安装5.5依赖安装包
代码如下
yum install -y autoconf* automake* zlib* libxml* ncurses-devel* libgcrypt* libtool* openssl*
安装cmake
代码如下
yum install -y cmake
在升级前,建议先将之前5.1的mysql及数据库目录备份一下
停止掉mysql
代码如下
service mysql stop
升级mysql 5.5.36
代码如下
http://download.csdn.net/download/cike121272604/6943279 tar xf mysql-5.5.36.tar.gz cd mysql-5.5.36 cmake -DCMAKE_INSTALL_PREFIX=/usr/local/mysql -DSYSCONFDIR=/etc -DMYSQL_DATADIR=/usr/local/mysql/var -DMYSQL_TCP_PORT=3306 -DMYSQL_UNIX_ADDR=/tmp/mysqld.sock -DMYSQL_USER=mysql -DEXTRA_CHARSETS=all -DWITH_READLINE=1 -DWITH_SSL=system -DWITH_EMBEDDED_SERVER=1 -DENABLED_LOCAL_INFILE=1 -DWITH_INNOBASE_STORAGE_ENGINE=1 make && make install
删除/etc/下的my.cnf配置文件
代码如下
rm -rf /etc/my.cnf
拷贝5.5的配置文件
代码如下
cp support-files/my-huge.cnf /etc/my.cnf
尝试启动一下
代码如下
service mysql start
执行更新程序并重启mysql
代码如下
/usr/local/mysql/bin/mysql_upgrade
如果一路OK就没事儿,但要是出了错误,请参考我另外一篇文章 mysql5.5升级过程中mysql_upgrade失败的问题
查看下现在的mysql版本
代码如下
cat mysql_upgrade_info
好了,升级工作完成。
再附升级失败问题解决
在升级mysql5.5过程中,执行/usr/local/mysql/bin/mysql_upgrade
提示:
代码如下
Looking for 'mysql' in: /usr/local/mysql/bin/mysql Looking for 'mysqlcheck' in: /usr/local/mysql/bin/mysqlcheck Running 'mysqlcheck'... /usr/local/mysql/bin/mysqlcheck: Got error: 1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FOR UPGRADE' at line 1 when executing 'CHECK TABLE ... FOR UPGRADE' FATAL ERROR: Upgrade failed
想起之前5.1好像是有密码的!这儿换种方式尝试
代码如下
/usr/local/mysql/bin/mysql_upgrade -S /var/data/mysql.sock -uroot -p
这个也不行了,突然想到出奇招,还是使用5.5的二进制程序,然后更改启动参数,因为我只想要把data目录下的表结构升级而已,必须指定的参数只是data目录,于是我做了如下尝试
# 启用 --skip-grant-tables参数避开检查,先启动再说
代码如下
/usr/local/mysql/bin/mysqld --datadir=/usr/local/mysql/var/ --user=mysql --skip-grant-tables &
# 看上去成功了
# 中间报了一些innodb的错误,不去理会,应该是配置或是这个半阴半阳状态下问题,这个以后再解决
# 接下来停止这个服务 mysqladmin shutdown 之,然后以正常参数启动mysqld服务…… 修改些my.cnf中的配置参数,以适合mysql5.5
一句话总结:
代码如下
/usr/local/mysql/bin/mysqld --datadir=/usr/local/mysql/var/ --user=mysql --skip-grant-tables &
以上就是Mysql5升级到Mysql5.5的方法_MySQL的内容,更多相关内容请关注PHP中文网(www.php.cn)!

InnoDBBufferPool reduces disk I/O by caching data and indexing pages, improving database performance. Its working principle includes: 1. Data reading: Read data from BufferPool; 2. Data writing: After modifying the data, write to BufferPool and refresh it to disk regularly; 3. Cache management: Use the LRU algorithm to manage cache pages; 4. Reading mechanism: Load adjacent data pages in advance. By sizing the BufferPool and using multiple instances, database performance can be optimized.

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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