In order to better optimize MySQL in high concurrency, it is necessary to understand the locking table mechanism when MySQL query is updated.I. OverviewMySQL has three levels of Lock: page level, table level, row level.MyISAM and MemoryStorageThe
MySQL table sharding Methods: MySQL
I. Let me explain why Table sharding is required.
When a piece of data reaches several millions, it takes more time for you to query the data at a time. If there is a joint query, I think it may die there. The
Periodic analysis Table
ANALYZE [Local | No_write_to_binlog] TABLE tbl_name [, Tbl_name]
Use this statement to parse and store the keyword distribution for a table. During profiling, a table is locked with a read lock. This is useful for MyISAM,
mysql| Data | Database Ideally, MySQL has been running smoothly since the first installation. Sometimes, however, problems can occur for a variety of reasons, ranging from power outages to hardware failures to abnormally shutting down MySQL servers (
MySQL常用指令,java,php程序员,数据库工程师必备。程序员小冰常用资料整理MySQL common commands (for reference)The most common display commands are:1. Display the list of databases.show databases;2. Display the data table in the library:Use MySQL;Show tables;3, display the
1. Full backup and incremental backup 1.1 full-scale backupFull-volume data is all the data in the database, and a full backup is the backup of all the data in the database.Back Up all libraries:mysqldump -uroot -p123456 -S /data/3306/mysql.sock -F -
The following error occurs in the MySQL log file. crash does not occur in the MySQL table. It is generally caused by stopping MySQL when the database is updated.Check table syntaxCheck table tbl_name [, tbl_name]... [option]...Option = {QUICK | FAST
1. download MySql
1. download MySql
Open http://www.mysql.com/downloads/mysql/#downloads download in browser
My downloaded version is Red Hat 5 version of http://www.mysql.com/downloads/mirror.php? Id = 407552
Upload the file to the server, or
Periodic analysis TableANALYZE [LOCAL | No_write_to_binlog] TABLE tbl_name [, Tbl_name]This statement is used to analyze and store the keyword distribution of a table. During parsing, the table is locked with a read lock. This is useful for MyISAM,
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