Full-page caching solves anonymous read traffic, but real-world WordPress applications also serve editors, API webhooks, and logged-in members. Optimizing the uncached critical path keeps tail latency rock-solid.
Eliminating TCP Loopback Overhead
Routing both Nginx-to-PHP-FPM and PHP-to-Valkey over Unix domain sockets (/run/php-fpm/www.sock and /run/valkey/valkey.sock) bypasses TCP/IP packet framing and ephemeral port exhaustion during cache rebuild storms.
Leave a Reply