SLO: Measuring App Performance
A SLO (Service Level Objective) is a specific target or range of values for a service level that is measured by a Service Level Indicator (SLI).
While the SLA is the external promise to the client, the SLO is the internal goal for the development team. For example, if the SLA promises 99% uptime, our internal SLO might be 99.9% to provide a safety margin. SLOs help us track Latency and error rates to identify issues before they affect the end-user.
Frequently Asked Questions
KPIs are business-focused (like “User Retention”), whereas SLOs are technical-focused (like “API response time under 200ms”).
This is a concept derived from SLOs. It is the amount of “unreliability” we are allowed to have before we must stop building new features and focus strictly on stability.
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