centos 7 mysql 5.7修改my.cnf配置不生效问

mysql5.7默认lower_case_table_names=1，event_scheduler=OFF
原来的my.cnf在/etc/目录下，当修改lower_case_table_names=1和开启数据库事件event_scheduler=ON后，

use mysql;
show variables like "%table_names%";
show variables like "%event%";

查询结果依然还是
lower_case_table_names=1，event_scheduler=OFF

解决办法是
把配置文件复制到mysql安装目录的根目录，当前机器目录是/usr/local/
于是：
cp /etc/my.cng /usr/local/mysql/my.cnf
进入目录之后文件列表

[root@---------    home]# cd /usr/local/mysql/
[root@---------   mysql]# ll
total 60
drwxr-xr-x  2  7161 wheel  4096 Feb  2  2016 bin
-rw-r--r--  1  7161 wheel 17987 Feb  2  2016 COPYING
drwxr-xr-x 20 mysql mysql  4096 Sep 17 16:17 data
drwxr-xr-x  2  7161 wheel  4096 Feb  2  2016 docs
drwxr-xr-x  3  7161 wheel  4096 Feb  2  2016 include
drwxr-xr-x  5  7161 wheel  4096 Feb  2  2016 lib
drwxr-xr-x  4  7161 wheel  4096 Feb  2  2016 man
-rwxr-xr-x  1 root  root     76 Sep 17 16:17 my.cnf
-rw-r--r--  1  7161 wheel  2478 Feb  2  2016 README
drwxr-xr-x 28  7161 wheel  4096 Feb  2  2016 share
drwxr-xr-x  2  7161 wheel  4096 Feb  2  2016 support-files

my.cnf文件内容为：

[mysqld]
#mysql新配置文件
event_scheduler=ON
lower_case_table_names=1

再次查询，修改已经生效