Bin's Tech Cabin

Apr 1, 2024 · Fundamentals

Why System.gc Matters for Java NIO Memory Management

This article explains how Java's System.gc triggers full or concurrent garbage collection in NIO scenarios, detailing the JVM's handling of out‑of‑memory errors during memory‑mapped file operations and direct buffer allocations, and examines the behavior across various garbage collectors such as Serial, Parallel, G1, ZGC, and Shenandoah.