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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19 views

Windows 7: Set Physical Memory Limit

Where can we set the maximum physical memory an Application/Process can use. I am not trying set a cap on Maximum memory, rather the amount allowed on physical memory before switching to virtual ...
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3answers
42 views

Linux server just as RAMdisk

I want to setup an anti-forensic Linux server to protect my users. My aim is to have the Linux distro and everything inside of it running from RAM, never storing anything permanently. It is possible ...
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1answer
39 views

How to detect thrashing on an SSD-equipped system?

With spinning hard disks it was relatively common to hear disk thrashing when some process, Windows or otherwise, was making a bad fist of things. Quite often this was an indicator that a process was ...
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2answers
20 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 ...
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0answers
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 ...
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0answers
12 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. ...
20
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2answers
23k views

Unpause application in Mac OS X

I tried parsing a gigantic XML file and I ended up running out of virtual memory. The OS put all my applications on pause and gave me a screen to shutdown applications to free more space. I killed the ...
7
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2answers
7k views

ImDisk: Create physical memory drive (not virtual memory drive) from command-line

I'm using ImDisk to create a virtual drive in Windows 7. I use it as a temporary drive for documents, and it will be created every time the computer/windows restarts. This is working okay; however, I ...
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2answers
53 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 ...
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0answers
61 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 ...
72
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12answers
38k 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, ...
2
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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 ...
0
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1answer
60 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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0answers
29 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 ...
0
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1answer
52 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
31 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?
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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
46 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
47 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
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2answers
99 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 ...
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3answers
4k views

Virtual memory vs. Virtual address space

I know virtual memory is a paging file that computer uses to store a part of RAM on hard disk for a running process. But how different is Virtual address space? is it the RAM or hard disk or both?
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0answers
113 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 ...
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1answer
277 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.
1
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1answer
71 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 ...
17
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7answers
11k views

What is virtual memory?

I was double checking my notes for 'Virtual Memory' and the definition in my text book is: Process of allocating a section of secondary storage to act as part of the main memory Where as ...
2
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1answer
638 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 ...
13
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2answers
12k views

How to diagnose ballooning OS X kernel_task and wired memory usage?

I have a very strange issue, which I'm having a hard time diagnosing as to the root cause. I have a Mac Pro (2008, 8-core 2.8 GHz, 8800GT) with 14 GB of RAM (recently upgraded because of this ...
2
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0answers
11k views

Create a Virtual USB disk drive and connect it to Virtual Box

I have created a virtual USB removable disk using imdisk http://www.ltr-data.se/opencode.html/ using commands http://diddy.boot-land.net/firadisk/files/imdisk.htm (eg. imdisk -a -s 2104515b -m R: -f ...
11
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3answers
15k views

How to suppress “low memory” warnings in Vista Home Premium when running without paging file?

A few weeks ago I disabled all paging files on my Media Center. I figured that it only ever runs AVG, Media Center, Logmein, Chrome and sundry services to support these and never gets above 1.4-1.5GB ...
0
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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
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2answers
537 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) ...
4
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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. ...
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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 ...
0
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1answer
159 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 ...
0
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1answer
78 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 ...
0
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0answers
127 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
52 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 ...
4
votes
3answers
8k views

Disable virtual memory in Windows 8 is good? [duplicate]

I have an ultrabook hybrid with a SSD (mSata) and HDD working with intel rapid storage and my PC has 6 GB of ram. So I want to know if I can disable virtual memory and what other things should I do to ...
17
votes
3answers
17k views

Commit charge is 100% full but physical memory is just 60% when using no page file

I have disabled the page file in my system (hard disk is too slow, cannot buy a new one right away, cannot move page file to another partition). When I see into Resource Monitor, using memory ...
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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 ...
3
votes
3answers
12k views

What are the benefits of Virtual Memory?

So I've been reading up on virtual memory and it all seems pretty straight-forward and practical. However, I'm choking on one major concept. If virtual memory is stored in main memory, then why even ...
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
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2answers
127 views

Does Windows reclaim RAM right after a process quits?

When we quit a process (e.g. using Task Manager etc), Does Windows reclaim the RAM used immediately? Or does Windows still retain the RAM used for that process?
0
votes
1answer
243 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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2answers
395 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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0answers
91 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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1answer
632 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
166 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 ...