[MySQL] view MySQL configuration file path and related configuration

(1) For the configuration file path, sometimes I find that although I tried to modify some variables in the configuration file, they did not take effect. It was later discovered that the modified file was not the configuration file read by the MySQL server. If you do not know the path of the configuration file currently used by MySQL, you can view it as follows: the server first reads the etc

(1) For the configuration file path, sometimes I find that although I tried to modify some variables in the configuration file, they did not take effect. It was later discovered that the modified file was not the configuration file read by the MySQL server. If you do not know the path of the configuration file currently used by MySQL, you can view it as follows: the server first reads/etc

(1) about the configuration file path

Sometimes, although I tried to modify some variables in the configuration file, they did not take effect. It was later discovered that the modified file was not the configuration file read by the MySQL server.

If you do not know the path of the configuration file currently used by MySQL, try to view it as follows:

As you can see, the server first reads the/etc/my. cnf file. If the file does not exist, it tries to read it from the following paths.

(2) configuration item Segmentation

The configuration file my. cnf is usually divided into several parts, such as [client], [mysqld], and [mysql. MySQL programs generally read segments with the same name. For example, the server mysqld reads the configuration items under the [mysqld] segment. If the location of the configuration item is incorrect, the configuration will not take effect. For more information, see my. cnf.

(3) about global variables

In addition, if you want to view some global variable settings of MySQL, you can view mysqladmin variables-p without logon and permission,

This operation is equivalent to running the show global variables command during logon;