使用MySQL 5.7.24版本的安装文件替换MySQL 5.7.19版本的安装文件,数据库复制频繁中断,查看error日志发现下面错误: [Warning] InnoDB: Table mysql/innodb_index_stats has length mismatch in the column name table_name. Please run mysql_upgrade 解决办法: 在MySQL服务正常运行的状态下,使用mysql_upgrade命令进行处理: mysql_upg…

压缩用一点CPU换取磁盘IO.内存空间.磁盘空间. 在有Secondary Indexes 的表中,使用压缩更加明显,相关索引数据也会压缩. InnoDB 表压缩 对表压缩只需要在Create Table 时指定ROW_FORMAT=Compressed即可. 压缩的行格式不适用于InnoDB 系统表空间,这也可能就是为什么@@innodb_default_row_format不能指定为compressed的原因吧. key_block_size 选项:指定磁盘上Table 的Page Size…

参考:http://www.jb51.net/article/66951.htm 用5.7版本启动原5.5实例后,再用5.5启动出现以下报错 InnoDB: Error: checksum mismatch in data file /data/mysql/ibdata1 :: InnoDB: Could not open or create data files. :: InnoDB: If you tried to add new data files, and it failed here…

mysql数据库1005错误解决方法 MySQL Error Number 1005 Can’t create table ‘.\mydb\#sql-328_45.frm’ (errno: 150) MySQL Error Number 1005Can’t create table ‘.\mydb\#sql-328_45.frm’ (errno: 150) If you get this error while trying to create a foreign key, it can be…

14.7 InnoDB Table Compression 14.7.1 Overview of Table Compression 14.7.2 Enabling Compression for a Table 14.7.3 Tuning Compression for InnoDB Tables 14.7.4 Monitoring Compression at Runtime 14.7.5 How Compression Works for InnoDB Tables 14.7.6 Comp…

14.6 InnoDB Table Management 14.6.1 Creating InnoDB Tables 14.6.2 Moving or Copying InnoDB Tables to Another Machine 14.6.3 Grouping DML Operations with Transactions 14.6.4 Converting Tables from MyISAM to InnoDB 14.6.5 AUTO_INCREMENT Handling in Inn…

今天有开发反应他的建表语句错误,我看了下,提示: MySQL Error 1170 (42000): BLOB/TEXT Column Used in Key Specification Without a Key Length 原因是: MySQL不允许在BLOB/TEXT,TINYBLOB, MEDIUMBLOB, LONGBLOB, TINYTEXT, MEDIUMTEXT, LONGTEXT,VARCHAR建索引,因为前面那些列类型都是可变长的,MySQL无法保证列的唯一性,只能在BLO…

在mysql 中建立引用约束的时候会出现MySQL ERROR 1005: Can't create table (errno: 150)的错误信息结果是不能建立 引用约束. 出现问题的大致情况 1.外键的引用类型不一样,主键是int外键是char 2.找不到主表中 引用的列 3.主键和外键的字符编码不一致 4.还有要建立外键的话,要先建立索引.没有建立索引也会出错.…

MySql Error: Can't update table in stored function/trigger because it is already used by statement which invoked this stored function/trigger I am running a MySQL Query. But when a new row is added from form input I get this error: Error:Can't update…

Error code:1728 Cannot load from mysql.proc. The table is probably corrupted http://bugs.mysql.com/bug.php? id=50183 原因是mysql.proc 在5.1 comment char(64) -> 5.5 comment text 导致 The difference seen in the mysql.proc table is 5.5 <   `comment` text CHA…