0 votes 0 votes In paging , giving more bits to the innermost table as compared to the outermost page table results in using less physical memory space. Is this statement true always? ankit3009 asked Jan 12, 2022 ankit3009 375 views answer comment Share Follow See all 7 Comments See all 7 7 Comments reply Show 4 previous comments palashbehra5 commented Jan 12, 2022 reply Follow Share It does, check the link again, it calculates total overhead with varying ‘a’. 1 votes 1 votes Zack Fair commented Jan 13, 2022 reply Follow Share palashbehra5 ,I am not able to follow this question properly, also I didn’t understand whether the final answer is “Yes” always true or “No” not always true.( Please do mention that ).Now about the question I got few questions?What does it mean by line “less physical memory space used” ?Does it mean the memory that would be used for entire page table ,through all levels likesize of outer level + total size of inner levelorDoes it mean the memory that would be used while accessing a particular page?size of outer level + size of single page of inner level?PS : Also in those graphs I changed few values ,is this correct ? and what does it imply? 2 votes 2 votes palashbehra5 commented Jan 13, 2022 reply Follow Share > I am not able to follow this question properly, also I didn’t understand whether the final answer is “Yes” always true or “No” not always true. ( Please do mention that ). Not always true, as more bits for the outer page table can lead to more overhead. > What does it mean by the line “less physical memory space used”? Memory overhead due to paging. https://courses.engr.illinois.edu/cs241/sp2014/lecture/09-VirtualMemory_II_sol.pdf > size of outer level + size of a single page of inner level? Yes, that's what I considered total overhead here, however, the inner page table need not be in kernel space all of the time, it can be swapped to disk. > is this correct? and what does it imply? I Believe your concern is despite having fewer bits in the outer level, why is the third case consuming more space? That could be due to the inner page table not being able to fit completely on a single page. I am still not completely sure. 1 votes 1 votes Please log in or register to add a comment.