What is Thrashing?
Thrashing is the term used to describe a state in which excessive paging activity takes place in computer systems, especially in operating systems that use virtual memory, severely impairing system performance. Thrashing occurs when a system’s high memory demand and low physical memory capacity cause it to spend a large amount of time rotating pages between main memory (RAM) and secondary storage, which is typically a hard disc.
It is caused due to insufficient physical memory, overloading and poor memory management. The operating system may use a variety of techniques to lessen thrashing, including lowering the number of running processes, adjusting paging parameters, and improving memory allocation algorithms. Increasing the system’s physical memory (RAM) capacity can also lessen thrashing by lowering the frequency of page swaps between RAM and the disc.
What is Demand Paging in Operating System?
The concept of query navigation in the operating system. This concept says that we should not load any pages into the main memory until we need them, or keep all pages in secondary memory until we need them.