capacity-planning
3 posts — newest first.
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The Generators Were Fine. The Sensor Was on the Wrong Side of the Breaker.
Google's final report on the europe-west2 zone outage: a check that measured the wrong thing, redundancy lost to maintenance, and why multi-zone still degraded.
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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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Queueing Theory for SREs: Little's Law and the Utilisation Knee
Latency doesn't rise with load, it rises with 1/(1−utilisation). Two formulas explain the p99 cliff and size every pool in your system.