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Oct 7, 2025 · Operations

How I Cut API Response Time from 500 ms to 100 ms with Linux Tuning

This article recounts a two‑week Linux system tuning project that reduced a high‑traffic API’s P99 response time from over 500 ms to under 100 ms by systematically diagnosing bottlenecks, applying USE‑based analysis, and tuning kernel, network, file‑descriptor, memory, CPU, and I/O parameters.