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Dify.AI

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

土法炼钢兴趣小组的博客
土法炼钢兴趣小组的博客 · 2026-06-18T00:00:00Z
阿赫桑·哈迪:PostgreSQL 18 RETURNING 子句增强:现代应用的游戏规则改变者

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。

阿赫桑·哈迪:PostgreSQL 18 RETURNING 子句增强:现代应用的游戏规则改变者

Planet PostgreSQL
Planet PostgreSQL · 2026-01-06T05:45:34Z

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。

Postgres 18:RETURNING子句中的OLD和NEW行

程序师
程序师 · 2025-09-27T01:41:17Z

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...

The OpenLampTech Developer Newsletter is One Year Old

Planet MySQL
Planet MySQL · 2022-11-16T12:00:00Z
Yifan is 4 Years Old

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...

Yifan is 4 Years Old

王建硕的博客
王建硕的博客 · 2011-06-02T13:52:15Z
Yifan is Three Years Old

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...

Yifan is Three Years Old

王建硕的博客
王建硕的博客 · 2010-06-02T15:39:37Z
Zhuazhou - Gift Picking at 1 Year Old

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...

Zhuazhou - Gift Picking at 1 Year Old

王建硕的博客
王建硕的博客 · 2008-06-03T15:17:53Z
Yifan is 3 Months Old

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...

Yifan is 3 Months Old

王建硕的博客
王建硕的博客 · 2007-09-01T15:46:38Z

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...

Partners, old and new

Neward & Asocciates, LLC Blog
Neward & Asocciates, LLC Blog · 2005-10-06T00:00:00Z
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