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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Why does increasing Virtual Memory not helping game performance? [closed]

My RAM has a pathetic 2GB and most of my applications and background services take up at least 25% to 35% of it and thus causing the game to be laggy and all. I've tried adding virtual memory, from ...
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1answer
3k views

Identify an instance of Google Chrome by PID

While working I generally need around 40 windows open at a time and run 100-200 processes. When memory constraints become an issue, I start picking off the processes that are the most resource ...
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1answer
551 views

How much virtual memory? [duplicate]

Possible Duplicate: why do we need to set swap space as twice big as our physical memory? I have been working on computers for quite some time now and realize the importance of virtual ...
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1answer
635 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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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 ...
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1answer
375 views

How to know the size of page frame used by my OS?

How to know the size of page frame used by my OS ? This could be useful for some optimizations when I code. (Allocate big buffer that fit in a page frame for example). Page frame is determined by ...
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1answer
3k views

Windows 7 virtual memory size

I have computer with 4GB RAM running windows 7 64 bit edition. I have set paging file size 8000MB( both initial size and maximum size) according this document, but after restart I'm seeing only 4GB ...
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1answer
1k views

Scheduled Task Priority and Paging problems

I just scheduled a task in my Windows 7, and I have 2 problems with it: The process starting with Below Normal priority. Even after manually changing the priority to Normal (via Task Manager), the ...
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1answer
100 views

When a process isn't using virtual memory, does it have the kernel or user memory in RAM?

A process can use upto 4 GB of virtual memory (including user and kernel) but when it's not using virtual memory does it have the kernel and user memory in ram?
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686 views

Make JVM use Virtual Memory only after using 1GB of RAM

Id like to run a memory intensive java program and limit how much physical memory it can use. Is possible to configure the JVM to use no more than 1gb of RAM, and use only virtual memory after it ...
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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 ...
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2answers
3k views

OS X virtual memory size can't be correct, can it?

I've got Snow Leopard and 8G of RAM. Activity Monitor reports a VM size of 173 *Giga*bytes. My hard disk is only 250G and 200G of that is in use. I've got a lot more data than 27 GB on my hard ...
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865 views

ulimit broke my server

I ran "ulimit -v 75" to get SBCL working, and now nothing will run on my server. $ sbcl Killed $ vi Killed $ man ulimit Killed $ ulimit -v 256 -bash: ulimit: virtual memory: cannot modify limit: ...
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297 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 ...
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1answer
433 views

Can we decrease page swapping? [duplicate]

Possible Duplicates: Windows Swap (Page File): Enable or Disable? Can we decrease page swapping? My system has a 5GB RAM. And my paging file size is 2GB Even though I have many RAM, ...
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2answers
537 views

Optimizing Windows XP to use less HD access

I have a corporate laptop with a great processor and 4 gigs of RAM, however the HD is ancient, we're talking 4200RPM here, roundabouts. Programs run great, but load horribly, horribly slow. Any ...
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1answer
83 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 ...
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0answers
10k 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 ...
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1answer
1k views

How can I configure Firefox to assume I have less memory?

Firefox has a few different settings that automatically get tuned based on the system ram. This is all great if you're running nothing besides Firefox, but when you're running half a dozen apps at the ...
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1answer
211 views

High latency when writing big files. How to prevent more-than-second page faults when quickly filling up FS?

When I do cat /dev/zero > /some/file all processes tends to become slow (even non-IO related). latencytop shows "Page Faults" are more than 2 seconds. Swap is not used. Adjusting vm.dirty* does ...
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1k views

Decode win7-64 physical memory values for me

win7-64: If you can, please explain these readings or supply a documentation link, thanks. Task Manager: The vertical Memory gauge is at 1.93GB. Physical Memory (MB) total 8191 cached 5417 ...
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what differences and relations are between logical and virtual memory?

I was wondering what differences and relations are between logical and virtual memory? How do their purposes differ? Are the relations and differences the same for logical and virtual addresses?
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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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2answers
241 views

Does a storage HDD need a page file?

I've an HDD used only for storing files (i.e., not used for installing software). Do I need to set a page file for it?
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2answers
1k views

What's the virtual memory address space limitation of a Win32 application?

Below is what I understand, please correct me if i'm wrong about the 3GB part? a win32 application's virtual memory address space is limited by 4GB. Of the 4GB memory address space each process ...
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3answers
162 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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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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2answers
730 views

On Linux there is a 3GB/1GB kernel option. How do I do this in Windows 7 32-bit?

I have 4GB RAM installed. PAE is off. How do I tell the Windows 7 32-bit kernel to allocate 3GB virtual paging area to user mode and only 1GB to kernel space?
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3answers
887 views

Will increasing swap partition size increase the memory that can be used by a program?

I have a program that requires a lot of memory. So much that the malloc fails as the system goes out of memory. I don't care if the overhead for swapping pages in and out of the disk is too high - I ...
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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?
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750 views

Killing Windows 7 process which is using memory - look at Commit or Private?

I'm trying to clear up memory usage on my windows 7 with 2 GB RAM Oracle.exe never shows up in the top processes, but the Resource Monitor shows it uses 637 Mb of commit (virtual memory) v 12Mb of ...
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566 views

What is commit charge?

Wikipedia says In computing, commit charge is a term used in Microsoft Windows operating systems to describe the total amount of virtual address space for which the backing store is the ...
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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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2k views

Changing virtual memory using batch

I am making a program using batch to boost pc performance and I have now come to the stage where I need to edit windows virtual memory to a size that I can change in the code. if needed it can be done ...
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4answers
6k views

Will allocating too much virtual memory have any negative effect on your laptop?

Like will it slow down your boot-up? Also what problems will arise if you allocate more hard drive memory for virtual memory than what is available, will that cause any issues?
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1answer
307 views

Enormous virtual and private memory usage on a Windows 7 x64 Installation

recently my Windows 7 x64 machine started to act very weirdly, a lot of programs would crash randomly. The one application that would consistently crash was Team Fortress 2, after loading a map, I ...
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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 ...
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1answer
460 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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2answers
667 views

Do I need Readyboost and page file if I have lots of free RAM?

I have 12 GB RAM installed in my laptop. I have currently both page file and ready boost disabled. Most of the time my RAM usage are under 6 GB. So, I still have 6 GB RAM all the time. Considering ...
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1answer
2k views

Reducing both pagfile.sys and hiberfil.sys in Windows 7

I recently used Defraggler to consolidate my free space areas on my D: drive preparatory to using Disk Manager to break my drive into two areas, one as my "data area" for Windows 7 (normally on my C: ...
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1answer
2k views

Virtual memory and commit charge

I've read a lot about commit charge and something still is bugging me. On my mac (and probably on linux too), what is the relation between VM size and and Commit memory (windows). I think I fully ...
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1answer
1k views

Linux Virtual Memory/Swap isn't being used

I think my virtual memory is not configured correctly on my MintLinux machine. I opened up a new IDE, IntelliJ IDEA, and my whole system appeared to freeze. I tried to TTL to the console but that did ...
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3answers
2k views

Windows application to monitor virtual memory activity

Is there a windows application that shows a graphical representation of virtual memoey, along with which pages are resident, which are being moved in or out, and so on. What I"m looking for is some ...
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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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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 ...
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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 ...
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1answer
213 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 ...
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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 ...
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1answer
482 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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1answer
1k views

What memory statistics does Linux' ps command really display?

Consider the following pmap output of a simple tail process on Linux: $ pmap -x 3974 3974: tail -F /var/log/syslog Address Kbytes RSS Dirty Mode Mapping 0000000000400000 60 ...