下边这段话主要描写了innodb如何来保障可恢复,和减少fsync的数量的
12.5.14.1. InnoDB Disk I/OInnoDB uses simulated asynchronous disk I/O: InnoDB creates a number of threads to take care of I/O operations, such as read-ahead. There are two read-ahead heurist...
mysql5.1的新特性
真是多啊。所有都了解的话,都不知道要测试到什么时候。1.5.1. What's New in MySQL 5.1 The following features have been added to MySQL 5.1. Partitioning. This capa...
DB更改logbin目录后,DR会不正常,需要重新change master
080204 16:02:24 Error reading packet from server: Could not find first log file name in binary log index file (server_errno=1236)080204 16:02:24 Got fatal error 1236: 'Could not find first...
ITIL中英文对照
ITIL中英文对照ITIL术语中英文对照表Absorbed overhead 可分摊间接费用Absorption costing 吸收成本法,完全成本法Acceptance 验收Acceptance environment 验收环境Acceptance test 验收测试Access contro...
mysql char_length和length
没想到mysql这个竟然是否分开的。length是按照字节算。char_length才是按字符算的。我记得一起pg似乎只有一个length。不过也好,我现在就关心length。LENGTH(str)返回值为字符串str的长度,单位为...
How Logs Work On MySQL With InnoDB Tables
(转一下,以后还得再读读)How Logs Work On MySQL With InnoDB Tables (Page 1 of 4 )Every wondered how MySQL logs transactions etc with the InnoDB table type? In this article Peter teaches us everything we...
今天担心了一下,change master会将relay-log重置的
mysql> show slave status;+--------------+-------------+-------------+---------------+------------------+---------------------+-----------------+---------------+-----------------------+------------...
mysql 的myisam和innodb对应的cache管理方式的一点差异
myisam只有一个key_buffer,也就是这个引擎仅仅自己管理index的cache,而数据的cache则完全依赖于os cache,而innodb的buffer是管理index和obj data的这个引申到一个问题就是大的内存的好处,就是linux里边那个os c...