edit user.conf and system.conf
added this line to /etc/systemd/user.conf and /etc/systemd/system.conf
DefaultLimitNOFILE=65536
Change /etc/security/limits.conf
* hard nofile 65536
* soft nofile 65536
edit /etc/pam.d/common-session
added this line to /etc/pam.d/common-session and /etc/pam.d/common-session-noninteractive:
session required pam_limits.so