Why paging is used?

Paging is solution to external fragmentation problem which is to permit the logical address space of a process to be noncontiguous, thus allowing a process to be allocating physical memory wherever the latter is available.
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Sandhya.Kishan

  • Apr 23rd, 2012
 

Paging is a process of dividing the memory into equal sized logical blocks.When any page is required the operating system searches for that page in the secondary memory and copies that page to the main memory, if not found then a trap known as page fault is generated.

PCs performance is increased by using paging.It deals with external fragmentation problem which allow the logical address space of a process to be noncontiguous, which makes the process to allocate physical memory. .

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