SLI.
also: SLIs · service level indicator · service level indicatorsService level indicator: a measured number describing service behaviour, such as the share of requests served successfully under 200 ms.
the two-minute refresher
- SLI = the measurement; SLO = the target; SLA = the promise with consequences.
- Usually good events ÷ valid events: availability, latency, correctness, freshness.
- Measure what users feel, as close to them as possible.