转载.节选于https://dev.mysql.com/doc/refman/8.0/en/innodb-tables.html 1.InnoDB Architecture The following diagram shows in-memory and on-disk structures that comprise the InnoDB storage engine architecture. This section covers topics related to InnoDB tab…

测试了两个case,属于之前blog的遗留问题: innodb如何加载数据字典 flush tables都做了什么操作 先来看下innodb加载数据字典: 首次使用:select * from tt; 1. 创建handler对象 函数调用栈: open_binary_frm get_new_handler innobase_create_handler ha_innobase::ha_innobase 根据单实例 handlerton + table_share两个参数,创建了handler对…

转自 http://www.cnblogs.com/panfeng412/archive/2011/08/16/2140364.html MySQL有多种存储引擎,MyISAM和InnoDB是其中常用的两种.这里介绍关于这两种引擎的一些基本概念(非深入介绍). MyISAM是MySQL的默认存储引擎,基于传统的ISAM类型,支持全文搜索,但不是事务安全的,而且不支持外键.每张MyISAM表存放在三个文件中:frm 文件存放表格定义:数据文件是MYD (MYData):索引文件是MYI (MYIn…

早就听说lock tables和unlock tables这两个命令,从字面也大体知道,前者的作用是锁定表,后者的作用是解除锁定.但是具体如何用,怎么用,不太清楚.今天详细研究了下,总算搞明白了2者的用法. lock tables 命令是为当前线程锁定表.这里有2种类型的锁定,一种是读锁定,用命令 lock tables tablename read;另外一种是写锁定,用命令lock tables tablename write.下边分别介绍: 1. lock table 读锁定 如果一个线程获…

原文地址:https://stackoverflow.com/questions/47680213/what-are-the-current-differences-between-myisam-and-innodb-storage-engines-speci Your assumption that MyISAM has been receiving new development is not correct. MyISAM is not receiving any significant…

14.2 InnoDB Concepts and Architecture 14.2.1 MySQL and the ACID Model 14.2.2 InnoDB Multi-Versioning 14.2.3 InnoDB Redo Log 14.2.4 InnoDB Undo Logs 14.2.5 InnoDB Table and Index Structures 14.2.6 InnoDB Mutex and Read/Write Lock Implementation The in…

  Preface       There're many ways in backing up or migrating data from one server to another one.Logically,we can use mysqldump,mydumper,mypump to do that kind of job.Physically,we can use Xtrabackup even cold copy way.What I'm gonna introduce is a…

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…

14.5 InnoDB Tablespace Management   14.5.1 Resizing the InnoDB System Tablespace 14.5.2 Changing the Number or Size of InnoDB Redo Log Files 14.5.3 Using Raw Disk Partitions for the System Tablespace 14.5.4 InnoDB File-Per-Table Tablespaces 14.5.5 Cr…

Mysql优化(出自官方文档) - 第十篇(优化InnoDB表篇) 目录 Mysql优化(出自官方文档) - 第十篇(优化InnoDB表篇) 1 Optimizing Storage Layout for InnoDB Tables 2 Optimizing InnoDB Transaction Management 3 Optimizing InnoDB Transaction Management 4 Optimizing InnoDB Redo Logging 5 Bulk Data Lo…