Hi, What does a 'cat /proc/PID/limits' (replace PID with the NGINX PID number) show you ? The limits.conf file does not apply to systemd services. Edit the file /lib/systemd/system/nginx.service and within the '' section the following: LimitNOFILE=65536 After that run: systemctl daemon-reload && systemctl restart nginx Wesleyby Sernate - Nginx Mailing List - English