Hi Learner! Here, we are going to explain in detail about what is virtual memory in OS and its examples, types, and uses; and involving with how virtual memory works without any hassle. So, at the end of this article, you will definitely fully understood about virtual memory in operating system with ease.
What is Virtual Memory?
Definition/Meaning – Virtual memory is large secondary memory of operating system, and it allows to hardware and software of computer system to support for physical memory on transferring time of data from main memory to secondary memory such as hard disk.
Virtual Memory Diagram
Due to move virtual memory into physical memory, operating system splits own memory into different blocks with fixed number of addresses. All pages reserved in the hard disk, and OS moves it from hard disk to primary memory, when they get need, and finally virtual addresses translate into real addresses.
Virtual Memory Tutorial Headlines:
In this section, we will show you all headlines about this entire article; you can check them as your choice; below shown all:
What is Virtual Memory?
Need of Virtual Memory
Types of Virtual Memory
How Virtual Memory Works
Virtual Memory Example
Difference in Between Virtual and Physical Memory
Advantages of Virtual Memory
Disadvantages of Virtual Memory
FAQs (Frequently Asked Questions)
What is virtual memory in operating system?
Why it is called virtual memory?
What is the size of virtual memory in computer architecture?
How do I increase virtual memory?
Where is virtual memory usually located?
How virtual memory is implemented in OS (Operating System)?
How is virtual memory created?
Why is virtual memory used in operating system?
Why is virtual memory needed?
What is virtual memory in computer architecture with example?
What is virtual memory example?
What are the different types of virtual memory in computer architecture?
Let’s Get Started!!
Need of Virtual Memory
Main objective of needing is virtual memory is to increase the storage space of running memory, without adding any external memory such as RAM (Random Access Memory).
If, any time computer’s physical memory totally get occupy for other programs, but same time it needs to some extra memory then requests forwards to hard disk for swapping files like as virtual memory.
If, any time computer requires the extra more main memory (RAM), then it try to install in the machine, and it works as small area of disk for fulfill system needs.
Entire memory operations of computer managed by the memory management unit (MMU), and it enables with handling Virtual Memory. Memory management unit embedded in the CPU (Center Processing Unit).
In virtual Memory, two techniques use like as Paging and Segmentation.
Paging
In this way, memory get spit into different small blocks with near about 4 KB in size.
The paging enables with using the page table, which is help out to translate the virtual addresses for using operating system and other running other applications, and they use those addresses into physical addresses which are using by MMU.
When, operating system and other currently using applications are not able to find appropriate address, which located into RAM, then memory management unit try to response for missing memory reference along page fault. But if Page occur into RAM, then its virtual address exists into page table.
Segmentation
Main objective of using the Segmentation is to handle the virtual memory. In this process, virtual memory divides into various different segments. But these segments are not using into memory because those segments to be transferring in the virtual memory on hard drive. Segment table keeps all records of entire information of whole segments.
Sometime virtual memory system tries to merge the paging and segmentation, and after getting combinations of then memory get divide into pages or frames.
Now these days, virtual memory is very common word. Virtual memory is very helpful, when anyone page get need to load into primary memory for its execution, but it has not enough memory for those pages.
Then, virtual memory helps to short out that issue such as – lack of memory.
Now, here we will explain the working of virtual memory with suitable example. Like as –
Virtual Memory Example
Suppose, if operating system requires the 200 MB memory’s space to manage the all programs, which are working in currently.
It has no any boundation for all degree of multi programming.
It allows huge virtual address space to physical memory.
It allows allotting the specific segment of program for execution of particular program, so it helps to enhance the speed of execution time.
It allows the protection between two programs.
Disadvantages of Virtual Memory
There are some limitations of virtual memory such as –
While using of virtual memory, all application’s speed are getting slow.
It consumes more hard disk space.
Lack of system stability
It is not capable to deliver the equal performance like as RAM.
Due to virtual memory, system gets degrade.
It consumes more time between switching the applications.
Increase the software complexity and hardware cost.
Required the best hardware support
Kernel developers require a profound understanding of the hardware, if they are using Virtual memory.
FAQs (Frequently Asked Questions)
What is Virtual Memory in Operating System?
Virtual memory is going to enable data that is in the RAM but not presently used to transfer to the hard disk, it allows getting free up the room for another program and data as well. You can get complete detail about virtual memory through this blog post.
Why It is Called Virtual Memory?
A computer is able to address more memory compare to the amount physically installed on your system, and so this additional memory is actually known as the virtual memory.
What is the Size of Virtual Memory in Computer Architecture?
RAM has a limited resource, but whereas virtual memory has a unlimited resources, so there can be various processing, and every process has its own 2GB private virtual address space.
How do I Increase Virtual Memory?
Go to Control Panel > System and Security > System
Choose the ‘Advance System Settings’ to launch your ‘System Properties’. Then it will open the ‘Advanced’ tab.
Select the ‘Settings’ underneath ‘Performance’ to open ‘Advanced’ tab; then underneath ‘Virtual Memory’ choose the ‘Change’, and here ‘Virtual Memory’ option will show.
Where is Virtual Memory Usually Located?
Usually, virtual memory is located on the ‘Hard Drive’.
How Virtual Memory is Implemented in OS (Operating System)?
Through this article, we already have explained about how to implement virtual memory in OS; you can read it.
Why is Virtual Memory Used in Operating System?
Virtual memory uses whenever the computer has not more present RAM (Random Access Memory). Whenever, the amount of RAM required keeping hold all running programs and data is higher to amount of RAM present into computer.
Why is Virtual Memory Needed?
Main objective of needing is virtual memory is to increase the storage space of running memory, without adding any external memory such as RAM (Random Access Memory).
What is virtual Memory in Computer Architecture with Example?
Virtual memory is common concept that is using into computer’s operating system. Virtual memory is going to use both hardware and software to get enable a computer to provide extra memory for physical memory shortage and temporarily transferring data from RAM to disk storage.
What is Virtual Memory Example?
Example: A user may try to get load their email in their browser window; while also running a word processing software, a shift scheduling software and a content management system at same time frame.
What are the Different Types of Virtual Memory in Computer Architecture?
There are two types of virtual memory like as Paging and Segmentation; both explained in detail above in this post, you can check it.
Summing Up
Through this article, you have been fully learnt about what is virtual memory in OS and its examples, types, and uses; and involving with how virtual memory works without any hassle. If this article is helpful for you, then please share it along with your friends, family members or relatives over social media platforms like as Facebook, Instagram, Linked In, Twitter, and more.