Website Performance Monitoring: What to Alert On
Website performance monitoring is two jobs sharing a name. Delivery timings belong on a pager, Core Web Vitals belong on a dashboard. Here is the split.
#response-time
6 posts tagged "Response Time".
Website Monitoring: The First Four Checks to Set Up
Website monitoring done in the right order: four checks, a 60-second interval, two regions and a confirmation rule, then a week of tuning before you expand.
Uptime Percentage: Why Your Check Interval Caps It
An uptime percentage is a sample, not a recording, and its precision is bounded by your check interval. Here is the arithmetic and why two tools disagree.
Real User Monitoring: What RUM Sees and What It Misses
Real user monitoring times pages inside visitors' browsers. Here is what those APIs report, how much of it never arrives, and why it cannot detect an outage.
Apdex Score: The Formula, T, and What It Hides
Apdex folds response times into one number from 0 to 1 by grading each sample against a threshold you choose, and that threshold is the whole decision.
Response Time Monitoring: Phases, Percentiles, Regions
Response time monitoring works when you read the timing waterfall, alert on p95 instead of the mean, and compare probe regions rather than blending them.