Questions tagged [virtual-memory]
Virtual memory is a method where each process is given its own address space (virtual memory), and the hardware translates every VM reference to a physical memory address. Originally VM was used to provide more address space than the available physical memory. To accommodate situations when more virtual memory is in use than physical memory, a storage device such as HDD can be used to "swap out" data and later "swap (back) in" as needed.
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How to stop certain Windows games from disabling/bypassing disk read caching? A probable DRM issue
It's now the second game that I've been playing recently which for some reasons makes Windows not use disk cache. I have 64GB of RAM. The game itself eats around 7GB, 2GB are left for the OS, which ...
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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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Cannot browse internet with 48Gb of Ram
I have 48Gb of Highspeed Ram and yet I cannot download from Steam or a site like MyAirBridge without my computer slowing to an absolute crawl. Even moving the mouse around the screen I have stuttering ...
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Why does Win10 not auomaticly grow the page file
The page file size on my Windows 10 64bit with 16GB phyiscal RAM is managed by Windows automaticly. The system tells me that the size is currently 2,38 GB. So the virtual RAM is 18,1 GB.
When I "...
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MacBook is laggy when switching apps
On my MacBook I experience lags when switching apps or when the debugger hits an exception/breakpoint and brings my IDE to the top.
The CPU usage is quite low, as you can see in the following image. ...
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Where are process pages stored - in the swap space or under file system? Can demand paging work without space space?
The Galvin OS text says that on older systems, there used to be a method, where the entire running process (when in idle state) was moved from the main memory (when main memory ran low) to the disk ...
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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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Moving the page file to a different folder
My Windows 8.1 To Go machine is always popping up saying it's low on memory, so I finally decided to make a page file. The problem is, I was going to make it on my largest hard drive on the computer. ...
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Windows paging file size with 100GB RAM
My system has more than 100GB RAM. But when I have too many applications open or Tabs open, I feel the system is slowing down even though the RAM utilization is around 10-15 GB. My paging file size ...
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Understanding virtual machine memory allocation and process virtual memory - Hyper-V
I am trying to understand how the memory demands of my application are imposed on a virtual machine and/or the host computer. The context of this question is Windows 10 guest O/S on (probably) Windows ...
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why physical memory NOT contiguous?
Background: I was running a kernel module that give me some info about kernel virtual address space which told me that Linux lowmem region is approximately 7.24 GB. lowmem region is supposed to be a 1:...
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Sysinternal's VMMap is unable to find injected memory
I'm writing a Python script that uses the Windows API to learn process injection.
The injection is successful. I can verify that the shellcode is running, and Process Explorer shows the connection:
...
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How do I remove/disabled MsMpEng.exe? [duplicate]
My system regularly crashes with the following error in the error log
Windows successfully diagnosed a low virtual memory condition. The following programs consumed the most virtual memory: MsMpEng....
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Esxi not reading all installed memory
So i have esxi with installed memory 12 GB
The vmware reads 8gb only
I have raid hardesk
And SSD THICK PROVISIONS data store
So why the esxi reads only 8GB?
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On Windows (x86), how is the PFN database indexed?
Windows Internals has a section on virtual memory. I understand that the PFN fields in L4 entries, PDPEs, and PDEs refer to the base address of the next level tables, and that the PTE's PFN refers to ...
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How to force Windows 10 to use pagefile on usb-connected SSD?
I have a constantly connected USB SSD disk. I'm never going to disconnect it at runtime. It operates in a "better performance mode", not "quick removal". I can configure pagefile ...
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Windows assigning 4GB of shared Video Memory to my dedicated GPU
I was wondering if there was a way to change the amount of Shared Video Memory automatically allocated to my GPU.
ASUS Prime H310M-A
Intel i5-8400 @ 2.80 GHz
R9 380X @ stock settings
8GB Corsair DDR4 ...
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Why is Windows apparently using HDD instead of SSD as virtual memory?
I'm running a python notebook which is reading big files from disk (stored in HDD) and putting their content into memory.
My computer seems to be using virtual memory, because it is running out of RAM,...
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Using compressed memory under Miniconda container
I am using continuumio/miniconda3:latest as the base image for my container. It looks to be debian based. I run it under Amazon Linux 2. I would like to optimally use compressed memory, perhaps zram, ...
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Page file size in Windows 10
As I have gone through some articles, the virtual memory page file size should be 1.5 multiplied by the RAM size. I am currently using 8GB physical RAM in my laptop. So accordingly the page file ...
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What if the computer programs would know about the existence of each other? [closed]
In modern computers, virtual memory provides a layer of abstraction, thanks to which the program thinks that's it works with the processor itself. I know it's impossible under the conditions of modern ...
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Adding RAM (32GB to 128GB) Windows uses much more memory: why/how/where?
I recently updated a 9900k system with 32GB to 128GB of RAM. After getting rid of useless drivers, at startup, Windows 10 enterprise x64 uses 2.6GB of RAM. After upgrading to 128GB, the memory used is ...
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How to identify PIDs which are writing to SWAP memory in Linux
Server is using swap memory when there is enough RAM is available because of which users are facing intermittent slowness and performance issues.
In the free command I can see that there is 6927mbs of ...
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Why does increasing Virtual Memory not help improve 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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Does increasing ram reduce memory usage percentage in windows 10?
I have i5-9300h processor and 8bg of ram on my laptop and recently have noticed that Chrome and apparently Desktop Windows Manager accounts for maximum memory usage in my task manager. So upgrading my ...
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Why is my browser using so much memory?
I've recently had problems with Firefox running very slowly when I have many tabs open; say 20 tabs. My whole system would slow down.
I decided to give Google Chrome a try, and it started out fine. ...
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Why should I install my programs into my SSD? Shouldn't disk accesses be infrequent after loading to memory?
I'm wondering why people always say to put the Operating System and the program installations on the SSD (as opposed to a larger magnetic disk HDD).
As I understand, in the memory hierarchy, programs ...
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Can you use virtual memory like you can physical RAM if you have an NVMe drive? Are there limitations to this?
I have a program that needs LOTS of RAM to for a computation project I need to run for a weekend. Obviously I don't have supercomputer ram and my limits as a consumer is 32GB.
Windows has memory ...
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What is the Optimal Virtual Memory Size For 8 GB RAM | WIN 10?
I would like to ask experts that What is the optimal Virtual Memory Size For 8 GB RAM | WIN 10 and how you calculate?
I know the system says 1906 MB is recommended but is it enough or I should set ...
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Where has my RAM gone?
I have 8 GB of RAM installed, as you can see here:
… and in Task Manager, it's showing that I'm using around 500 MB.
50% of 8 is 4, so 25% of 8 must be 2. Then why is it telling me that 500 MB is 25%...
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How to resolve APFS overallocation error from volume "VM" without reformatting disk
I ran Disk Utility's First Aid on my drive's APFS container. One of the volumes, called "VM", gives the following warning:
warning: Overallocation Detected on Main device: (26707978+1) bitmap address ...
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How to increase virtual memory in Windows 10
Premiere Pro is complaining when I import more than 120gb of video. I have 240gb ssd, 10gb RAM.
When I increase virtual memory to 15GB, max 30GB, I still getting the low memory import error once the ...
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Set the page/swap file on an external hard disk to save space on the main system disk
My 32-bit Windows 10 machine has a reasonable processor, but limited hardware resources (only 4GB RAM and 28GB local HDD). Windows itself takes up nearly half the disk so I'm using an external 1TB USB ...
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.NET application seems not to be executing some operations when left to sit idle - laggy after sitting idle
I have a .NET application which basically does the following:
Is connected to a bunch of serial devices (~32) via COM ports, and is processing data coming from those devices
When a message is ...
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Virtual Memory and SSD
While studying for the A+ Exam I was reading about SSD's and I thought to myself that if you had a mobo with a low RAM limit you could use a dedicated SSD purely for Virtual RAM. I looked up some ...
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Commited memory keeps going up
So I have been having this problem for over a year, if anyone can help me solve this I would be forever grateful. Seriously.
Upon using my laptop (8Gb of physical memory) for a long time eventually ...
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34 GB of commited memory but no app actually commited that much
Sometimes I encounter Out of memory errors and Windows Event Viewer shows this (translated):
Resource-Exhaustion-Detector: A lack of virtual memory in the system was successfully detected. The ...
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Why do I seem to run out of memory when at 80% memory usage instead of 100%
Both on windows and Linux machines it seems as if memory usage tops out around 80% according to resource monitors. Once memory gets around 80% disk IO starts to shoot up and I can hear the computers ...
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What is the address in Process monitor
Under Process Monitor, if we pick up specific process then choose its property,
under event properties, the process tab shows address for each individual library file and what do these addresses refer ...
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Does macOS compact RAM to save power?
We all know that a modern OS will save power by throttling the CPU (or even putting it to sleep) when it isn't needed. But what about the RAM? After all, DRAM can't be powered-down without losing its ...
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How to drop memory caches in macOS?
In GNU/Linux there's a way to drop_caches.
drop_caches is the command that would flush caches from the main memory.
I don't have such a command in macOS.
How to..?
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Virtual Memory Usage reaches up to 100% Why?
One of my client is having cloud hosting. He has problem of high virtual memory usage:
See the current status
Virtual Memory Usage
20 GB / 20 GB (100%)
Physical Memory Usage
1.82 GB / 5 GB (36.47%)
...
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How to store data in pagefile?
Memory-mapping, e.g. via Python's numpy.memmap, works, albeit temporarily; once pagefile capacity is exceeded, the arrays are silently unmapped from pagefile. Re-mapping each time is undesired - need ...
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Cannot access System Properties (Windows 7)
In Windows 7, I cannot open
Advanced system settings (nor "systempropertiesadvanced.exe")
Computer name, domain and workgroup settings (nor "systempropertiescomputername.exe"
Performance settings (...
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Any risks to greatly increasing pagefile size?
I require 64GB to fit an entire dataset in memory for deep learning, but have only 12GB RAM. Virtual memory being the next-best alternative, I learned it can be effectively increased via increasing ...
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Windows reports "Out of Memory" despite huge pagefile
How to force Windows to use the swap file to the fullest?
I use Windows 7 64-bit and I have 16 GB of RAM + 8 GB (static) pagefile.
When I open many Chrome tabs, and the physical memory is almost ...
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linux kernel virtual space , lowmem , highmem , RAM size
I need some help understanding the exact relations between the linux kernel virtual space , specifically LOWMEM area , and the available RAM size as seen by the kernel.
after reading this article: ...
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PC locks up when RAM oversubscribed
As occasionally happens, my computer locked up today. The screen was frozen, the mouse unresponsive, and there was no response when I pressed Ctrl+Alt+Del and Shift+Ctrl+Esc.
In this case it was the ...
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How does Kernel allocate COMMITTED VIRTUAL MEMORY to a Process
It would be really helpful for me if someone can answer my question.
How does Kernel allocate COMMITTED VIRTUAL MEMORY to a process (jvm process)
what criteria is used to determine how much ...
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How to detect thrashing on an SSD-equipped Windows 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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