dbaplus Community

Mar 18, 2024 · Databases

Why MySQL Auto‑Increment IDs Aren’t Always Sequential (And How to Optimize Them)

Understanding MySQL’s auto‑increment mechanism reveals why IDs can become non‑sequential due to storage differences, transaction rollbacks, unique key conflicts, and batch inserts, and shows how lock‑mode settings and MySQL 8.0 improvements can optimize performance and maintain consistency.