OpenAI is running ChatGPT and its API platform — serving around 800 million users — on a single primary PostgreSQL instance. Not a distributed SQL cluster, not a heavily sharded fleet, but one write primary with nearly 50 read replicas… Read More »Inside OpenAI’s PostgreSQL Strategy: Scaling a Single Primary to 800 Million Users
Introduction: Why PostgreSQL Logical Replication Slots Matter for CDC When I started building change data capture (CDC) pipelines on PostgreSQL, the hardest part wasn’t decoding the data itself – it was making the pipeline reliable. Keeping track of exactly which… Read More »How to Build a Robust PostgreSQL Logical Replication Slot Pipeline
Introduction: Why PostgreSQL EXPLAIN ANALYZE Needs Better Tools When I started digging into slow PostgreSQL queries, I quickly realized that PostgreSQL EXPLAIN ANALYZE is both a superpower and a headache. It shows exactly how the planner executes a query, where… Read More »Top 7 Best Tools to Read PostgreSQL EXPLAIN ANALYZE Like a Pro
Introduction: Why pg_upgrade Matters for PostgreSQL 17 Major upgrades are one of those moments where a PostgreSQL environment either proves its maturity or exposes every shortcut you ever took. With PostgreSQL 17 on the horizon, I treat the upgrade strategy… Read More »How to Safely Use pg_upgrade for PostgreSQL 17 Major Upgrades
Introduction: Why Row Level Security Matters for Multi-Tenant SaaS When I build a multi-tenant SaaS, the first non‑negotiable requirement is strict tenant isolation. Every query, every API endpoint, and every admin tool has to guarantee that one customer can never… Read More »How to Implement PostgreSQL Row Level Security for Multi-Tenant SaaS
Introduction: Why Oracle to PostgreSQL Migration Strategies Matter in 2025 In 2025, I’m seeing more teams seriously reevaluate long‑running Oracle estates and actively plan a move to PostgreSQL. It’s no longer just a cost conversation; it’s a strategic decision about… Read More »Top 7 Oracle to PostgreSQL Migration Strategies That Actually Work
Introduction: Why PostgreSQL Backup Methods Matter Whenever I’m called in to help with a broken PostgreSQL database, the same question comes up first: “Do we have a backup?” The harsh truth is that even a perfectly tuned PostgreSQL server is… Read More »How to Choose and Use PostgreSQL Backup Methods (Step-by-Step Guide)
Introduction: Why PostgreSQL Migrations Go Wrong So Often Every time I help a team move to PostgreSQL from MySQL, MongoDB, SQL Server, or another engine, I see the same pattern: people underestimate how different PostgreSQL really is. On paper, it… Read More »Top 7 PostgreSQL Migration Mistakes Developers Regret Later
Introduction Modern applications are expected to be always on. Users don’t care about maintenance windows, hardware failures, or network hiccups—they just expect your app to work. Because so many apps rely on PostgreSQL as their primary data store, PostgreSQL high… Read More »The Essential PostgreSQL High Availability Guide for Modern Apps
Introduction If you’ve ever felt curious — or even a little intimidated — by the massive PostgreSQL codebase, you’re not alone. But don’t worry! This guide is here to give you a gentle, beginner-friendly introduction to the PostgreSQL source code… Read More »A Warm Welcome to the PostgreSQL Source Code!
Introduction This post introduces the fundamentals of PostgreSQL’s data page (block) mechanism and how data retrieval works from a high-level perspective (Relative to PostgreSQL version 16). Understanding physical data storage and access methods, you will gain valuable insight into the… Read More »PostgreSQL Page Structure & Scan Methods Explained Now
Introduction Curious what really powers PostgreSQL behind the scenes? This post exposes core PostgreSQL architecture and storage paradigm that drive its reliability and performance. From backend processes to storage structure and table spaces, we will walk you through all of these pieces and show… Read More »PostgreSQL Architecture and Storage Paradigm Exposed Now