Stop using UUID v4 as your database primary key

📰 Dev.to · Mike Knights

Learn why using UUID v4 as a primary key in relational databases can be problematic and what alternatives to consider

intermediate Published 8 May 2026
Action Steps
  1. Assess your current database schema to identify potential issues with UUID v4 primary keys
  2. Evaluate alternative primary key options such as auto-incrementing integers or custom UUIDs
  3. Configure your database to use a more suitable primary key type
  4. Test and benchmark the performance of your database with the new primary key configuration
  5. Apply indexing and partitioning strategies to optimize query performance
Who Needs to Know This

Database administrators, software engineers, and data architects can benefit from understanding the implications of using UUID v4 as a primary key to optimize database performance and design

Key Insight

💡 UUID v4 can lead to poor query performance and fragmentation due to its random nature, consider alternative primary key types for optimal database design

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💡 Ditch UUID v4 as your primary key for better database performance!

Key Takeaways

Learn why using UUID v4 as a primary key in relational databases can be problematic and what alternatives to consider

Full Article

If you are using UUID v4 as a primary key in a relational database, you are likely causing...
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