Questions tagged [memory]

RAM (random access memory), either RAM hardware or software and operating system use of RAM.

1,684 questions with no upvoted or accepted answers
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7
votes
1answer
146 views

Can I crop an image without fully loading it into memory?

I managed to generate a PNG image with a fractal. The image is 65,536 pixels high and 65,536 pixels wide. It’s too big to be decoded into memory and displayed. It has probably a lot of unused space ...
7
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1answer
673 views

Enabling Intel HD Graphics can increase memory speed?

I found that enabling Intel HD Graphics in device manager can increase memory speed about 17%. I also used Prime95 to test memory speed, and same result is found. (Prime95 results are highly dependent ...
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0answers
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What to do about the vmmap process in Mac OS X always hogging the CPU?

I am running Mac OS X 10.13.5 High Sierra, and I have always had my Activity Monitor up. My computer would every now and then freeze for a few seconds completely and then act normal again. When this ...
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3answers
27k views

No POST screen, No beeps and No display

I have very old motherboard , CPU , power supply. Motherboard : Gigabyte G31M-ES2C CPU : Intel Pentium Dual Core E2160 @ 1.8GHz Ram : Transcend 2GB ddr2 800MHz. Power supply : Tech-Com 450Watt....
5
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1answer
711 views

Linux hangs when it runs on out of memory

I am getting unexpected behaviour when my machine runs out of memory. I have a Intel i7-6700 with 32GB of RAM and I'm running Arch Linux with vanilla 4.14.8 kernel. I have a 32GB swap on a encrypted ...
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0answers
600 views

How to load entire process memory from swap quickly (linux)?

I run a bunch of CPU-hungry processes in parallel; they normally use a few GB of memory each. From time to time they allocate large amount of memory too (say 150-250GB). Usually at most one of the ...
5
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1answer
2k views

Possible to save process as dump file to disk and then reload the process later?

Is it possible to save process as dump file to disk and then reload the process later? For example if I'm using a video editing program and are in the middle of rendering a file, then I can go to ...
5
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1answer
1k views

What is exactly shown by “perf” as page-faults?

I want to count the number of disk accesses during a complete run of my script. My bash script runs 2 other executable files locally and 2 other executable files remotely. Something like this (those ...
4
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0answers
769 views

Any way to get Linux to dump stack info for a process before oom-killing it?

Trying to debug an infrequent (albeit painful) oom-killed HTTP process on a Centos 6 box. I get the usual in logs: Out of memory: Kill process 14466 (httpd) score 405 or sacrifice child And the ...
4
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1answer
2k views

Samba eats RAM?

I don't really know what's going on here at the moment: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1272 root 20 0 3829868 3.312g 1860 D 0.7 93.0 512:39.94 ...
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0answers
284 views

OSX Memory readings from vm_stat and Activity Monitor.app do not agree

I am trying to write a script to monitor memory status. Here is what I have so far: # Memory Usage ramactive=$(vm_stat | grep "Pages active" | while read a b c; do echo "$((${c%?}*4096/1024/1024))"; ...
4
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0answers
873 views

Disable memory compression in Mac OS X for specific application?

Is there any way to disable the memory compression in Mac OS X for a specific application? I read how to disable it in general at Disable compressed memory in Mac OS 10.9 Mavericks? , but in my case ...
4
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1answer
27k views

Suddenly getting bsod memory management issue after Updating to windows 10

I recently upgraded to windows 10, most things seemd to work fine, aside from a few issues here and there which was easily resolved. Thou i had to reinstall the Nvivida Driver for the graphic card. (...
4
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0answers
1k views

Process tree CPU history usage, process tree memory usage (aggregated) on Windows 8.1

This question is general for Windows OS, but I would like to see a software for Windows 8.1, since this is what I use. I'm looking for software, that will take a process tree (e.g. Chrome.exe ...
4
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2answers
1k views

Optimum Swappiness for a Linux System

I have a 64-Bit Linux PC with 4 GB of RAM. How can I find the optimum value of swappiness (/proc/sys/vm/swappiness) to be set? The default is 60 and I don't think it works best for everyone. I am ...
4
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1answer
4k views

How can I change the amount of video memory with a Mobile Intel 4 Series Express Chipset?

