Young generation collects frequently; old generation collects less often.
In Java's Generational Garbage Collection, the young generation is where new objects are allocated and collected frequently, as most objects become unreachable quickly. The old generation, also known as tenured, holds objects that have survived multiple collections and is collected less often. This separation allows the JVM to efficiently manage memory by focusing on areas with the most garbage, reducing the overall impact on performance.
Additional Notes
How do ‘young’ and ‘old’ generations function in Java’s GC?