slo
4 posts — newest first.
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Percentiles, Properly: You Cannot Average a p99
Averaging percentiles across shards or minutes produces a number that means nothing. Here is the arithmetic, plus why p99 gets worse as you add services.
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Your top AI failure mode is saturation, and the SLI is in a header you throw away
Datadog found ~5% of production AI requests fail, nearly 60% on capacity limits. Provider saturation is an SRE problem you already have the primitives for.
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Autonomy is a budget, not a toggle: error budgets for AI operators
SRE solved runaway release risk with error budgets. The same mechanism governs AI agents: authority per action class, demoted fast, promoted slow.
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SLI, SLO, SLA, and error budgets — the reliability contract explained
SLIs, SLOs, SLAs, and error budgets — the four numbers every SRE team must agree on, the math behind 'nines,' and what changes when agents burn the budget.