No HOT updates on JSONB (write amplification) performance impact

📰 Dev.to · Franck Pachot

Understand how PostgreSQL's MVCC handles in-place updates and its impact on JSONB performance

intermediate Published 31 May 2025
Action Steps
  1. Understand how MVCC works in PostgreSQL
  2. Analyze the impact of in-place updates on JSONB performance
  3. Consider using TOAST or other storage methods to reduce write amplification
  4. Test and benchmark JSONB update performance in your specific use case
  5. Optimize your database schema and queries to minimize the need for frequent updates
Who Needs to Know This

Database administrators and developers working with PostgreSQL can benefit from understanding how MVCC affects JSONB performance, especially when dealing with frequent updates

Key Insight

💡 PostgreSQL's MVCC can lead to write amplification, affecting JSONB performance

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Key Takeaways

Understand how PostgreSQL's MVCC handles in-place updates and its impact on JSONB performance

Full Article

PostgreSQL's Multi-Version Concurrency Control (MVCC) works around the challenge of in-place updates...
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