Site Reliability Engineering
SLI Definition Reference
Search SLI definition patterns by service type. Covers request-based, availability, latency, freshness, and error rate SLIs with measurement and window guidance.
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About this tool
SLI Definition Reference
The SLI Definition Reference covers request success rate, availability, latency P99/P95, data freshness, and error rate SLIs with measurement approaches and window type guidance.
• Look up the correct SLI formulation for a data pipeline freshness requirement
• Find request-based SLI definition for an HTTP API before writing an SLO document
• Reference latency SLI percentile selection guidance before defining a P99 SLO
• Compare window types before deciding between calendar and rolling window for a new SLO
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FAQ
What does this tool tell you?
The SLI Definition Reference covers request success rate, availability, latency P99/P95, data freshness, and error rate SLIs with measurement approaches and window type guidance.
What affects the result most?
SLI = the metric, SLO = the target for that metric, SLA = the contractual commitment. Request-based SLI: good_requests / total_requests — most common for HTTP APIs. Availability SLI: uptime proportion — minutes_up / total_minutes.
How should I use the result?
Use this tool to orient quickly to the concepts, field names, or values you are about to look up in a full specification or vendor documentation. It summarizes the common cases; the authoritative source remains whichever standard or vendor doc defines the values themselves.
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