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功能介绍
针对于频繁更新或秒杀类等业务场景，大幅度优化对于热点行数据的 update 操作性能。当开启热点更新自动探测时，系统会自动探测是否有单行的热点更新，如果有，则会让大量的并发 update 排队执行，以减少由于大量行锁造成的并发性能下降。
支持版本
内核版本 TDSQL-C MySQL 版 5.7 2.0.23/2.1.9 及以上。
内核版本 TDSQL-C MySQL 版 8.0 3.1.5 及以上。
适用场景
适用于单点或多点带主键的更新压力非常大的场景（秒杀场景）。
参数说明
参数名
动态
类型
默认
参数值范围
说明
cdb_sql_filter_enable 
yes
bool
off
on/off
是否打开热点更新功能
使用说明
﻿热点更新保护﻿
﻿

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