Editing Demand paging (section)

==Advantages==
Demand paging, as opposed to loading all pages immediately:
* Only loads pages that are demanded by the executing process.
* As there is more space in main memory, more processes can be loaded, reducing the [[context switch]]ing time, which utilizes large amounts of resources.
* Less loading latency occurs at program startup, as less information is accessed from secondary storage and less information is brought into main memory.
* As main memory is expensive compared to secondary memory, this technique helps significantly reduce the [[bill of material]] (BOM) cost in smart phones for example. Symbian OS had this feature.