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Swapping in operating system-computer world

  Swapping in operating system

Swapping 

Swapping is a memory management scheme in which a any process is temporary swapped from main memory to secondary memory. Main memory can be made available for other process it is use to improve main memory utilization. A place in the secondary memory where the swapped out process is stored this space is known as swap space. 

 Swapping policy is used for priority based scheduling algorithm if a higher priority process arrive and want service, the memory manager can Swap out the lower priority process and then load and execute the higher priority process. When a higher priority process finishes the lower priority process can be swiped in a continuous this type of swapping is sometime called roll out roll in.

Advantages of swapping 

  1. It help the CPU to manage multiple process within a single memory.
  2. It improves the main memory utilization.

Disadvantages of swapping 

  1. If the swapping algorithm is not good, the composite can increase the number of page lost and decrease the overall processing performance.
  2. Longer memory access times.

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