Disadvantages of paging and segmentation
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Advantages :
No internal fragmentation
May save memory if segments are very small and should not be combined into one page.
Segment tables: only one entry per actual segment as opposed to one per page in VM
Average segment size >> average page size
Less overhead.
Disadvantages :
External fragmentation.
Costly memory management algorithms.
Segmentation: find free memory area big enough.
Paging: keep list of free pages, any page is ok.
Segments of unequal size not suited as well for swapping.
No internal fragmentation
May save memory if segments are very small and should not be combined into one page.
Segment tables: only one entry per actual segment as opposed to one per page in VM
Average segment size >> average page size
Less overhead.
Disadvantages :
External fragmentation.
Costly memory management algorithms.
Segmentation: find free memory area big enough.
Paging: keep list of free pages, any page is ok.
Segments of unequal size not suited as well for swapping.
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