SLI
Service Level Indicator
A measurement used to evaluate a specific aspect of service performance.
Plain English
The number that tells you how the service is doing.
In context
An SLI defines the measured signal such as successful request ratio or latency that supports an SLO.
Example
“Request success rate is the SLI for this SLO.”
When you'll hear this
- monitoring design
- SLO planning
- incident review
Common misunderstanding
An SLI is a measurement definition rather than the target value.
Also known as
service level indicator
Commonly used by
Related terms
Often compared with
Updated: 2026-08-25
