About 9% of the population is believed to misuse opiates over the course of their lifetime, including illegal drugs like heroin and prescription pain medications such as Oxycontin. These drugs can cause physical dependence. This means that a person relies on the drug to prevent symptoms of withdrawal. Over time, greater amounts of the drug become necessary to produce the same effect (drug tolerance).
Virtual memory is a feature of an operating system (OS) that allows a computer to compensate for shortages of physical memory by temporarily transferring pages of data from random access memory (RAM) to disk storage. Download this free guide.
October 31, 2012. Virtual memory decouples the virtual address space that the programmer and the processor sees from the physical address space of the actual RAM memory. For each process, a mapping is maintained between virtual addresses to physical addressed, and every memory access must pass through this map.