Does UNIX have this concept

[sammy]

I came across the term called as paging in an operating system book. Does UNIX also follow this paging concept? If so how is it done?

[Angela]

I think paging is a technique followed with multiprocessing and multi-handling operating system. Since UNIX is both I think paging would be supported by UNIX. If I am wrong someone correct me on this.

[zsk_00]

Yes, UNIX does support paging. When you start a process, UNIX kernel reads only a part of the program/file from the disk into RAM in the form of small blocks. Each block is called a page. Once the CPU has processed these pages, more pages are requested by the kernel and if not in RAM, these are read from disk.

[caradoc]

I have some doubts related to these paging concepts. Is there any variables used in UNIX for controlling the paging operation and also I wanted to know the difference between paging and swapping?