Index Performance

Architecture Digest

Apr 11, 2025 · Databases

Performance Issues of Using UUID as Primary Key in MySQL and Optimization Strategies

The article explains why using UUIDs as primary keys in MySQL large tables leads to poor index efficiency, slower inserts and queries, and costly index refreshes on updates, and then presents practical optimization techniques such as ordered UUIDs, binary storage, hybrid auto‑increment keys, and table partitioning.