JVM Memory Layout, Stack vs Heap & Garbage Collectors
Master JVM memory management: Stack memory, Heap generations, Metaspace, reference reachability, and modern low-latency GC (G1, ZGC).
Understanding of class loading and JVM runtime execution
Mastery of JVM heap generations, G1 and ZGC garbage collection tuning, and JDK Flight Recorder memory profiling.
Read in order, or jump to what you need.
Every lesson builds on the one before it. Open any lesson to read the explanation, run the examples, and try the practice challenges.
- 02.01JVM Memory Anatomy: Stack Frames, Heap & Metaspace4 min
Deconstruct JVM memory regions. Understand thread-private stacks, shared heap structures, Metaspace limits, and native method memory.
- 02.02Generational GC, G1, ZGC & Low-Latency Tuning4 min
Master modern garbage collection. Explore the Weak Generational Hypothesis, Young/Old generation scavenges, G1 regions, and the sub-millisecond ZGC collector.
- 02.03Strong, Weak, Soft & Phantom References: Preventing Memory Leaks4 min
Master Java reference reachability. Understand Strong, Soft, Weak, and Phantom references, and prevent classic enterprise memory leaks.
- 02.04JDK Flight Recorder, JFR Events, and Production Memory Profiling4 min
Diagnose production heap churn, thread allocation bottlenecks, and off-heap leaks using JDK Flight Recorder (JFR) and mission control diagnostics.
Ready to move on?
Analyze a heap dump and diagnose off-heap memory growth using Native Memory Tracking.
Open the module self-check