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。
PostgreSQL 18 增强了 RETURNING 子句，特别是 MERGE RETURNING 功能，简化了应用架构并改善数据跟踪。新版本支持 OLD 和 NEW 别名，便于在 DML 操作中同时访问旧值和新值，提高了开发效率，降低了复杂性。
Postgres 18发布，新增RETURNING子句支持同时访问旧值(OLD)和新值(NEW)，简化了INSERT、UPDATE、DELETE和MERGE命令中新旧值的获取，提高了代码的可读性和实用性。
The OpenLampTech developer newsletter is one year old! I honestly don’t know where the past year went. Obviously, I had my nose buried in some fantastic content since OpenLampTech publishes mostly...
Haha! Yifan is 4 years today! The family celebrated the birthday for the young man. Happy Birthday, Yifan! In the last four years, Yifan brought so much joy to the family. I just realized that...
Happy birthday to Yifan. Little Yifan is 3 years old today, officially. We celebrated his birthday with his favorite cake, and brought him to his favorite playground. He really had a great...
One of the Chinese tradition for kid is Zhuazhou, or gift picking at 1 year old. Zhua = Grasp Zhou = 1 Year Old According to the tradition, child at exactly 1 year old (typically at birthday) will...
Tomorrow Yifan will be three months old. Here are his recent photos - I took it today. Wendy today created a flash movie for Yifan. Yifan now is so sweet, and his has lots of “favorite...
For many developers, it's been a while since they got together with their current programming environment. They've hit the 7-year-itch mark with their current language/platform partner. They find...
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