Terminologies Used in Denamd Paging
Before we get into demand paging, let’s define some key terms:
- Paging: Paging is a memory management system that divides physical memory into fixed-size blocks known as “frames” and splits logical memory into fixed-size pieces known as “pages.”
- Page Table: An operating system-maintained data structure that matches logical pages to physical frames. It aids the CPU in converting virtual addresses to physical addresses.
- Virtual Memory: An abstraction that enables processes to use more memory than is physically available by combining RAM and secondary storage (often disk space).
- Page fault: When a process attempts to access a page that is not already in physical memory, a page fault occurs. This initiates a request to load the required page from the server.
Algorithms For Demand Paging in OS
The operating system is necessary for managing computer resources and using hardware efficiently. Memory management involves allocating and releasing memory for various programs and files and is one of the most important aspects of modern working. Operating systems use a variety of methods to provide efficient memory management; one of them is request pagination. In this article, we will learn what paging is in the business context, why it is important, and how it improves computer performance.
Demand paging is a memory management technique used in operating systems to manage the allocation of physical memory (RAM) to ongoing programs in an effective manner. It is a fundamental component of current operating systems that helps them to make the greatest use of available memory resources while decreasing the time it takes to access data from secondary storage, such as hard disks or SSDs.