What is virtual memory? How does it improve system performance?
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Virtual memory is a feature of a computer system that allows a computer to compensate for the lack of physical memory by temporarily transferring data from random access memory (RAM) to disk storage
How virtual memory works:
1. Data Transfer: When the RAM is full, the system transfers some data to a location called “swap space” or “page file” on the hard drive or SSD.
2. Access: When the transferred data is needed again, the system switches back into RAM, possibly moving additional data into the swap space to make room.
How to improve system performance:
– Large Memory Space: Virtual memory allows programs to use more memory than actual physical RAM, allowing you to run multiple programs at the same time.
– Multitasking: Helps multiple applications run smoothly by managing available memory.
– Program size: Programs that require more memory than physically available can still use virtual memory.
Specifically, virtual memory helps run multiple applications at once and handle large functions without the need for additional physical RAM.
Virtual memory is a memory management technique that allows a computer to use more memory than is physically available in the system’s RAM. It does this by temporarily transferring pages of memory to a reserved space on the hard disk, known as the page file or swap space. This process is called paging.
When the system needs to access a page of memory that is not in RAM, it retrieves the page from the page file and loads it into RAM. This process is called a page fault. Virtual memory improves system performance in several ways:
Overall, virtual memory enables systems to run more efficiently and reliably, even when faced with memory-intensive workloads.