What is the use of swap memory? and why it is recommended to have 3 times of ram size?
Swap Memory Uses and Space Recommendations
Updated May 18, 2018
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Swap space is used when the amount of physical memory (RAM) is full. If the system needs more memory resources and the RAM 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.
SAP recommend for swap 3 times of RAM.