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PostgreSQL Scaling: What OpenAI Proved Wrong at 800M Users

Posted on by Sanjeeva Kumar

By Sanjeeva Kumar | Senior Oracle DBA & Database ArchitectPublished: February 2026 | Reading time: 8 minutes The Scaling Advice That’s Costing You Millions OpenAI is running 800 million ChatGPT users on unsharded PostgreSQL. One primary writer per cluster. 50+ read replicas. No Cassandra. No sharding. Just PostgreSQL — properly governed. Sound familiar? It shouldn’t. Read more about PostgreSQL Scaling: What OpenAI Proved Wrong at 800M Users[…]

Architecture comparison showing complex specialized vector database setup versus simple PostgreSQL pgvector unified solution for AI workloads

Do You Actually Need a Vector Database? Probably Not

Posted on by Sanjeeva Kumar

Last Updated: December 2025 | By Sanjeeva Kumar | 20+ Years in Database Systems The Plot Twist Nobody Saw Coming Two weeks ago, PostgreSQL’s pgvector extension released version 0.8.0. Within days, the entire vector database market collectively held its breath. Why? Because that “old guard” relational database just made billion-dollar vector database startups look like Read more about Do You Actually Need a Vector Database? Probably Not[…]

PostgreSQL Configuration Parameters: Essential Settings Guide

Posted on by Sanjeeva Kumar

Understanding PostgreSQL Configuration Parameters PostgreSQL’s default configuration rarely fits production workloads. Whether you’re managing a small application database or an enterprise data warehouse, knowing which PostgreSQL configuration parameters to adjust can mean the difference between sub-second queries and application timeouts. In this guide, we’ll cover the essential PostgreSQL configuration parameters that directly impact performance, with Read more about PostgreSQL Configuration Parameters: Essential Settings Guide[…]