Linux | Too many open files

With systemd: /etc/systemd/system.conf DefaultLimitNOFILE=128000 You are a lucky admin who is NOT running systemd: /etc/security/limits.conf * soft nofile 128000 * hard nofile 128000 * hard noproc 128000 * soft noproc 128000 root soft nofile 128000 root hard nofile 128000 Check with # ulimit -n