Understanding the Java Virtual Machine: Memory Management

Understanding Java Garbage Collection (GC) is essential for building high-performance applications. This course dives deep into the inner workings of the Java Virtual Machine (JVM), focusing on how garbage collection manages memory and impacts application performance.

You'll gain a comprehensive understanding of:

• Young Generation vs. Old Generation: Learn about the different memory areas within the JVM and how objects are categorized.
• Eden and Survivor Spaces: Explore the movement of objects between Eden and survivor spaces within the young generation.
• Memory Promotion: Discover how objects are promoted from the young generation into the old generation.
• Different Java Garbage Collectors: A detailed examination of various GC algorithms, including:
  • Serial Collector: Understand its single-threaded approach.
  • Parallel Collector: Explore its multi-threaded execution for faster collection.
  • CMS (Concurrent Mark Sweep) Collector: Learn about its attempt to minimize pause times.
  • G1 (Garbage-First) Collector: Discover how it prioritizes memory regions for efficient collection.
• Card Tables: Explore how card tables optimize memory management in the old generation.
• GC Monitoring Tools: Master the use of tools like jstat and VisualVM to monitor garbage collection activity and identify performance bottlenecks.
• Soft, Weak, and Phantom References: Learn how to use these special reference types to control object lifetime and avoid memory leaks.
• ReferenceQueue & WeakHashMap: Understand how to leverage ReferenceQueue and WeakHashMap for efficient memory management with weak references.

By mastering these concepts, you'll be equipped to write more efficient Java applications and optimize their performance through effective garbage collection strategies. This course provides practical knowledge to improve your Java development skills and create robust, scalable applications.