An “error budget” describes the amount of time a system can be offline before it has tangible consequences for your business. Error budgets are used alongside service level agreements (SLAs) and service level objectives (SLOs) to inform organizations when a system’s unavailability has tipped into a breach of contract.
Incorporating error budgets into your application reliability strategy provides a methodical approach for balancing risk-taking with stability. Error budgets acknowledge that occasional outages, buggy deployments, and simple mistakes are inevitable. Their role is to tell you how many of these incidents you can endure. The available error budget also decides whether your next task is building a new feature or tackling another bug fix.
What Is an Error Budget?
A service’s error budget is simply a measure of the maximum time it can be in a failed state without incurring contractual, financial, or regulatory penalties. The available error budget is derived from the uptime figure you commit to in the SLAs you send to customers. You could be more stringent by basing your error budget on an SLO instead.
- SLA –…
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