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Physical memory (in a computer) is 'better' than virtual memory because it is much faster (and speed is usually the main concern in this subject area). Physical memory (or RAM) is where the programs and variables are stored whilst they are working. Virtual memory is only used when the computer runs out of physical memory. Virtual memory is just one or more files saved on a hard disk. Access to the hard disk is much slower than access to the physical memory.
What else can I help you with?
Under Windows 2000XP physical memory and virtual memory are managed by what application?
Physical memory, as with all computer resources, is managed by the system. Applications access virtual memory exclusively, no exceptions, ever. Physical memory (RAM), the pagefile, and many other files on the hardisk make up the virtual memory system. This system has been extensively researched and tested and it usually performs very well. Virtual memory is VERY complex, and the designers understand it better than you do.
Is it ever advisable to have a virtual memory size that is smaller than the physical memory size?
No, it is not advisable to have a virtual memory size that is smaller than the physical memory size. This can lead to performance issues and may cause the system to run out of memory, resulting in crashes or slowdowns. It is recommended to have a virtual memory size that is equal to or larger than the physical memory size to ensure optimal system performance.
In paged system Can the logical address space b larger than physical address space?
Yes. This is the fundamental premise of paged or virtual memory - that you can have more logical memory than physical memory.
What are the implications of having a machine with 48-bit virtual addresses and 32-bit physical addresses?
Having a machine with 48-bit virtual addresses and 32-bit physical addresses means that the system can address a larger amount of virtual memory than physical memory. This can lead to potential issues with memory management, such as increased overhead for address translation and the possibility of running out of physical memory space. It may also impact the efficiency and performance of the system, as the mismatch between virtual and physical memory sizes can result in slower data access times.
Why is my virtual memory bigger than my physical memory?
Physical memory is the RAM which you have placed on your motherboard, so if u have 4 slots which support 4 GB max it will equal 16 GB.Virtual memory is the amount of virtual memory allocated by the user & resides on the Hard Disk (Pagefile.sys). There is no limit to the amount of virtual memory which a user can set on a PC. It all depends on the size of the hard disk.
Virtual memory is combination of ram and?
... and a storage device, usually the Hard Disk Drive. This way you can have more "available" memory than physical memory installed on your computer.
What is virtual memory-?
When dealing with computers, there are typically two types of memory. "Real" or "physical" memory is the same thing as RAM. They usually come as cards that you can install into slots on your computer's motherboard. "Virtual" memory, also known as "swap space" or (in Windows) a "paging file" is a dedicated partition or (in Windows) a file on your hard drive that acts like physical memory does. Even though both types of memory do the same thing (that is, storing things temporarily for easy access), physical memory is substantially faster than the typical hard drive. Don't consider virtual memory a replacement for RAM, but more of a complement - to catch the overflow, if you will.
What are the differences between simple paging and virtual memory paging?
In case of simple paging all pages should be in main memory to run a process..while in case of virtual memory paging pages can be loaded as needed by the processor i.e. called demand paging...
Differentiate between the physical virtual and cache memory Explain briefly?
Virtual memory is a type of memory that is allocated by the operating system and is used to speed up operations. Cache memory is RAM that the CPU can access faster than regular ram which is considered physical memory. When the CPU is looking for data, it checks the cache memory first, recently used data will still be in the cache. If it does not find it there, it moves on to use the physical memory. Anytime a program or file is opened, it is first loaded into RAM (physical memory).
What if you increase virtual memory more than 2.5 times your physical RAM although your drive can fit the space required?
I think it is best to let windows automatically determine virtual memory. Less chance of errors that way.
Difference between virtual memory and RAM?
Answer(Techsupport)Resolution: RAM and virtual memory are two different things. Virtual memory allows you to use a portion of your hard drive as though it were RAM. Your hard drive is up to 100 times slower than RAM, so virtual memory is much slower than RAM. When you upgrade your RAM, you can reduce or eliminate the use of virtual memory. Upgrading RAM makes memory available to complete tasks previously handled by virtual memory.
What is paging in an operating system?
Paging in an operating system is part of the operation of virtual memory. Physical pages of memory are being swapped back and forth for virtual pages of memory in a file on the hard disk. This swapping allows all programs to see the same memory structure (e.g. program loads at the same fixed virtual address in memory) and allows the machine to run as if it had more memory than it really does (but at a small speed penalty). Programs and utilities that are idle may stay loaded and ready to run, but paged out of physical memory until actually needed.
