Story
Scaling PostgreSQL to power 800M ChatGPT users
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Overview
PostgreSQL has been a key data system for ChatGPT and OpenAI's API, supporting a user base that has grown to 800 million. The database load has increased by over 10 times in the past year, necessitating advancements in production infrastructure to meet rising demands.
Summary from openai.com.
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Community reactions
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Based on 5 sampled comments from this thread. Analyzed 2026-01-23.
- Praise: PostgreSQL's ability to scale effectively for 800M ChatGPT users demonstrates its robustness, making it a reliable choice for large-scale applications.
- Praise: The implementation of nearly 50 read replicas while maintaining low replication lag showcases advanced architectural strategies that enhance performance.
- Praise: PostgreSQL's flexibility allows companies to grow significantly without immediate architectural changes, which is a major advantage for startups and growing businesses.
- Concern: The reliance on a single writer for scaling raises concerns about potential bottlenecks, indicating limitations in the architecture under heavy load.
- Concern: Questions about replication lag and handling stragglers suggest that there may be challenges in maintaining performance consistency with such a large number of replicas.
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