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Java Architect Handbook
Java Architect Handbook
Nov 26, 2025 · Databases

Why UUID Primary Keys Slow Down MySQL and How to Optimize Them

This article explains the performance drawbacks of using UUIDs as primary keys in MySQL—including larger indexes, random inserts, and slower comparisons—details why data updates trigger index refreshes, and offers practical optimization techniques such as ordered UUIDs, binary storage, hybrid auto‑increment keys, and table partitioning.

Binary StorageDatabase PerformanceIndex Optimization
0 likes · 8 min read
Why UUID Primary Keys Slow Down MySQL and How to Optimize Them
Senior Brother's Insights
Senior Brother's Insights
Nov 4, 2025 · Databases

Why Using UUIDs as MySQL Primary Keys Can Hurt Performance—and How to Fix It

UUIDs provide globally unique identifiers useful in distributed systems, but using them as MySQL primary keys can degrade insert speed, increase storage, and cause page splits; this article explains UUID versions, their structures, performance impacts, and best‑practice techniques such as binary storage, ordered UUIDs, and alternative ID schemes.

Binary StorageMySQLUUID
0 likes · 11 min read
Why Using UUIDs as MySQL Primary Keys Can Hurt Performance—and How to Fix It