As we know segmented paging is an improvement over segmentation and paging but I am having some doubts regarding the memory overhead of these three system.It is clear that segmentation need less memory overhead.But about other two system please confirm these two points.
number of pages in pure paging=number of pages in segmented paging
In pure paging we have a single page table for each process but in segmentation we have page table for each segment.so I think that after all total number of pages in pure paging is equal to Segmented paging.is this true?
memory overhead is larger in segmented paging than pure paging
as the number of pages are same,thus total memory requirements will be same but in paging we have a fixed size single page table so some amount of internal fragmention will be there but as in segmented paging there are various size of many segmented page table so can I conclude that amount of frag mention is much more than pure paging and also extra segmentation table is required in this system.
Is my conclusion is true that memory overhead is more in segmented page table?