小红花·文摘

InnoDB的Buffer Pool机制通过维护LRU、Free和Flush三种列表来管理内存中的数据页。调整innodb_buffer_pool_size至物理内存的80%可能导致TPS下降，因为flush列表无法跟上脏页生成速度。Buffer Pool分为young和old区，优化全表扫描时的热页管理。监控应关注命中率、脏页比例和flush列表长度，以避免性能瓶颈。

【MySQL InnoDB 内核】Buffer Pool 与 LRU：frame、flush 列表与 young/old 分区

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