将上面获取到的表名写入一个文件,如optimiz_table.tables 写个脚本来循环跑 #!/bin/bash set -eux set -o pipefail table_file='optimize_table.tables' log_file='optimize_table.log' while read line do sql="optimize table $line" echo "`date +"%F %T"`: begin $sql" | tee -a "$log_file...
AI代码解释 LOCKTABLEinventoryWRITESELECTquantityFROMinventoryWHEREItem='book';...UPDATEinventorySETQuantity=11WHEREItem='book';UNLOCKTABLES 这里,我们用一个select语句取出初始数据,通过一些计算,用update语句将新值更新到表中。包含有WRITE关键字的LOCKTABLE语句可以保证在UNLOCKTABLES命令被执行之前,不会有其它的访问...
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 ...
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 ...
Optimizing MySQL tables is a crucial step in improving the performance and efficiency of your database. By employing effective optimization techniques, you can enhance query execution speed, reduce storage requirements, and optimize resource utilization. This article explores various strategies and best ...
REBUILD INDEX) 年度执行OPTIMIZE TABLE 十一、MySQL 8.0+新特性应用 JSON类型优化: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 CREATE TABLE logs ( id INT, json_data JSON ) ENGINE=InnoDB; SELECT * FROM logs WHERE JSON_CONTAINS_PATH(json_data, 'one', '$.user'); 窗口函数优化:...
concurrent_insert设置2,总是允许并发插入,但是要定期OPTIMIZE TABLE整理空间碎片;视情况设置写优先级;视情况设置写内存,解决批量插入数据(如新闻系统更新)场景中。 行级锁:引擎InnoDB,模式包含 共享锁(S),排它锁(X),意向共享锁(IS),意向排它锁(IX)如果一个事务请求的锁模式与当前的锁兼容,innoDB就将请求的锁授...
optimize table:优化表,同时支持MyISAM和InnoDB表。回收删除操作造成的空洞,比如回收索引。 repair table:修复表,支持 MyISAM,ARCHIVE以及CSV 表。 1.1 定期分析表和检查表 定期分析与检查主要有两个关键命令: analyze:分析表,analyze table table_name; check:检查表,check table table_name; 分析(analyze)表语法:...
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 a table contains enough unutilized space, you should optimize that...
4. Defrag All Tables or All Databases If you want to optimize all the tables in a particular MySQL database, use the following command. The following command will optimize all the tables located in thegeekstuff database. mysqlcheck -o thegeekstuff -u root -pMySQLSecretPwd99 ...