This comprehensive guide explores the principles of virtual memory in operating systems, focusing on demand paging, page fault handling, and various page replacement algorithms like FIFO, LRU, Aging, Second-Chance, and Working Set. It analyzes the mechanics and trade-offs of each approach, as well as performance factors like memory allocation, thrashing, and optimal page size determination.

A comprehensive technical guide to Operating System memory management. This article explores the abstraction of physical RAM into logical address spaces, detailing program relocation, contiguous memory allocation algorithms (First Fit, Next Fit), the 50% Rule for fragmentation, and modern techniques like paging, segmentation, and their combination for efficient memory utilization and security.