Linux下MySQL安装配置 MySQL配置参数详解,在linux下配置mysql的朋友可以参考下。
一、下载编译安装#cd /usr/local/src/
#wget http://mysql.byungsoo.net/Downloads/MySQL-5.1/mysql-5.1.38.tar.gz
#tar –xzvf mysql-5.1.38.tar.gz ../software/
#./configure
--prefix=/usr/local/mysql //MySQL安装目录
--datadir=/mydata //数据库存放目录
--with-charset=utf8 //使用UTF8格式
--with-extra-charsets=complex //安装所有的扩展字符集
--enable-thread-safe-client //启用客户端安全线程
--with-big-tables //启用大表
--with-ssl //使用SSL加密
--with-embedded-server //编译成embedded MySQL library (libmysqld.a),
--enable-local-infile //允许从本地导入数据
--enable-assembler //汇编x86的普通操作符,可以提高性能
--with-plugins=innobase //数据库插件
--with-plugins=partition //分表功能,将一个大表分割成多个小表
#make && make install //编译然后安装
二、新建用户和组
#groupadd mysql //建MySQL组
#useradd -g mysql -s /sbin/nologin mysql //建MySQL用户属于MySQL组
三、配置
#chown -R mysql:mysql /usr/local/mysql/ 把MySQL目录的权限给MySQL用户和组
#cp /usr/local/src/software/ mysql-5.1.38/support-files/my-medium.cnf /etc/my.cnf //拷入配置文件my.cnf
#/usr/local/mysql/bin/mysql_install_db --user=mysql //用MySQL来初始化数据库
#chown -R mysql:mysql /usr/local/mysql/var/ //把初始化的数据库目录给MySQL所有者
#/usr/local/mysql/bin/mysqld_safe --user=mysql & //启动MySQL
四、其他
#cp /usr/local/src/software/ mysql-5.1.38/support-files/mysql.server /etc/init.d/mysqld
#chmod 755 /etc/init.d/mysqld
#chkconfig --add mysqld
#chkconfig mysqld on
#service mysqld restart
五、登陆测试
#cd /usr/local/mysql/bin
#mysql
>show databases;
#
MySQL安装结束
linux下mysql配置方法
在linux中mysql的配置文件路径在/usr/share/mysql下
有:my-huge.cnf 、my-large.cnf、 my-medium、my-small.cnf这些文件
根据需要打开这些文件中的一个:
在文件中找到[mysqld]
在下这行下加入datadir=FILEPATH /*这个路径为数据库存放的路径*/
然后保存文件
在shell中输入
#cp my-***.cnf /etc
#cd /etc
#mv my.cnf my.cnf.bak /*把系统以前的mysql配置文件备份*/
#mv my-***.cnf my.cnf
#service mysqld start /*启动mysql服务*/
#ntsysv /*配置mysql自启动,在弹出的窗口中把mysqld这项服务用空格选中,最后确定保存*/

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Indexes in MySQL are an ordered structure of one or more columns in a database table, used to speed up data retrieval. 1) Indexes improve query speed by reducing the amount of scanned data. 2) B-Tree index uses a balanced tree structure, which is suitable for range query and sorting. 3) Use CREATEINDEX statements to create indexes, such as CREATEINDEXidx_customer_idONorders(customer_id). 4) Composite indexes can optimize multi-column queries, such as CREATEINDEXidx_customer_orderONorders(customer_id,order_date). 5) Use EXPLAIN to analyze query plans and avoid

Using transactions in MySQL ensures data consistency. 1) Start the transaction through STARTTRANSACTION, and then execute SQL operations and submit it with COMMIT or ROLLBACK. 2) Use SAVEPOINT to set a save point to allow partial rollback. 3) Performance optimization suggestions include shortening transaction time, avoiding large-scale queries and using isolation levels reasonably.

Scenarios where PostgreSQL is chosen instead of MySQL include: 1) complex queries and advanced SQL functions, 2) strict data integrity and ACID compliance, 3) advanced spatial functions are required, and 4) high performance is required when processing large data sets. PostgreSQL performs well in these aspects and is suitable for projects that require complex data processing and high data integrity.

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How to effectively monitor MySQL performance? Use tools such as mysqladmin, SHOWGLOBALSTATUS, PerconaMonitoring and Management (PMM), and MySQL EnterpriseMonitor. 1. Use mysqladmin to view the number of connections. 2. Use SHOWGLOBALSTATUS to view the query number. 3.PMM provides detailed performance data and graphical interface. 4.MySQLEnterpriseMonitor provides rich monitoring functions and alarm mechanisms.

The difference between MySQL and SQLServer is: 1) MySQL is open source and suitable for web and embedded systems, 2) SQLServer is a commercial product of Microsoft and is suitable for enterprise-level applications. There are significant differences between the two in storage engine, performance optimization and application scenarios. When choosing, you need to consider project size and future scalability.

In enterprise-level application scenarios that require high availability, advanced security and good integration, SQLServer should be chosen instead of MySQL. 1) SQLServer provides enterprise-level features such as high availability and advanced security. 2) It is closely integrated with Microsoft ecosystems such as VisualStudio and PowerBI. 3) SQLServer performs excellent in performance optimization and supports memory-optimized tables and column storage indexes.


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