IBM User Guide for Java V7 on Windows > IBM SDK for Java > The collector and the allocator > How to coexist with the Garbage Collector

Root set

The root set is an internally derived set of references to the contents of the stacks and registers of the JVM threads and other internal data structures at the time that the Garbage Collector was called.

This composition of the root set means that the graph of reachable objects that the Garbage Collector constructs in any given cycle is nearly always different from that traced in another cycle (see list item 5 in Garbage collection summary). This difference has significant consequences for finalizers (list item 7), which are described more fully in Finalizers.

Parent: How to coexist with the Garbage Collector

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