Virtual memory is a technique to provide more address space than the available physical memory. Each process can be given its own virtual memory, and the hardware translates every virtual memory reference to a physical memory address. To accommodate situations when more virtual memory is in use ...

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Is that true that Windows can eventually address executable files as if they were parts of virtual memory?

I've once read somewhere that Windows can treat programs' executables and DLL files as parts of swap file rather than duplicating their content into pagefile.sys when swapping them out of physical ...
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95 views

How to increase swap memory in Windows? [duplicate]

I bought a new system with 4 GB of RAM. I don't know how do I check how much swap memory I have allocated. I know that we can increase RAM physically. I want to increase swap memory on windows. How ...
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518 views

sizes of RAM, of virtual memory and of swap for 32-bit OS

If I understand correctly, a 32-bit OS (Ubuntu) can only address 4GiB memory, so RAM with size larger than 4Gib will only be used 4Gib of itself and the rest is a waste. I am now confused about this ...
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2k views

How to increase Virtual Machine disk space?

I am trying to increase the available disk space of the VM, but no use, tried many things written here and on other websites, mainly saying that this is possible through the Virtual Media Manager , I ...
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6k views

Can Windows 7 pagefile be turned off if 4GB of hi-speed RAM present? [duplicate]

Possible Duplicate: Any reason not to disable the Windows pagefile given enough physical RAM? I believe that there is enough of memory for everything used at the moment to be stored and ...
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2k views

Virtual memory usage vs resident set size

When I launch php-script and do ps aux and have huge number for VSZ, about 450MB. Whilst RSS -- Resident set size -- is about 10MB. From wikipedia, Resident set size is is the portion of a process's ...
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77 views

When is virtual memory not so virtual anymore?

On Windows, Mac & Linux there's virtual memory underway for every application software process in a RAM stack. But in regards to the actual use of my memory accessing data types, where exactly ...
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48 views

Why memory can't be collected cleanly after a process terminats?

After long time running, computers always become slow. Rebooting generally make them faster. But how does this happen? Initally I thought this might be related to memory usage. But recently I learned ...
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92 views

Fastest storage for virtual memory

I want to know which is the fastest storage medium like hd, fd, sd card.... to be used as virtual memory as my RAM is only 1GB and I didn`t want to spend too much on purchasing a new one.
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121 views

TLB access in SMT processors

In SMT (simultaneous multithreading) processors in which threads share the TLB, how does the TLB differentiate one thread's access from the other one? Each thread has its own set of pages loaded into ...
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722 views

System thinks it is swapping, but isn't

I have a linux server (Ubuntu 10.04) which has no swap space (swapon -l reports nothing, 0kb swap memory listed in /proc/meminfo). The beginning of the output of top (sorted by %mem) is reproduced ...
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2k views

Can I disable virtual memory? [duplicate]

Possible Duplicate: Do I still need to use virtual memory? Suppose I have a system with 8 gigs of RAM. I have used systems with less than that including physical RAM and virtual memory. ...
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235 views

I want to increase the swappiness in my windows 7

as I have 60% RAM usage every time. I have already increased Virtual Memory (Increased Swap Size) but want to increase swappiness too. see my RAM usage:
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261 views

Windows - How can I flush modified memory?

This is a follow up on my previous question, here: Windows modified memory without a pagefile - Super User I have no pagefile and a lot of modified memory according to resource monitor (Win 7 x64). ...
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113 views

Windows modified memory without a pagefile

How does Windows' modified memory work without a pagefile? The physical memory is modified and then...? I'm running Windows 7 with 16GB of RAM and no pagefile. I have about 2.5GB of modified memory, ...
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2answers
171 views

What is the point of loading a program into RAM if virtual memory is just going to put it back on the disk?

After reading this question about virtual memory, I was inspired to ask: it seems like walking in a circle when a program is run it is loaded into memory from disk but then there's not enough space in ...
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657 views

Virtual memory (caching) on Windows 8

I have read a bit about the issue, and I understood that the OS constantly pushes memory to the disk, so later, when another application needs a lot of RAM, it allocates that memory to it and "moves" ...
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230 views

Turn off single process swap and overcommit

Two questions: Is there some way to turn off swapping for a given process, i.e., is it possible to kill a certain process if it uses all the system's primary memory available? How do I deactivate ...
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86 views

Linux virtual memory consumption after parsing log file

I wrote a parser to read the auth.log. For some reason while parsing auth.log I get that VSZ is larger than the total physical memory, which is 2GB. Depending on the size of auth.log and how long ...
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649 views

Empty/dump modified memory to pagefile in windows

I use process hacker to clear out a few gigs of ram before loading large files such as 2GB stack traces so that everything does not freeze up for an hour as stuff gets swapped back and forth. However ...
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414 views

Page pool and cache memory

It is subtly mentioned on this article, that the page- and non-page pool, are used for contiguous memory allocations which are sub-page size. It then goes on to list the differences. I am not sure ...
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1answer
808 views

Is there an alternative memory allocator that uses separate swapfile?

Is there alternative allocator that can be LD_PRELOADed into a process, overrides "malloc", "calloc", etc. and allocates things using it's own swap files (mmaped to files instead of MAP_ANONYMOUS)? I ...
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1answer
599 views

Virtual Memory and SSDs [duplicate]

Possible Duplicate: Virtual Memory and SSD On a Windows 7 system, isn't it more beneficial to leave the page file ON the SSD versus moving it over to a HDD? I've heard some say if you move ...
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1answer
26 views

Why Does my VM Keep Vanishing?

