growdu 技术·学习·实践·人生·哲学 2026-09-23T03:41:25.361Z https://growdu.cn/ growdu Hexo PostgreSQL libpq 机制与缓冲区详解 https://growdu.cn/2026/09/23/database/postgresql-libpq-mechanism/ 2026-09-23T11:34:29.000Z 2026-09-23T03:41:25.361Z <table> <thead> <tr> <th>编写人</th> <th>编写内容</th> <th>编写时间</th> </tr> </thead> <tbody><tr> <td>growdu</td> <td>初稿，结合 PostgreSQL 17 源码（src&#x2F PostgreSQL Latch 机制详解：从一行 SetLatch 到 epoll 的内核之旅 https://growdu.cn/2026/09/23/database/postgresql-latch-mechanism/ 2026-09-23T11:04:21.000Z 2026-09-23T03:41:25.330Z <table> <thead> <tr> <th>编写人</th> <th>编写内容</th> <th>编写时间</th> </tr> </thead> <tbody><tr> <td>growdu</td> <td>初稿，结合 PostgreSQL 17 源码（~&#x2F;c reorderbuffer.c 源码深度解析:PostgreSQL 逻辑复制的"事务重组引擎 https://growdu.cn/2026/09/17/db/postgresql/postgresql-reorder-buffer-code-analysis/ 2026-09-17T10:08:17.000Z 2026-09-23T03:41:31.024Z <h2 id="引言-为什么-reorder-buffer-是逻辑复制的核心"><a href="#引言-为什么-reorder-buffer-是逻辑复制的核心" class="headerlink" title="引言:为什么 reorder buffer 是逻辑复制的核心"> applyparallelworker.c 之 LA 端源码深度解析:Leader Apply Worker 的指挥中枢 https://growdu.cn/2026/09/16/db/postgresql/postgresql-apply-leader-worker-code-analysis/ 2026-09-16T18:45:04.000Z 2026-09-23T03:41:30.655Z <h2 id="引言-为什么需要单独分析-LA-端"><a href="#引言-为什么需要单独分析-LA-端" class="headerlink" title="引言:为什么需要单独分析 LA 端"></a>引言:为什么需要单独分析 LA 端</h2><p><code>appl applyparallelworker.c 源码深度解析:1646 行代码的完整结构与模块协作 https://growdu.cn/2026/09/16/db/postgresql/postgresql-apply-parallel-worker-code-analysis/ 2026-09-16T18:02:17.000Z 2026-09-23T03:41:30.491Z <blockquote> <p>配套源码:<code>~/cwork/postgresql</code>(基于 PG 18 主干)</p> <p>配套前文:</p> <ul> <li><a href="https://growdu.github.io/blog/db/postgr Linux CPU 绑核与 top 详解:从原理到实战 https://growdu.cn/2026/09/16/linux/cpu-affinity-top-guide/ 2026-09-16T17:41:39.000Z 2026-09-23T03:41:16.646Z <blockquote> <p>本文聚焦两个紧密相关的系统管理主题:</p> <ol> <li><strong>CPU 绑核(CPU Affinity)</strong>:如何让进程&#x2F;线程固定在某些 CPU 核上</li> <li><strong>top 工具实战</s Apply Parallel Worker 的 lock_stream 与 unlock_stream:为什么"获得就释放"的死锁防护机制 https://growdu.cn/2026/09/16/db/postgresql/postgresql-apply-parallel-lock-stream/ 2026-09-16T10:22:53.000Z 2026-09-23T03:41:30.456Z <blockquote> <p>配套源码:<code>~/cwork/postgresql</code>(基于 PG 18 主干)</p> <p>配套前文:</p> <ul> <li><a href="https://growdu.github.io/blog/db/postgr Injection Point 与 PG 测试框架集成实战:从 Makefile 到 .spec 完整链路 https://growdu.cn/2026/09/15/db/postgresql/postgresql-injection-points-test-framework/ 2026-09-15T11:00:31.000Z 2026-09-23T03:41:31.063Z <blockquote> <p>配套源码:<code>~/cwork/postgresql</code>(基于 PG 18 主干)</p> <p>配套前文:</p> <ul> <li><a href="https://growdu.github.io/blog/db/postgr 用 Injection Point 测试无法到达的代码路径:3 种改造模式 + 实战 https://growdu.cn/2026/09/15/db/postgresql/postgresql-injection-points-test-unreachable/ 2026-09-15T10:44:06.000Z 2026-09-23T03:41:30.721Z <blockquote> <p>配套源码:<code>~/cwork/postgresql</code>(基于 PG 18 主干)</p> <p>配套前文:<a href="https://growdu.github.io/blog/db/postgresql/postgresq PostgreSQL 18 Injection Point 完整指南:原理、API 与实战 https://growdu.cn/2026/09/15/db/postgresql/postgresql-injection-points/ 2026-09-15T10:25:50.000Z 2026-09-23T03:41:30.993Z <blockquote> <p>配套源码:<code>~/cwork/postgresql</code>(基于 PG 18 主干)</p> <p>本文聚焦 PG 18 引入的内核级 <strong>Injection Point 框架</strong>——一个让测试代码可以在 < PostgreSQL 18 流式逻辑复制发布端深度解析:从 logical_decoding_work_mem 到 stream_commit 的完整链路 