Os Memory Management Questions
The working set page replacement algorithm is a memory management technique used in operating systems. It aims to minimize page faults by keeping track of the working set of each process. The working set represents the set of pages that a process is actively using at any given time.
In this algorithm, each process is assigned a fixed number of page frames. When a page fault occurs, the operating system checks if the requested page is within the working set of the process. If it is, the page is brought into memory. However, if the requested page is not within the working set, the operating system selects a victim page to be replaced.
The victim page is chosen based on various criteria, such as the page that has not been accessed for the longest time or the page that is least likely to be accessed in the future. The selected victim page is then replaced with the requested page.
By focusing on the working set of each process, the working set page replacement algorithm aims to reduce the number of page faults and improve overall system performance.