Nginx Benchmarks After CentOS Linux Kernel Page Table Isolation Fixes
Most recent Linux Kernel updates have been to address Meltdown & Spectre vulnerabilities. The first Linux Kernel patch update was to address Meltdown and reportedly it can result in between 5–30% performance overhead while others report it at 5–20%. I decided to do my own tests on CentOS 7.4 64bit OVH dedicated server running Centmin Mod 123.09beta01 branch LEMP stack with Nginx 1.13.8 to see how the updated CentOS 7.4 3.10.0–693.11.6 Linux Kernel impacted Nginx static file serving performance with PTI enaabled vs PTI disabled (no Retpoline Kernel fixes are available in CentOS Linux Kernel as yet).
Full results here.