组提交与事务依赖跟踪
原文英文,约5100词,阅读约需19分钟。发表于: 。MySQL 8.0 and newer change and improve how we measure and monitor replication lag. Even though multi-threaded replication (MTR) has been on by default for the last three years (since v8.0.27...
MySQL 8.0引入多线程复制(MTR),改善复制延迟监控。通过二进制日志组提交(BGC)和事务依赖跟踪提高性能。组提交减少事务刷新次数,事务提交分为准备、同步和提交阶段,使用逻辑时钟和写集进行依赖跟踪。写集识别非冲突事务,实现更高并行性。MySQL 8.4移除部分系统变量,未来版本将使用WRITESET和LOGICAL_CLOCK。