Dabaoshi

Jul 31, 2026 · Fundamentals

Understanding JVM GC Algorithms and the Generational Model

This article explains the three fundamental garbage‑collection algorithms (Mark‑Sweep, Copying, Mark‑Compact), the three generational hypotheses, the structure and rules of the young generation, the distinctions among Minor, Major and Full GCs, and how remembered sets and card tables efficiently handle cross‑generation references in the JVM.