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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42 views

Windows lags whenever I download something

I'm using Windows 10, and whenever I download something my mouse lags a lot that it makes the computer unusable. And it's not just the mouse, for example it I open a youtube video it plays like in 0.5 ...
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5 views

Virtual memory size same Python application on Centos 7 and RH 5.2

Is there a reason why the same python app and code consumes about 90MB of virtual memory size in Red Hat 5.2 32bits python 2.4 and abut 300MB in Centos 7 64 bits with python 2.7? Both app's versions ...
1
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2answers
17 views

What is the primary reason more RAM makes a computer faster?

Whilst studying for an exam I read that more RAM decreases the number of page faults. Given that handling a page fault can cost many millions of CPU cycles is this the primary reason more RAM will ...
0
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0answers
11 views

Virtual Memory Management in El Capitan (10.11.1)

Recently, I've learned a little about both Windows and Linux approaches to virtual memory management, finding the ability to tune Linux's VMM system for particular purposes particularly interesting. ...
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0answers
53 views

Allow windows to use more than 64GB of virtual memory

I am running a process that will take a lot of memory (far more than I have physically), and I want it to finish. Currently, when the committed memory amount reaches 64GB for the system, windows ...
0
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1answer
55 views

Kernel threads and process virtual address

If the kernel is spawned as threads and resides in the memory then how could the ps command identify them if those are not normal process and i give you more look here: root 2 0 0 ...
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2answers
51 views

Is data from a usb device stored in ram while getting same ( etc explorer listing items )?

Does it go first in ram then to software? Or does some programs like Windows explorer have "VIP" permission cause they are child of OS, for direct access? EDIT Does it possible to make kernel, to ...
0
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0answers
27 views

Getting “Watch Dog Time out” when starting VMWare Workstation

I had installed VMWare Workstation at my windows 8.1 but whenever I am starting the VMWare Workstation I am getting error "Watch Dog Timeout" could please suggest us what to do now. I have 4 GB of ...
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1answer
36 views

Virtual memory running out when there are free physical memory?

My firefox suddenly become sluggish and then froze. I opened Process Explorer to see what's going on and noticed the main thread of firefox.exe was stuck in the kernal function ...
0
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1answer
30 views

big pagefile for a windows system with low RAM

My Windows Server 2012 - 64 bit has nothing more than 4 GB of RAM. Unfortunately I am in need to open and keep in memory files of around 40 GB. To make sure this happens can I just increase the size ...
0
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0answers
16 views

Does virtualization reduce disk trashing?

If a program does a lot of disk trashing (like Chrome), can this be reduced by running it inside a virtual machine? How does a VM host handle disk writes that requested by the virtualized OS?
0
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0answers
31 views

how does a process know it's pages have been swapped out?

Let's assume I have several processes running, a1 and a2. a2 takes so much space that physical pages belonging to a1 start to get swapped out. a1's page table has to be modified to reflect this. how a ...
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1answer
41 views

Is it possible to manually send programs to virtual memory in windows?

If you have many open programs and your machine is going too high on memory/cpu utilization you might want to close a program without loosing its state (sending it to virtual memory) and then resume ...
1
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1answer
45 views

What does the content of the page table look like after a page has been swapped out to the disk?

From what I understand, the page table maps virtual addresses to physical addresses. But what if a page has been swapped out to the disk? Wouldn't the location of the data take more bits to write ...
0
votes
2answers
91 views

The instruction at X referenced memory at Y. The memory could not be written

TFG (Total Files Gaurd) is a software that used in offices to protect client's data from thief by malware and users. It encrypt some types of files(Network's Admin selects which type he/she want to be ...
1
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0answers
107 views

Linux on iMX6 and CMA memory

We have a embedded linux system(yocto 1.8) running on a i.MX6 board with 1GByte of RAM. The kernel is configured to have 320MByte of CMA reserved and no swap. Kernel 3.10.53 When we run a small test ...
0
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1answer
264 views

Change virtual memory size in Windows 10

How do you change the page file size on Windows 10? Note: The last Windows operation system I've used is Windows 7.
2
votes
1answer
39 views

Processors and virtual/physical addresses

In nutshell, as I understand memory management, processor produces virtual addresses. These addresses are translated to corresponding physical addresses using per-process address table by MMU (with ...
1
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1answer
68 views

What is Windows virtual memory allocation policy?

I set the size of the virtual memory to be managed by system. While there is ample space on the disk, I ran into the 'out of memory' error, contrary to my assumption that the system should just ...
2
votes
1answer
599 views

How to diagnose low memory on Windows 10?

2 weeks ago I upgraded Windows 8.1 to Windows 10 on my system; Core i5, 4GB RAM. It was working fine, Now I am getting “Windows on low memory." messages. System process is taking too much memory. If ...
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2answers
43 views

Disable win7 harddisk ram for a specific software

Sometimes when you ask matlab to create a very large array, it exceed actual ram and tries to go into harddisk, which slows down the computer so much that it becomes impossible to close matlab, only ...
4
votes
1answer
4k views

Operating VirtualBox 5 on old Pentium 4 32bit CPU with 4GB RAM

Trying to operate VirtualBox 5 on old Pentium 4 32bit CPU with 4GB RAM. But spinning up 32bit Linux/Ubuntu VMs is so slow. Have adjusted allocation of RAM and hard drive settings and still too slow. ...
0
votes
0answers
28 views

What's the internal operations for a PC to copy data from an external flash drive to an internal HD?

