An Operating Systems Vade Mecum

Paging 87small pagesvirtual spaceinternal wasteoverhead spacepage tablelarge pagesvirtual spaceinternal wasteoverhead spacepage tableFigure 3.12 Wasted space and page sizeLarger pages are generally better, unless they become so large that too few processes inthe ready list can have pages in main store at the same time. As main store has becomeless expensive, page sizes have increased, until now they are sometimes as large as 8Kbytes, although sizes from 512 bytes to 4K bytes are more common.6.1 ImplementationThe address-translation table used by the hardware is called a page table. Its structure isdetermined by the architecture of the computer. Entries in the page table do not contain aSize field, since they are all the same length. As with segmentation, address translation