How We Scaled a 1 GB WordPress VPS Past 1,075,000 Requests Per Minute

Conventional wisdom claims WordPress requires massive horizontal clusters to survive viral traffic spikes. We proved that a single 1 vCPU, 1 GB RAM CentOS Stream 10 instance can sustain over 1,075,000 HTTPS requests per minute with zero errors and 11ms median latency.

1. Zero-Copy Kernel TLS (kTLS) + sendfile()

Traditional TLS termination copies HTML buffers between kernel space and user space multiple times. With Linux 6.12 tls kernel offload and OpenSSL 3.5 Options KTLS, Nginx hands file descriptors directly to the kernel socket layer—eliminating context switches under heavy concurrency.

2. Dual-Tier tmpfs RAM Cache + Pre-Compressed Gzip

Every anonymous page render is atomically written to a tmpfs RAM filesystem alongside a pre-compressed index.html.gz artifact. Nginx serves compressed payloads directly from RAM with zero PHP-FPM overhead and zero per-request CPU compression cost.