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MySQL逻辑模块工作配合

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Jun 07, 2016 pm 03:01 PM

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欢迎进入Linux社区论坛，与200万技术人员互动交流 >>进入启动MySQL 1、初始化模块执行存储引擎初期化执行 2、1中执行完成后 ----连接管理模块接手 3、连接管理模块启动处理客户端连接请求的监听程序（tcp/ip 网络监听、unix 的socket） 4、启动完成、准备接

欢迎进入Linux社区论坛，与200万技术人员互动交流 >>进入

　　启动MySQL

　　1、初始化模块执行&&存储引擎初期化执行

　　2、1中执行完成后 ---->连接管理模块接手

　　3、连接管理模块启动处理客户端连接请求的监听程序（tcp/ip 网络监听、unix 的socket）

　　4、启动完成、准备接收请求

　　客户端连接

　　5、监听到客户端的连接请求（运用网络交互模块中相关功能）---->通过Client & Server 交互协议模块协议----通讯匹配---->

　　6、连接管理模块----请求转发---->线程管理模块----控制转交---->连接线程模块

　　7、连接线程模块----调用---->用户模块进行授权检查----通过---->线程池请求线程

　　不通过---->返回

　　请求query

　　8、开启日志的情况下，日志会同步产生

　　query类型请求（调用Parser（Query 解析和转发模块））---->（访问控制模块同步执行）

　　---->Query 解析器

　　---->（select 类型）调用查询缓存模块---->检查query cache 中是否已经存在---->存在将cache 中的数据返回给连接线程模块

　　不存在传回query 解析器（Query 优化器模块）

　　---->（DML 或者DDL）给表变更管理模块

　　---->表维护模块（更新统计信息、检测、修复和整理类的query）

　　---->复制模块（复制相关的query）

　　---->状态收集报告模块（请求状态的query）

　　---->insert 处理器

　　---->delete处理器

　　---->update 处理器

　　---->create 处理器

　　---->alter 处理器

　　command类型请求---->直接执行（不需要调用Parser）

　　9、以上执行完成---->连接线程模块---->返回执行结果

MySQL逻辑模块工作配合

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