SLI (Service Level Indicator)
An SLI is the measurement behind an SLO. Why a ratio of good to valid events is a useful form, where to measure it, and which indicators suit each system.
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SLO (Service Level Objective)
An SLO is a target for how reliable a service must be over a window. See what it must specify, how error budgets turn it into decisions, and how to set one.
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SLOs, Alerting, and Error Budgets
Pages should mean users are hurt faster than the objective allows. This article builds SLIs, burn-rate alerts, and an error budget policy.