I was asked about the operations on how data is copied from an external storage to an internal storage in a computer. The info I could find is about how a CPU fetches data from RAM. I don't have ...
4
votes
2answers
509 views

Why does my CPU only support 32GB RAM when it has 39 address bits?

The following is the output of cat /proc/cpuinfo user@localhost:~$ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 60 model name : Intel(R) Core(TM) ...
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1answer
74 views

How does Windows deal with process memory or resource exhaustion?

The other day I was working on a Windows 7 32-bit PC, with a few applications running including Firefox. Over time I kept opening new tabs in Firefox until, suddenly, the Firefox window started ...
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0answers
121 views

How to set heap size (-Xmx) more than 1 gb in Windows 64 bit machine with 4gb ram?

I got the error as below: Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. I can set maximum heap size 1gb. After ...
0
votes
2answers
49 views

High VIRT memory used by file manager

I'm using elementary OS and it's default file manager Files. I've noticed that after a while of usage, htop shows that pantheon-files (how the app is named) consumes over 10Gb of VIRT memory. This ...
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1answer
2k views

How do I know how much swap is used on Windows 7?

Apparently, as per Commit charge is 100% full but physical memory is just 60% when using no page file and http://brandonlive.com/2010/02/21/measuring-memory-usage-in-windows-7/, the Commit numbers in ...
0
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1answer
239 views

Size of page table and number of entries

Suppose on 32 bit OS, we have 4 GB of available virtual address space. So, that means we need to map 2^32 = 4,294,967,296 addresses. If you calculate the size to store all the 4,294,967,296 addresses ...
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0answers
86 views

Is there a way to set a paging file on a folder-mounted volume in Windows 7?

I have a physical volume mounted to an NTFS folder in Windows 7 that I would like the system to use for paging. Is this possible and, if so, how do I enable it? Thanks in advance.
11
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3answers
1k views

Does it matter about the amount of the swap area in Linux system

Does it matter if the amount of a swap area in Linux was set too small (say 1Gb), and the main RAM is 128Gb? Should we always set the amount of swap area to be twice the amount of RAM? UPDATED: Hi, ...
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votes
2answers
377 views

Why does Windows 7 intentionally make itself slow?

I've encountered this oddity with 5 different machines, running different versions of Windows 7. I've seen the same issue in Home Premium, Professional and Ultimate. The System Allocates Less Virtual ...
0
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1answer
131 views

Application to Automatically Free Modified Memory

Is there a Windows application or script that can free modified memory belonging to a given application. I have tried Flush File Cache which is great as a big ol' hammer to clean out all modified ...
1
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1answer
598 views

What does it mean to have a swap partition mounted at /dev/null?

I ran swapon -s on a VPS that I’m using and discovered that there’s a swap partition pointing at /dev/null. # swapon -s Filename Type Size Used Priority /dev/null partition ...
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0answers
164 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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votes
3answers
63 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 ...
1
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1answer
208 views

Windows 8 Automatic Page File Size vs Windows 7

I've noticed that Windows 8 sets smaller page files by default. Windows 7 systems seem to create a page file the size of the RAM (eg 4GB of RAM means that Windows makes a 4GB page file). In Windows 8 ...
1
vote
1answer
448 views

All memory go's to “Standby” and no memory left on “Free” issue (Win 8.1)

Problem on my win 8.1 the memory does not go's to free memory when another apps or game are on..it is causing my pc work extrimly slow even when it says 13GB available..what should i do? (All forms i ...
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votes
1answer
1k 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 ...
70
votes
12answers
37k views

Should I disable swap file if I have lots of RAM or should I move it to a virtual RAM drive?

Imagine I have tons of RAM. Let's say 64GB. That's a lot for even gaming PCs. Now the default location of a pagefile in Windows is on the main OS drive, be it HDD or SSD, which are faster in general, ...
1
vote
1answer
42 views

Open programs take forever to reload after another program used-up all the memory

I have the following phenomena: I have 4GB RAM, and sometimes I use a program (program A) which uses up all the available memory, say 3.9GB. If there are more open programs, then their memory is ...
0
votes
0answers
547 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 ...
2
votes
1answer
77 views

How big are copy on write pages in linux?

We used RHEL 5.8 at my office. Our program relies on fork for parallelism. The application is very memory hungry (up to hundreds of GB) so we're relying on copy-on-write functionality to make this ...
1
vote
3answers
160 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 ...
2
votes
2answers
280 views

Should I/Need I set the virtual memory on system parition or not?

I have a single drive(500Gb) divided into 2 partitions C:(98 Gb, system partition) and D:(368 Gb). Where should I set my virtual memory(manual input) ? Do need I to set it on system partition to ...
0
votes
1answer
61 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 ...
6
votes
1answer
2k 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 ...
1
vote
0answers
96 views

How can I see the correct “private bytes” value in process explorer?

I have a process that intentionally uses large amounts of memory. When I view this process in Process Explorer's list view with all memory-related columns enabled, this is what I see: Note that all ...
2
votes
1answer
3k views

Why does Windows always use as much Virtual Memory as there is RAM installed?

And why does it want to have a maximum of twice as much of that amount? My System has 32GB of RAM and Windows, by default, sets a minimum of 16MB Virtual Memory, allocated 32GB(!) and recommends ...
0
votes
0answers
66 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 ...