Answer:
Memory paging
Step-by-step explanation:
Memory paging can be described as a memory management technique for controlling how a computer system memory or the technique used by the operating system of a computer to manage how a computer system memory resources are shared.
Bottleneck can simply be explained as a kind of hardware limitation in a computer system.
In this case, when there is not enough RAM available, paging with Windows uses virtual memory, where a paging file is created on the hard disk of fixed size data blocks from RAM. It will results to excessive paging in the overuse of the disk subsystem.