I have a Windows XP SP3 Professional OS running on a Dell Optiplex GX270. When I'm working with Visual Studio Express (a programming IDE), Google SketchUp, or any other resource-heavy program, my ...
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21 views

Win8.1 Bad Virtual Memory Managment?

For the last couple weeks I'm facing a serious problem with my Win 8.1 32bit (64x CPU) 4G RAM, having "System Managed size" setting for virtual memory (then win allocates 1.8G), minimizing even light ...
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12 views

Calculating average working set size

Say I want to calculate the average working set size (WSS) of this reference page string considering that the window size, delta = 3 : 1 2 310 (1 3)5 2 3 (2 4 1)10 5 5 1 1 1 2 2 5 (5 2)5 1 2 I ...
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91 views

Recommended paging file size formula

Is there a formula by which Windows calculates recommended paging file size? (see picture). This is definitely not 1,5 x RAM (this PC has 8 GB or RAM). I need to implement this calculation in my ...
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239 views

What is the exact difference between the parameters (pgpgin, pswpin) and (pswpout, pgpgout) in /proc/vmstat?

Please note that this question is specific to linux only. And by swap space, I mean the dedicated swap partition. I did google a bit on this, and found these definitions: Paging refers to writing ...
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33 views

Cannot start site on IIS-Express

Some background: I Am developing a website that uses a BI layer that relays on Matlab. In order to make the logic layer available across my site I am creating it when the site starts (in ...
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1answer
27 views

what is a word-length boundary?

I'm reading this article: http://en.wikipedia.org/wiki/Struct_%28C_programming_language%29 And it states the following: "The C struct directly corresponds to the Assembly Language data type of the ...
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0answers
86 views

Windows 8 will not boot after set virtual memory to 9999MB

To increase the performance of an ASUS X551M I increased the virtual memory 9999MB. In the past I would determine the max available virtual memory by typing in 9999. I expected to see something like ...
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0answers
28 views

Prevent a closed source chosen process from swapping on Windows [duplicate]

When I run VirtualBox If I don't use VirtualBox for some time and then I come back to using it the virtual machine runs very slowly, obliviously all subsequent operation go enough fast. How I can ...
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15 views

Hardware support of windows 7

To accomplish the mapping of process memory, perhaps virtual, hardware support is often used. This is normally done via process base registers. The windows 7 operating system may also need base ...
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19 views

Why was overlaying suppose to be done by the programmer?

I was reading about OS memory organization, and the first entry in the Virtual Memory(VM) chapter refers to overlaying and how when it was used at a large scale (up to the 60s) the process memory ...
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36 views

virtual memory view in windows server 2008

AFAIK, Task Manager in windows 2008 shows the physical memory. I have a program that sums up the FREE physical & FREE virtual memory in MG. How can I confirm it has the right output of this sum? ...
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1answer
72 views

Is CPU cache (L1 - Ln) equal to TLB

If we are talking about CPU cache. Is Ln synonym for saying 'TLB (translation lookaside buffer) of type Ln' or does Ln include also somethin else than just TLB?
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1answer
1k views

Top command cache vs free memory

When I am running top command (on embedded system with 64 MB RAM) I am getting below description on total memory usage: "Mem: 43468K used, 968K free, 0K shrd, 1280K buff, 21896K cached" It looks ...
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1answer
100 views

Virtual memory paging

If the page size is 512 bytes and the paging table has 64 elements, each 11 bit. Howmany bits is the physical address then? - What does '11 bit' mean in this case? Is it the number of the frame (2^11) ...
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1answer
200 views

Mouse disconnecting and programs not closing and more

My mouse keeps disconnecting and reconnecting as well as my usb modem. My programs don't always close when i tell them to and even when I use task manager. T hey are also using all my RAM for a lot ...
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1answer
69 views

Allocation of memory to guest os [closed]

I have 6gb memory on my host OS (Windows 7 64bit), I am planning to install Oracle Linux as guest using Virtual Box. How much memory should I allocate to guest OS? In guest OS I am planning to ...
-1
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1answer
162 views

How can I use a flash drive to increase my virtual memory?

My computer has 8gb of physical memory. I'm running some memory intensive processes that quickly eat up that 8gb. When the physical memory runs out, it starts using the virtual memory and I see ...
-1
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1answer
397 views

Will a swap file not slow down the system so much if a Solid State Drive is used?

When RAM runs out on a computer, the swap file is used, and then the system can become quite slow. But if the notebook or desktop is using SSD nowadays, will it be less of a concern? (Updated Oct ...
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2answers
457 views

Why does the Windows Task Manager never show more than 80% memory used?

In the Windows Task Manager I have never seen the memory usage close to 100%. If physical memory is never depleted, how come computers have virtual memory? I realize many years ago maybe computers did ...
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3answers
21 views

What size for Virtual Memory [duplicate]

I am a total novice when it comes to hardware settings. I am using Windows Server 2012 64 Bit. It has 12GB RAM. I have a C and virtual D drive. The build is i5-2400 3.10 GHz. There is no current ...