Scaling the LEMP Stack: Calculate Your Way to Optimal Performance

Default configurations for Nginx, PHP-FPM, and MySQL waste system resources and fail under production load, causing 502/504 errors and connection limits. This guide provides practical calculation methods to tune each component based on actual server resources, enabling stable performance at scale. By implementing systematic optimizations across the entire stack—from worker processes to buffer pool sizing—teams can eliminate common bottlenecks and ensure reliable concurrent request handling.