Rajesh P • 9/2/2025

Understanding the P95/P99 Latency Principle: Why the Slowest Requests Matter Most

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This article details the importance of P95 and P99 latency metrics in system performance, contrasting them with average response time. It uses a coffee shop analogy and a technical example to show how these percentiles reveal the experience of the slowest requests, which define user perception of reliability.

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#performance monitoring #latency #observability
Understanding the P95/P99 Latency Principle: Why the Slowest Requests Matter Most

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