The MySQL configuration file in the Windows operating system is "my.ini", which is generally located in the root directory of the MySql installation, or may be under the hidden folder "ProgramData"; while the MySQL configuration file in the Linux operating system The file is "my.cnf", and its location is generally in the "/etc/my.cnf" or "/etc/mysql/my.cnf" directory.
The operating environment of this tutorial: linux7.3&&windows7 system, mysql8 version, Dell G3 computer.
The configuration file of MySQL in Windows operating system is my.ini; the configuration file of MySQL in Linux operating system is my.cnf.
Generally, my.ini is in the root directory of the MySql installation, or it may be under the hidden folder "ProgramData".
Generally, my.cnf is in the /etc/my.cnf or /etc/mysql/my.cnf directory
my.ini configuration file
my.ini is the default configuration file used by MySQL. Under normal circumstances, MySQL can be configured as long as the contents in the my.ini configuration file are modified.
In addition to the directories introduced above, there may be several configuration files with the suffix .ini in the MySQL installation directory. Different configuration files represent different meanings.
my.ini is the default configuration file used by MySQL. Other configuration files are templates for configuration files suitable for different databases. The suitable database type is indicated in the file name. Here are the following: Configuration files are explained in detail.
my-huge.ini: Configuration file suitable for very large databases.
my-large.ini: Configuration file suitable for large databases.
my-medium.ini: Configuration file suitable for medium-sized databases.
my-small.ini: Configuration file suitable for small databases.
my-template.ini: It is the template of the configuration file. The MySQL Configuration Wizard writes the selected items in the configuration file to the my.ini file.
my-innodb-heavy-4G.ini: Indicates that this configuration file is only valid for the InnoDB storage engine, and the server's memory cannot be less than 4GB.
For the convenience of readers, we have omitted the comments in the my.ini file. The specific meanings of the parameters in my.ini are introduced separately below. The file content is as follows:
The above shows the parameters of the client. [client] and [mysql] are both clients. The parameter descriptions are as follows:
port: Indicates the port number used by the MySQL client to connect to the server. The default port number is 3306. If you need to change the port number, you can modify it directly here.
default-character-set: Indicates the default character set of the MySQL client.
The above are the parameters of the server. The parameter description is shown in the following table:
Parameter name
Description
port
represents the port number of the MySQL server
basedir
represents the port number of MySQL The installation path
datadir
represents the storage location of MySQL data files and the storage location of the data table
##default-character -set
Indicates the default character set on the server side
default-storage-engine
The default storage engine used when creating a data table
sql-mode
Indicates the parameter of SQL mode. Through this parameter, you can set the strictness of checking SQL statements
##max_connections
indicates the maximum number of connections allowed to access the MySQL server at the same time. One of the connections is reserved and is reserved for administrators only.
query_cache_size
represents the cache size during query. The cache can store previously queried data through the SELECT statement. information, you can directly take out the information from the cache when querying again, which can improve query efficiency
table_open_cache
Indicates the total number of tables opened by all processes
tmp_table_size
Indicates the maximum size allowed for each temporary table in memory
thread_cache_size
Indicates the maximum number of threads for the cache
myisam_max_sort_file_size
Indicates the maximum temporary file size allowed when MySQL rebuilds the index
myisam_sort_buffer_size
Indicates the cache size when rebuilding the index
key_buffer_size
Indicates the cache size of keywords
read_buffer_size
Indicates the cache size of the MyISAM table full table scan
read_rnd_buffer_size
Indicates that the sorted data is stored in the cache
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