Glossary term
What is SLI (Service Level Indicator)?
SLI stands for Service Level Indicator.
In System Design
What you measure about user experience. Example: % of checkout requests that succeed.
Learn it properly · System DesignLesson 47: SLI, SLO, SLA & Error BudgetsProduct wants to ship daily; operations wants fewer changes; nobody agrees what “reliable enough” means. SLIs, SLOs and SLAs turn it into one number, and error budgets turn that number into a simple rule for when to move fast and when to slow down.In Observability & SRE
A measurement of how well a service is doing from the user's view, usually good events divided by valid events.
Learn it properly · Observability & SRELesson 4: SLIs, SLOs and Error BudgetsChoosing indicators, setting objectives, how nines translate to minutes, burn rates and what error budgets are for.