In my case, the file did not exist. In MySQL Workbench I went to OPTIONS FILE and found some default values. I clicked apply. It asked for permission. It then created the my.cnf file under /etc. However, it is very important to keep in mind that the first time you click "apply", you do not make any changes to the default configuration. Once the file has been created, you can make changes which will be applied when you click "apply". Otherwise you will not be shown the apply button when you make changes.

In my case, the file did not exist. In MySQL Workbench I went to OPTIONS FILE and found some default values. I clicked apply. It asked for permission. It then created the my.cnf file under /etc. However, it is very important to keep in mind that the first time you click "apply", you do not make any changes to the default configuration. Once the file has been created, you can make changes which will be applied when you click "apply". Otherwise you will not be shown the apply button when you make changes.

我在macOS Sierra上安装了MySql 5.7.12

支持文件位于

/usr/local/opt/mysql/support-files

只要将my-default.cnf复制到/etc/my.cnf或/etc/mysql/my.cnf，重新启动时配置就会被拾取。

打开终端，使用以下命令:

sudo find / -name my.cnf

MySQL 5.7 on Mac OS X El Capitan: /usr/local/mysql/etc/my.cnf

从/usr/local/mysql/support-files/my-default.cnf拷贝default conf文件

阅读文档!

您所使用的版本的MySQL文档将有所帮助。 它通常被描述为选项文件或MySQL配置文件。 文档中有这些文件的位置，以及其他重要信息，如位置和配置文件必须看起来像什么小例子。

MySQL版本8

MySQL 5.7版本

MySQL 5.6版本

MySQL 5.5版本

MySQL 5.6日文

重要提示:

在Unix平台上，MySQL忽略全局可写的配置文件。 这是有意为之的安全措施。

换句话说，如果你在配置文件上设置了错误的权限，就不会加载。

一个配置文件的初始设置权限示例:

RIZZOMBP$ ls -lah /etc/my.cnf
-rw-r--r--  1 myusername  wheel     0B Feb 25 20:40 /etc/my.cnf

注意:

可以在选项文件中使用!include指令来包含其他选项文件，并使用!includedir来搜索特定目录中的选项文件..... .．.MySQL不保证目录中选项文件被读取的顺序… 在Unix操作系统上使用!includedir指令找到并包含的任何文件的文件名必须以.cnf结尾。在Windows上，这个指令检查扩展名为.ini或.cnf的文件。

如何找到你的配置或日志文件等位置的例子:

SQL

这将不会显示配置文件，但将帮助您定位安装文件/文件夹。

MySQL版本5.7 & 8+

SELECT * FROM PERFORMANCE_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_VALUE LIKE '%\/%';

MySQL版本<= 5.6

SELECT * FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_VALUE LIKE '%\/%';

壳牌公司-终端

RIZZOMBP$ mysql --help | grep "Default options" -A 1

Default options are read from the following files in the given order:
/etc/my.cnf /etc/mysql/my.cnf /usr/local/mysql/etc/my.cnf ~/.my.cnf

以上命令归功于:Erwin Mayer来自ServerFault

RIZZOMBP$ mysqld --verbose --help | grep '/my.cnf' -B 1

Default options are read from the following files in the given order:
/etc/my.cnf /etc/mysql/my.cnf /usr/local/mysql/etc/my.cnf ~/.my.cnf

OR

RIZZOMBP$ ps aux | grep -i mysqld | grep -v $USER

_mysql 106 0.4 2.5 4232336 422112 ?? Ss 7:01PM 0:57.12
/usr/local/mysql/bin/mysqld
--user=_mysql
--basedir=/usr/local/mysql
--datadir=/usr/local/mysql/data
--plugin-dir=/usr/local/mysql/lib/plugin
--log-error=/usr/local/mysql/data/mysqld.local.err
--pid-file=/usr/local/mysql/data/mysqld.local.pid
--keyring-file-data=/usr/local/mysql/keyring/keyring
--early-plugin-load=keyring_file=keyring_file.so

示例文件

如果您需要详细的参考样本my.cnf:

https://gist.github.com/search?utf8=%E2%9C%93&q=my.cnf+mysql&ref=searchresults https://www.linode.com/community/questions/5749/mysql-sample-config-files https://www.fromdual.com/mysql-configuration-file-sample

没有归属/关联的URL

我的系统:

RIZZOMBP$ sw_vers
ProductName:    Mac OS X
ProductVersion: 10.14.3
BuildVersion:   18D109

RIZZOMBP$ mysql -V
mysql  Ver 8.0.15 for macos10.14 on x86_64 (MySQL Community Server - GPL)

RIZZOMBP$ mysqld -V
/usr/local/mysql-8.0.15-macos10.14-x86_64/bin/mysqld 
Ver 8.0.15 for macos10.14 on x86_64 (MySQL Community Server - GPL)