Lost connection to MySQL server at 'reading authorization pa
1.进入Mysqld 如果已经设置Mysql/Bin环境变量,直接在CMD里输入命令,如果没有设置Mysql环境变量,去Mysql安装目录的Bin文件夹里运行 F:\AppServ\MySQL\bin\mysql.exe -u root -p 其中root是用户名,然后就可以进入Mysql命令行环境了 2.以后的每一句Mysql命
1.进入Mysqld
如果已经设置Mysql/Bin环境变量,直接在CMD里输入命令,如果没有设置Mysql环境变量,去Mysql安装目录的Bin文件夹里运行
F:\AppServ\MySQL\bin\mysql.exe -u root -p
其中root是用户名,然后就可以进入Mysql命令行环境了
2.以后的每一句Mysql命令,每次都要以分号;为结束标识,而不是以回车。
3.注意,,每次都需要重启Mysql才可以使设置生效!!
当然了,如果你直接在Mysql安装目录的 my.ini加上设置值,则可以在Mysql启动时加载设置。比如connect_timeout = 120
然后是需要更改什么参数解决这个问题
当WEB服务器负载高的时候,经常会出现这种错误,
原因:
MySQL默认connect_timeout是5秒,超过了这个时间MySQL的server端就会返回“Bad handshake”。
解决办法:
1.大多数时候设置"set global connect_timeout=60;"是可以解决问题的;
我们可以通过执行“SHOWSTATUS LIKE 'aborted%'”,可以观察到 Variable_name Value
Aborted_clients 6
Aborted_connects 15010
觉得是否要增加connect_timeout的时间,"Aborted_connects"将会随着服务端放弃客户端初始连接而增加。如果"Aborted_connects"很大,并且不断增加,就需要增加"connect_timeout".
2.在MySQL的配置文件中[mysqld]添加"skip-name-resolve",减少域名解析的时间
3.部署服务器端的网络要好,至少大于100Mbps/s
4.如果是在调用mysql_query的时候出现的问题,那就需要把"net_read_timeout"的时间调成30秒,或者60秒,或者更大的值
5.如果还不能解决问题,那估计是你的SQL语句中含有BLOB这种大类型,我们就需要增加"max_allowed_packet"的值了

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Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

MySQL is worth learning because it is a powerful open source database management system suitable for data storage, management and analysis. 1) MySQL is a relational database that uses SQL to operate data and is suitable for structured data management. 2) The SQL language is the key to interacting with MySQL and supports CRUD operations. 3) The working principle of MySQL includes client/server architecture, storage engine and query optimizer. 4) Basic usage includes creating databases and tables, and advanced usage involves joining tables using JOIN. 5) Common errors include syntax errors and permission issues, and debugging skills include checking syntax and using EXPLAIN commands. 6) Performance optimization involves the use of indexes, optimization of SQL statements and regular maintenance of databases.

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA


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