MySQL

MySQL itself supports slow query logging, which can be configured to log queries that exceed a specific time in SQL queries. This is a very effective tool in optimizing SQL queries to help us quickly locate the SQL that has the problem.　　Variables

With regard to the benefits of MySQL indexing, if the correct design and use of the indexed MySQL is a Lamborghini, then no design and use of the index of MySQL is a human tricycle. For tables that do not have an index, a single-table query might be

1. Use database_name;2. Set names UTF8; (or other required encoding)3. Source example.sql (SQL file storage path)MySQL installation directoryDatabase directory/var/lib/mysql/Configuration file/usr/share/mysql (mysql.server command and configuration

Show Processlist shows which threads are running. You can also use the Mysqladmin processlist statement to get this information. If you have super privileges, you can see all the threads. Otherwise, you can only see your own thread (that is, the

ToolsMysqlMysqldumpapplication Example ExportExport a full library backup to a local directorymysqldump-u$user-p$passwd-h127.0.0.1-p3306--routines--default-character-set=utf8--lock-all-tables-- Add-drop-database-a > Db.all.sql Export the specified

Three machines ready:192.168.220.129 (Master)192.168.220.143 (slave)192.168.220.144 (proxy)Make sure that MySQL (5.6.29) is installed on all three machinesMY.CNF ConfigurationMaster [MYSQLD1]basedir =/usr/localmysqldatadir =/data/mysqlport =

Let's look at the following execution results:(Root@localhost)[(None)]Mysql>Show variables like 'character%';+--------------------------+-------------------------------------------------------------+|Variable_name|Value|+--------------------------+--

1) Start:Sudo/etc/init.d/mysql start2) Stop:Sudo/etc/init.d/mysql stop3) Reboot:Sudo/etc/init.d/mysql restart4) View log:Cat/var/log/mysql.errCat/var/log/mysql/error.log5) not supported in ChineseChange/ETC/MYSQL/MY.CNFAdd the following in

Mysql-mmm is the MySQL master Replication Manager that implements the following functions:High Availability ( VIP Floating technology similar to keepalived)Only one database write operation is provided at the same time to ensure database consistency.

MySQL's website: http://www.mysql.com/downloads/There will be several versions of the selection in this download screen.1. MySQL Community Server Community version, open source is free, but does not provide official technical support.2. MySQL

This article mainly explains the installation and use of MySQL in Ubuntu, as well as the installation and use of MySQL Workbench. MySQL is an open source database software, a product of Oracle, is a good performance database software. MySQL

Localtimestamp () LocaltimestampThese date-time functions are equivalent to now (). Since the now () function is short and easy to remember, it is recommended that you always use now () instead of the functions listed above.1.2 Get the current date +

1.windows IIS +ftp Installation"Start"--"control Panel"--"Add or Remove Programs"Click on "Add/Remove Windows Components (a)" When the following interface appearsThe following interface appearsSelect "Application Server"Click "Details" in the

Because of the JavaScript language async feature, callback functions are used when using node. js to perform many operations, including accessing the database. If the business logic in the code is a little more complicated, and the callback layer is

Start MySQL Error:[[email protected] ~]#/etc/init.d/mysqld startSocket File/tmp/mysql_slave.sock exists. is another MySQL daemon already running with the same UNIX socket?Cause multiple MySQL processes use the same socket.Two ways to solve:The first

For some reason, it's time to install MySQL in the Ubuntu system, which has been installed many times before. It's not written down.has been used to install the source code package, based on two reasons: 1. Always write code in Python. 2. Want to

DDL statement -- modify a table Modifying a table is to modify the definition of an existing table in the database. It is simple to modify a table because it does not need to reload data or affect ongoing services. MySQL uses the alter table

Mysql master-slave replication and mysql master-slave ReplicationMysql master-slave replication step 1) download MySQL (Ubuntu) sudo apt-get install mysql-server mysql-client2) Change mysql configuration file vi/etc/mysql/my. the cnf modification

Install and configure MySQLMTOP to monitor MySQL running performance, I. Environment Description1. Server role 2. System EnvironmentCentOS 6.2 x86_64 3. environment requirements(1) MySQL 5.0 and above (used to store data collected by the Monitoring

High-load Mysql troubleshooting and mysql troubleshooting Troubleshooting of Mysql high load Problems Found The top command checks the server load and finds that mysql has 200% of the cpu, which causes the high load of Mysql. It is estimated that