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MySQL延迟问题和数据刷盘策略-王伟
source link: https://blog.51cto.com/wangwei007/2416148
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一、MySQL复制流程官方文档流程图如下：1、绝对的延时，相对的同步2、纯写操作，线上标准配置下，从库压力大于主库，最起码从库有relaylog的写入。二、MySQL延迟问题分析1、主库DML请求频繁原因：主库并发写入数据，而从库为单线程应用日志，很容易造成relaylog堆积，产生延迟。解决思路：做sharding，打散写请求。考虑升级到MySQL5.7+，开启基于逻辑时钟的并行复制。2、主库执
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