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 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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248 views

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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Understanding windows memory metrics

Windows provides tons of metrics to describe the memory usage of a process. I would like to better understand the meaning of these. I'm particularly interested in committed memory (vs. reserved ...
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Daniel2 codec - not enought RAM after import

I have win7, 10GB RAM, 256GBssd and i7 CPU When I edit videos, I first convert all H.264 to Daniel2 format. This is special codec which allows smooth editing by decreasing weight on CPU. Hovewer, the ...
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146 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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Segurazo ANtivirus Realtime Protection Lite

remove SAntivirus from my pc already removed it from registry I cannot remove delete it from services what can I do now
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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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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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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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289 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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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 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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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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158 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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9 views

Few functions displays 2 languages .. English and Chinease

I run windows 7 recently function keys f8 displays in chinese language and unable to create new user account since windows does not recognize this language.Tried to reset english language numerous ...
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Enormously large in-use dentry cache

We have an EC2 instance that has a very large (50+GB) dentry cache and most of it is in use (99%). "drop_cache" commands (sysctl -w vm.drop_caches=2 or sysctl -w vm.drop_caches=3) don't help much, ...
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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 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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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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127 views

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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978 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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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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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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2k views

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 ...
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29 views

Windows 32bit Ram and PAE [duplicate]

I have been doing some research over the internet about the RAM limit a 32bit system can have, and I'm slightly confused. It was my understanding that a 32bit could only utilize 4gb of RAM, but after ...
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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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1answer
6k 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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1answer
500 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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443 views

macOS - virtual memory limit (architectural or practical)?

Is there a specific limit (configurable, hypothetical) to the amount of memory macOS can use? I know there are several related factors, like addressable RAM, how virtual memory is used by the system, ...
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1answer
2k views

JVM Heap size as a ratio of system physical RAM (Weblogic)

How much should the max JVM heap size be set for a specific size of Physical RAM. e.g. With 8GB RAM, I can set the MAX heap size for a server app as 3GB. This question is specific to Java 1.8 and a ...
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How to identify which process committed memory

My system runs high on committed memory (out of 8GB RAM + 2 GB page file 85% memory is committed). Physical usage is at some 65%. How can I identify what process(es) is allocating most of the ...
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1answer
119 views

Excessive virtual memory/page file - Can I tone it down for space?

Relevant specifications Windows 8.1 enterprise (not my choice) 16GB RAM 128GB SSD (actual capacity: 118GB) Problem The laptop is used for fairly lightweight data office work. The hardest I'm ever ...
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28 views

What would cause a Windows VM to consume native host disk space?

So, I've got a Windows10 virtual machine running on macOS via VMware Fusion. It's just the common, freely available Windows development VM. It's been allocated a significant portion of the hosts ...
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677 views

Is there way to detect Page file size change source within Windows 7?

In the office, I do my work on a Windows 7 machine that has 16GB on RAM. However, after each restart it automatically sets the pagefile to 3072MB. I have created a delayed schedule task (which calls a ...
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72 views

Generate dump file/report when low virtual memory occurs

I'm currently investigating an issue that we're having with low virtual memory on Windows 10 IoT Enterprise and I'm trying to track down the process that is causing it. There's an app that's running ...
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73 views

Windows 10 svchost using 24 gigs of memory

On windows 10 one of our users is getting a virtual memory error. Upon investigation, svchost is using 24 gigs of memory. When I do a memory dump and run a memory analysis using windows debugging ...
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1k views

How to setup the paging file (virtual memory) correctly on Windows Server 2012

I am trying to create 10GB virtual memory on my Windows Server 2012 R2 machine. I have a 40GB SSD disk. I've done it already, but at last I see that I have 10GB only available from my 40GB disk... ...
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The “memory available” that an Operating System tells child processes

I'm wondering about how operating systems let child processes know how much available memory there is. Say the whole computer has 1GB RAM memory built in. The operating runs and uses 100MB (I have no ...

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