如果CHECK TABLE遇到损坏的页面,MySQL实例将退出以防止错误的传播(Bug #10132)。如果数据损坏发生在二级索引中,但表数据依然是可读的,运行CHECK TABLE仍将导致MySQL实例停止。 如果CHECK TABLE在主键索引中遇到错误的DB_TRX_ID或DB_ROLL_PTR项,CHECK TABLE将导致InnoDB访问到一个错误的undo log日志记录,导致MVCC相关服...
To check the sizes of all of your databases, at the mysql> prompt type the following command: SELECT table_schema AS"Database", ROUND(SUM(data_length + index_length)/1024/1024,2)AS"Size (MB)"FROM information_schema.TABLES GROUP BY table_schema; Copy NoteThis command may take a minute ...
To check the sizes of all of your databases, at the mysql> prompt type the following command: CopySELECT table_schema AS "Database", ROUND(SUM(data_length + index_length) / 1024 / 1024, 2) AS "Size (MB)" FROM information_schema.TABLES GROUP BY table_schema; Depending on how many ...
Store information in the .MYI file to indicate when the table was checked and whether the table crashed. This should be used to get full benefit of the --check-only-changed option, but you shouldn't use this option if the mysqld server is using the table and you are running it with ...
MySQL中check命令 mysql checksum原理,innochecksum是一个用于校验innodb表空间文件完整性的工具,这是一个官方自带的工具,关于它的介绍,可以查看MySQL官方文档,下文主要是通过innodb_ruby来对innochecksum--page-type-dump的结果进行解读。必须关闭mysqld进程,否则会
一、mysqlcheck MySQL mysqlcheck客户端主要用来检查(check)、修复(repair)、分析(analyze)、优化(optimize)表。使用mysqlcheck的好处是不需要停止服务器来检查或修复表,mysqlcheck为用户提供了一种方便的使用SQL语句CHECK TABLE、REPAIR TABLE、ANALYZE TABLE和OPTIMIZE TABLE的方式。
MySQL Forums Forum List » Newbie Advanced Search New Topic Re: how to check my tables' sizes?Posted by: grass grass Date: July 02, 2006 04:21PM Thanks! I tried, but how comes the number of rows showed is different from what I get from "select count(*) from tablename"?
Check Mysql Database Size SELECT ROUND( SUM(data_length + index_length) / 1024 / 1024 ) TOTAL_MB, ROUND(SUM(data_length) / 1024 / 1024) DATA_MB, ROUND( SUM(index_length) / 1024 /1024 ) INDEX_MB FROM information_schema.TABLES;...
Options that can be used with ndb_redo_log_reader are shown in the following table. Additional descriptions follow the table. Usagendb_redo_log_reader file_name [options] file_name is the name of a cluster redo log file. redo log files are located in the numbered directories under the dat...
For details about what this option entails, see Section 15.7.3.2, “CHECK TABLE Statement”. mysql_upgrade marks all checked and repaired tables with the current MySQL version number. This ensures that the next time you run mysql_upgrade with the same version of the server, it can be ...