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.
#glossary
18 posts tagged "Glossary".
What Is Uptime Monitoring? From Check to Alert
Uptime monitoring checks a service from outside on a schedule and keeps the history. Here is how a failed check becomes an incident, and how fast.
Observability vs Monitoring: What Each One Answers
Observability is what your telemetry lets you ask, monitoring is the set of questions you already wrote down, and only one of them survives a dead host.
Infrastructure Monitoring: The Three Collection Methods
Infrastructure monitoring is defined by how data is collected, not which metrics you chart. Here is which layer each method reaches and which it cannot.
Browser Monitoring: Three Products, One Phrase
Browser monitoring means real user data, a scripted headless browser, or staff surveillance. Here is how to tell which one a vendor is selling you.
Five Nines Uptime: What 99.999% Really Costs
Five nines means 99.999% availability, about 5 minutes 15 seconds of downtime a year, and a budget smaller than most checks can resolve.