innodb-online-ddl

Posted by 夏泽民

https://dev.mysql.com/doc/refman/5.6/en/innodb-online-ddl-operations.html



OPTIMIZE

Posted by 夏泽民

当DELETE后面跟条件的时候,则就会出现这个问题



HSP_HDR IBUF_BITMAP、INODE、XDES

Posted by 夏泽民

对于InnoDB表空间来说,表空间是有多个区组成的。其中的每个区都由物理位置上连续的64个页组成,因为每个页的大小为16K,所以一个区的大小是1M。



mysql ALGORITHM

Posted by 夏泽民

由于MySQL 5.6引入了在线DDL,因此ALTER TABLE命令可以选择指定ALGORITHM = INPLACE或ALGORITHM = COPY. overview of online DDL指出,默认情况下,尽可能使用INPLACE,并暗示(没有说明)INPLACE算法比COPY算法便宜.



mysql 行的存储格式

Posted by 夏泽民

https://juejin.cn/book/6844733769996304392/section/6844733770042441736



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