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Nuno blog: notes on AWS, Kubernetes and cloud cost

My 99.994% Was Wrong: The SLI That Missed 90% of the Errors Customers Saw

A success SLO that counted only application errors read 99.994%. Counting load balancer 5xx too, it was 99.9575%, and errors had not fallen at all.

Vander Nunes
October 20, 2026
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Two success rate gauges side by side, one reading 99.994% and the corrected one reading 99.9575%

Hiring an AWS Cost Optimization Consultant? What the Review Should Hand You

What a good AWS cost review delivers, what it should never ask for, and the red flags I would watch for before hiring anyone, including me.

Vander Nunes
October 16, 2026
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