Performance · Website glossary

Uptime

Quick answer · What is Uptime?

The time or proportion of time a monitored system is considered available under a stated definition.

IN PRACTICE

Uptime: an example

An HTTP check records whether a chosen endpoint returns an expected response during sampled checks.

KEEP IN MIND

A reachable homepage does not prove checkout, email, or every user journey is working.

Put the idea to work

Frequently asked questions

What is a practical example of Uptime?

An HTTP check records whether a chosen endpoint returns an expected response during sampled checks.

Does a reachable homepage prove that every user journey works?

A reachable homepage does not prove checkout, email, or every user journey is working.

Which concepts should I read alongside Uptime?

Monitoring: The ongoing collection and evaluation of signals used to understand a system's condition and detect problems.
Service-level agreement: An agreement that defines service commitments, their measurement, exclusions, and any stated remedies.