What is swap?

Answer Posted / daya

Swap space in Linux is used when the amount of physical
memory (RAM) is full. If the system needs more memory
resources and the physical memory is full, inactive pages in
memory are moved to the swap space. While swap space can
help machines with a small amount of RAM, it should not be
considered a replacement for more RAM. Swap space is located
on hard drives, which have a slower access time than
physical memory.

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