What is SLI (Service Level Indicator)?
A quantitative measure of a specific aspect of service performance.
An SLI (Service Level Indicator) is a carefully defined quantitative measure of some aspect of the level of service being provided. Common SLIs: availability (% of requests that succeed), latency (% of requests faster than 200ms), error rate (% of requests returning 5xx), and throughput (requests per second). SLIs are the raw measurements; SLOs are the targets set on top of SLIs. Choose SLIs that reflect what users actually care about.
More Monitoring Terms
AlertManager
Prometheus component that handles alert routing, grouping, and notification delivery.
Error Budget
The acceptable amount of downtime or errors before an SLO is breached.
Grafana
An open-source analytics and visualization platform for metrics, logs, and traces.
Loki
Grafana's horizontally scalable log aggregation system inspired by Prometheus.
Observability
The ability to understand the internal state of a system from its external outputs.
OpenTelemetry
An open-source observability framework for generating metrics, logs, and traces.
Test your knowledge of SLI (Service Level Indicator) and 130 other DevOps concepts