CHAPTeR 9 DXP PeRfORMANCe OPTIMIzATION • Collect and report test results: • Response times vs. number of users • Throughput vs. number of users • Transactions per second • Hits per second • Users vs. time • Errors • CPU utilization vs. number of users/time • Memory utilization vs. number of users/time • Throughput achieved We can document the response times at various workloads as shown in Table 9-3. Table 9-3. Ramp-Up Test for Transactions Workload Transactions Response time Minimum Time Average Time Maximum Time 90% Time 100 users User login Key Performance Metrics The main performance metrics for web page components are given as follows: • Time to first byte (TTFB): It is the time taken by the server to send the first response to the browser. TTFB is the measure of server responsiveness. A smaller TTFB is essential for optimal page response time. • Page size: It is the overall size of a web page including the HTML and static assets (images, videos, scripts, stylesheets, fonts, etc.). A large page size delays the page load time, hence it is recommended to reduce the overall page size. 243