 equal-sized intervals and this enables the data to be analyzed in terms of percentages. We can explain the usage of percentile with an example: The response time for an HTTP request below which 90% of the response time values lie, is called the 90-percentile response time. In the following graph, 90% of the requests is processed in 3.0 seconds or less: Why Do We Use Percentiles? If we speak statistically, there are a lot of methods to define just how good of an [...]

Load Tests and End-to-End Back-end Analysis

Even though, load testing and performance testing have different meanings in the software world, the basis is the same; to be able to fully answer the following questions. "How does the system behave under a certain load?" "What kind of infrastructure do I need within acceptable values?" "How far does this system take us with these resources?" To get these answers, you must first be able to apply similar loads and see the current behavior of the system. The next step is analysis. What Will We Analyze? The analysis part is very thorough. Because at this point, we also [...]