Page Tables Page tables can be very large Consider a system that supports 231=2 Gbytes virtual memory with 29=512-byte pages. The number of entries in a page table can be as many as 222 Most virtual memory schemes store page tables in virtual memory Page tables are subject to paging14 Page Tables • Page tables can be very large – Consider a system that supports 231=2Gbytes virtual memory with 29=512-byte pages. The number of entries in a page table can be as many as 222 • Most virtual memory schemes store page tables in virtual memory • Page tables are subject to paging