https://growdu.cn/2026/09/14/db/postgresql/postgresql-logical-replication-stream-publisher/ 2026-09-14T16:24:21.000Z 2026-09-23T03:41:31.097Z <blockquote> <p>配套源码:<code>~/cwork/postgresql</code>(基于 PG 18 主干)</p> <p><strong>预设场景</strong>:</p> <ul> <li>发布端 PG 18,<code>wal_level=logic 从内核开发者视角,在 PostgreSQL 18 逻辑复制中新增一个 GUC 参数 https://growdu.cn/2026/09/14/db/postgresql/postgresql-logical-replication-add-guc/ 2026-09-14T10:13:07.000Z 2026-09-23T03:41:31.162Z <blockquote> <p>配套源码:<code>~/cwork/postgresql</code>(基于 PG 18 主干)</p> <p><strong>示例场景</strong>:Babelfish 兼容项目需要在逻辑复制 <strong>SQL Server 风格 D PostgreSQL 行锁机制深度解析:从 MVCC 到多级锁的完整链路 https://growdu.cn/2026/09/11/db/postgresql/postgresql-row-lock/ 2026-09-11T11:59:09.000Z 2026-09-23T03:41:31.132Z <blockquote> <p>配套源码:<code>~/cwork/postgresql</code>(基于 PG 18 主干)</p> <p>读完本文你会理解:</p> <ol> <li>PG 的行锁<strong>不是独立数据结构</strong>,而是建立在 MVCC 之 火焰图怎么看:从一张图到优化方向的完整方法论 https://growdu.cn/2026/09/11/db/performance/flame-graph-analysis/ 2026-09-11T11:51:10.000Z 2026-09-23T03:41:31.223Z <blockquote> <p>配套前文:<a href="https://growdu.github.io/blog/db/postgresql/postgresql-flame-graph/">PostgreSQL 逻辑复制性能分析:火焰图实战</a> —— 那一篇讲 PG PostgreSQL 逻辑复制 Apply Parallel Worker 参数调优实战 https://growdu.cn/2026/09/11/db/postgresql/postgresql-logical-replication-apply-parallel-tuning/ 2026-09-11T11:31:03.000Z 2026-09-23T03:41:30.689Z <blockquote> <p>配套源码:<code>~/cwork/postgresql</code>(基于 PG 18 主干)<br>配套前文:<a href="https://growdu.github.io/blog/db/postgresql/postgresql-ap PostgreSQL 逻辑复制 Apply Parallel Worker 运行机制深度解析 https://growdu.cn/2026/09/11/db/postgresql/postgresql-apply-parallel-worker/ 2026-09-11T10:42:09.000Z 2026-09-23T03:41:31.193Z <blockquote> <p><strong>源码基线</strong>:PostgreSQL 18(<code>src/backend/replication/logical/&#123;applyparallelworker,worker,launcher&#125;.c< AI 是你的杠杆 —— 普通人也能用的 AI 实战教程 https://growdu.cn/2026/09/08/ai/19_AI%E6%98%AF%E4%BD%A0%E7%9A%84%E6%9D%A0%E6%9D%86%E6%99%AE%E9%80%9A%E4%BA%BA%E4%B9%9F%E8%83%BD%E7%94%A8%E7%9A%84AI%E5%AE%9E%E6%88%98%E6%95%99%E7%A8%8B/ 2026-09-08T11:17:05.000Z 2026-09-23T03:41:18.680Z <blockquote> <p>这是一篇给”不写代码的普通人”的 AI 入门教程。看完就能上手,直接照抄 10 个 prompt 模板,马上见效。</p> </blockquote> <h2 id="一句话破除焦虑"><a href="#一句话破除焦虑" class="heade TWPA 依赖冲突检测设计文档 https://growdu.cn/2026/09/07/db/logical_decode/logical_parallel_apply/%E9%80%BB%E8%BE%91%E5%A4%8D%E5%88%B6%E5%B9%B6%E8%A1%8Capply%E4%BE%9D%E8%B5%96%E5%86%B2%E7%AA%81%E6%A3%80%E6%B5%8B%E8%AE%BE%E8%AE%A1%E6%96%87%E6%A1%A3/ 2026-09-07T17:16:11.000Z 2026-09-23T03:41:29.810Z <blockquote> <p><strong>文档版本</strong>:v1.0<br><strong>适配版本</strong>:PostgreSQL 18<br><strong>源码基线</strong>:<code>src/backend/replication/log 逻辑复制并行 Apply 用户接口文档 https://growdu.cn/2026/09/07/db/logical_decode/logical_parallel_apply/%E9%80%BB%E8%BE%91%E5%A4%8D%E5%88%B6%E5%B9%B6%E8%A1%8Capply%E6%8E%A5%E5%8F%A3%E6%96%87%E6%A1%A3/ 2026-09-07T17:16:11.000Z 2026-09-23T03:41:29.828Z <blockquote> <p><strong>文档版本</strong>:v1.0<br><strong>适配版本</strong>:PostgreSQL 18(含社区已合入的并行 Apply 增强补丁)<br><strong>源码基线</strong>:<code>src/b TWPA 概要设计文档 https://growdu.cn/2026/09/07/db/logical_decode/logical_parallel_apply/%E9%80%BB%E8%BE%91%E5%A4%8D%E5%88%B6%E5%B9%B6%E8%A1%8Capply%E6%A6%82%E8%A6%81%E8%AE%BE%E8%AE%A1%E6%96%87%E6%A1%A3/ 2026-09-07T17:16:11.000Z 2026-09-23T03:41:29.845Z <blockquote> <p><strong>文档版本</strong>:v1.0<br><strong>适配版本</strong>:PostgreSQL 18<br><strong>源码基线</strong>:<code>src/backend/replication/log