@cooolman do you have this file on your system `/lib/systemd/system/mysqld.service` ?
I'm not sure why but if you boot with systemd you are supposed to set the limits in service file first: LimitNOFILE=infinity LimitMEMLOCK=infinity After that mysqld service will be allowed to open more connection ( as per your setting in my.cnf ) On my system `/lib/systemd/system/mysqld.service` is missing. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1434758 Title: mysqld: errno: 24 - Too many open files To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mysql-5.6/+bug/1434758/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs