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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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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634 views

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 can I stop `vmmem` process?

I installed docker on windows home which uses WSL2 as a backend. However, ever since I installed a new container on it yesterday my computer fan has been turning on every 5 seconds. I am not sure ...
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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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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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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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Is it possible to set vm.overcommit_memory =1 only for specific containers?

So, I'm running a container that is showing this in the log: WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = ...
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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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Does using a SSD as a sawp damage the component faster? [duplicate]

I know that SSDs have a shorter write lifespan, even tho many say it will last more that the average user would use, I think that using it as virtual memory would burn it out way faster than the usual ...
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Is it possible to reset paging file size in Windows 10?

My pc have 16gb of ram installed and by default pagefile management set to "Automatically manage paging file size for all drives". So the default pagefile.sys size in my case is 2432 mb. At ...
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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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198 views

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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GDB, debug program, during startup program terminated with signal SIGINT, no stack

This might be due to some NFS error, or hardware issue, or so. I had a similar problem in the past a couple of times. My python3 binary is installed via Linuxbrew, and normally runs fine. The binary ...
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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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Debugging Linux Virtual Memory use

I have two nearly identical systems (Ubuntu 14.04 LTS (Trusty Tahr) - yes, not supported anymore, 8 GB RAM) with a home-grown software suite (four JVMs, MySQL, and GlusterFS): One is production, ...
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Shared GPU Memory. Can I turn off this feature?

I am running: Windows 10 Nvidia GTX1070-8GB 24GB System RAM i7 I am running into an issue in my video editor, complaining about depleting the GPU memory. When inspecting my resources, I noted that ...
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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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3k views

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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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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90 views

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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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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246 views

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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1answer
766 views

Process Explorer Reports Processes with 2TB “virtual size” in Windows 10?

This screen snip of Process Explorer shows multiple processes with >2TB "virtual size": This can't mean they are all using 2TB of virtual memory, so I'm wondering just what this means.
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What is the history behind `ulimit -m` / RLIMIT_RSS not working?

According to man setrlimit (which is what man ulimit directs me to), RLIMIT_RSS Specifies the limit (in bytes) of the process's resident set (the number of virtual pages resident in RAM). ...
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338 views

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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314 views

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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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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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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327 views

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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278 views

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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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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145 views

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 does a process like KeePass protect its memory in Windows?

I am looking at KeePass and trying to figure out how it protects its memory exactly. Is it because the use of KeePassLib.Security.ProtectedBinary class for all it's memory allocations or is it ...
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6k views

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 do I have non 64k aligned private memory space?

In windows memory alignment granulatity is 64K, why do I have 4k on 0x7FFEF000? Windows 10 PRO, 11763.316
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Can a same disk be temp for windows and linux?

Is it possible to make a SSD be temp and virtual memory for both windows and linux, without wasting half of the size for the other OS, and be SSD-friendly?
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System that can read hard-drive and exclusively write into RAM?

I hope to be at the right place. I could not find any suggestions on the "web" about my question. How could an O.S, let us say a distribution of linux, can be loaded from the hard-drive and execute ...
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2k views

Windows 10 virtual memory/pagefile discrepancies

My Windows 10 system is using far too much virtual memory How do I stop this? Using HWiNFO64 you can see I currently have about 75 GB of virtual memory on my system and am using a massive 31 GB. The ...
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52 views

Virtual Memory being utilised when plenty of RAM is avalible [duplicate]

I use RainMeter (Desktop Customisation Tool) and It comes with a widget that displays real-time RAM and Virtual Memory usage, and ever since I've had it - it always displays at least 10%-30% SWAP ...
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55 views

Is there a RAM utilization percentage where performance degredations like page faults start to occur significantly more often?

I remember years ago reading a textbook that stated significantly high page faults and other RAM-related issues can occur with constant utilization rates >= X%; it didn't necessary start at just 100%. ...
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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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How guarantee a responsive Desktop using cgroup memory limit

I would like to setup a system with limited memory (raspberry pi) in such a way that application can't cause the desktop (x11, LXDE, openbox, mouse driver, video card driver) to be unresponsive. When ...
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11k views

How to increase memory for a Java application in Windows 10?

I suppose I should to increase a Java heap size for the application. Does Java heap size have a common settings for all Windows 10 applications? Or should I set it for the application I need. How? ...
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984 views

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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