Virtual Memory Swapping and Cache Replacement Policies

How do operating systems decide which data to keep in fast memory and which to swap out to disk? Understanding virtual memory and cache management is crucial for writing high-performance software and designing efficient systems. This text-based course guides you through the foundational concepts of memory management, page replacement algorithms, and caching strategies. You will transition from a basic understanding of computer memory to confidently analyzing cache hit rates and predicting system performance under various workloads. What you'll learn: • Understand the core principles of virtual memory, paging, and address translation. • Analyze the mechanics of key page replacement algorithms including FIFO, LRU, and the optimal policy. • Calculate cache hit and miss rates manually using step-by-step workload traces. • Compare how different access patterns affect swapping behavior and system throughput. • Explore modern caching contexts, including SSD wear-leveling and multi-tier memory hierarchies. • Apply theoretical caching concepts to optimize application-level data structures. This course begins with essential terminology and fundamental memory architectures before walking you through practical, written examples of swapping policies in action. You will analyze real-world scenarios to see how different algorithms perform under stress. This course is designed for beginner programmers, computer science students, and systems enthusiasts who want a clear, conceptual introduction to memory management without needing advanced prerequisites. Start reading today to master the mechanics of virtual memory and write more cache-friendly code.