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
The above is the detailed content of What is the configuration file of mysql. For more information, please follow other related articles on the PHP Chinese website!
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.
MySQL's position in databases and programming is very important. It is an open source relational database management system that is widely used in various application scenarios. 1) MySQL provides efficient data storage, organization and retrieval functions, supporting Web, mobile and enterprise-level systems. 2) It uses a client-server architecture, supports multiple storage engines and index optimization. 3) Basic usages include creating tables and inserting data, and advanced usages involve multi-table JOINs and complex queries. 4) Frequently asked questions such as SQL syntax errors and performance issues can be debugged through the EXPLAIN command and slow query log. 5) Performance optimization methods include rational use of indexes, optimized query and use of caches. Best practices include using transactions and PreparedStatemen
MySQL is chosen for its performance, reliability, ease of use, and community support. 1.MySQL provides efficient data storage and retrieval functions, supporting multiple data types and advanced query operations. 2. Adopt client-server architecture and multiple storage engines to support transaction and query optimization. 3. Easy to use, supports a variety of operating systems and programming languages. 4. Have strong community support and provide rich resources and solutions.
Apache connects to a database requires the following steps: Install the database driver. Configure the web.xml file to create a connection pool. Create a JDBC data source and specify the connection settings. Use the JDBC API to access the database from Java code, including getting connections, creating statements, binding parameters, executing queries or updates, and processing results.
The process of starting MySQL in Docker consists of the following steps: Pull the MySQL image to create and start the container, set the root user password, and map the port verification connection Create the database and the user grants all permissions to the database
The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.
Laravel is a PHP framework for easy building of web applications. It provides a range of powerful features including: Installation: Install the Laravel CLI globally with Composer and create applications in the project directory. Routing: Define the relationship between the URL and the handler in routes/web.php. View: Create a view in resources/views to render the application's interface. Database Integration: Provides out-of-the-box integration with databases such as MySQL and uses migration to create and modify tables. Model and Controller: The model represents the database entity and the controller processes HTTP requests.
The key to installing MySQL elegantly is to add the official MySQL repository. The specific steps are as follows: Download the MySQL official GPG key to prevent phishing attacks. Add MySQL repository file: rpm -Uvh https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm Update yum repository cache: yum update installation MySQL: yum install mysql-server startup MySQL service: systemctl start mysqld set up booting
