To optimize MySQL tables, it's essential to analyze and refine the table structure and design. This involves choosing the right data types for columns and normalizing the database schema. Advertisement - This is a modal window. No compatible source was found for this media. Choosing the Right...
'.',table_name), table_schema,table_name,ENGINE, sum(data_length/1024/1024) as data_mb , sum(index_length/1024/1024) as index_mb, sum((data_length+index_length)/1024/1024) as all_mb, sum(table_rows) from information_schema.tables where table_schema not in('mysql','performance_sche...
如果及时整理一下,查询效率会高出好多。 DELIMITER $$DROPPROCEDUREIFEXISTS`mysql`.`sp_optimize_tables`$$CREATEPROCEDURE`mysql`.`sp_optimize_tables`(INdb_namevarchar(255))BEGIN--Created by david yeung 20080128.--To optimize all the tables in exact database.declarecntintdefault0;declareiintdefault0...
When Should You Optimize MySQL Tables? Tables where information in a database continually updates, such astransactional databases, are the most likely candidates for optimization. However, optimizing large tables takes longer, and it locks tables. Locking a table for several hours may disrupt system ...
NULL type: ALL possible_keys: NULL key: NULL key_len: NULL ref: NULL rows: 16086 filtered: 100.00 Extra: Usingtemporary 1 row in set, 1 warning (0.00 sec) 2.3 优化嵌套查询、分页查询 2.3.1 嵌套查询 你可以找到内容:8.2.1 Optimizing SELECT Statements MySQL4.1中开始支持SQL子查询。
Optimize All Tables Using Windows Command Line: -- Syntax: mysqlcheck -o your_database_name -u username -pPasswordmysqlcheck-o test-u root-p Optimize All Tables Using Ubuntu Terminal: -- if you are signed in as a superusermysqlcheck-o test-u root-p-- if you are not signed in as ...
mysqlcheck -o --all-databases -u root -pMySQLSecretPwd99 5. After Optimization After the optimization, using the following query, check the total-size and unused-space-size for the three tables that we optimized in this example. mysql> use thegeekstuff; ...
How to find tables for optimization Though you should periodically optimize all the tables in your MySQL database, if you have to make a choice between the tables to optimize, you can try to see the space that the table has occupied but not utilized to store records. In other words, if...
http://stackoverflow.com/questions/5474662/mysql-optimize-all-tables $ mysqlcheck -u root -p -o dbname In MariaDB you will see: ... note : Table does not support optimize, doing recreate + analyze instead status : OK information for the result above is below. Basically, InnoDB (the sto...
MYSQL 5.7 到底 OPTIMIZE Table 塞不塞 DML 问题的起因是另外某篇文字中,对于optimize table 理解不深,说出optimize table 时会和 vacuum full 一样阻塞表的DML操作,马上就有好友指出,你说的不对,并拿出evidence. 所以借此篇,1来证明optimize table 不阻塞DML 2 表示对好友lmongo的感谢, 有一个能指出你错误,并...