I have the chipset in the title. The Intel control panel says the following: Intel® Graphics Media Accelerator Driver for Mobile Report Report Date: 8/11/2010 Report Time[hr:mm:ss]: ...
4
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1answer
511 views

Report Linux memory cache content

Is there a way to report the contents of the file cache held on RAM?
3
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1answer
60 views

Using R on Windows Server 2012R2 not using more memory

I have a question regarding R and RStudio on my Windows Server 2012 R2 Datacenter. I access the server directly and the server has 128GB RAM. But when I run my R-script, the task manager shows me, R ...
3
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1answer
114 views

Windows 10 - Nonsense memory usage

Let's start this off with saying that I know exactly how things work in computer and by memory leak I mean a piece of data stored in memory that is accidentally put there or put there for reason but ...
3
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0answers
23 views

Apache server consume more memory while Apache log split

Issue 1: Apache consuming more than 50% memory within 1 minute on specific time by every day I have checked this issue in details by verify apache log and also review all files from my code but now ...
3
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0answers
115 views

Can I add RAM to my Linux system when it is hibernated

As far as the BIOS is concerned, when my Linux laptop (ASUSTeK Computer Inc. K53E, submodel X53E-SX806X) is hibernated, it is switched off. There is no difference from a hardware perspective, unlike ...
3
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0answers
49 views

How can I make visible cursor footprints/ghosts disappear from the command prompt in Windows?

That's the problem I'm having while running gdb in cmd under Windows 10. This isn't a question about gdb usage. The cursor's footprint (when visible) is stamped on each line that's created within gdb ...
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0answers
1k views

Why is mac process “Wi-Fi” using 500mb of RAM?

Thanks to this question, I now understand the existence of the "Wi-Fi" process running in the background on my mac. But why does it require 500+ MB of RAM when neither the menu item nor any dialogues ...
3
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0answers
2k views

Unable to activate Memory Integrity in Windows 10 Pro

I am trying to enable Memory Integrity on my Windows 10 Pro v1809 but I receive the following error: Memory integrity can't be started. There may be an incompatibility on your device. I have checked ...
3
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2answers
953 views

memtest86 doesn't seem to be testing all RAM memory

About a year ago I started getting application crashes and using memtest86 found one memory module had errors. This was one 2GB module in an 8GB configuration. It was under warranty so I got a ...
3
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0answers
634 views

Bad sectors in RAM, fixed or not?

So I have blocked some bad memory range from RAM memory. My Question is the next one, I have done it right? Here you have the info: C:\Windows\system32>bcdedit /set badmemorylist 0xFC 0xFD 0xFE ...
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0answers
999 views

Windows 10 hangs for 1 second while typing

My laptop recently started having an unusual issue: whenever I'm typing, it will randomly freeze for about 0.5 to 2 seconds, after that, it will resume working and also catch up on all the text I've ...
3
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0answers
504 views

How to troubleshoot leaking memory in Explorer.exe (Win 10 x64 1709)

The explorer.exe process in my installation of Windows 10 64bit 1709 (Microsoft Windows [Version 10.0.16299.125]) is leaking memory. As the time passes both the Private Bytes and the Working Set is ...
3
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0answers
136 views

What is compressed memory expressed as in relation to memory?

Compressed memory is obviously memory that is compressed to save space, but the macOS utility Activity Monitor and the UNIX utility top are ambiguous about what compressed memory is expressed as in ...
3
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0answers
78 views

How to force processes to be reloaded back into memory from swap?

I have a nightly cron job that does a lot of data import and database inserts on my personal laptop. It runs for a couple hours, but it uses enough memory that come morning, my Gnome desktop is frozen ...
3
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0answers
617 views

Two systems with identical GPUs, have very different performances when running Tensorflow script on GPU

I have two computers with the same GPU(GTX 1080), installed the same copy of OS and softwares. But when I run my tensorflow program(an RNN model), the speed are very different. One is about 1.5x ...
3
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0answers
65 views

Why does it take so long to recover from a terminated program that had consumed all memory?

Every once in a while I run a certain program (MATLAB) and it takes up too much memory. At this stage the physical mem is at ~100% and the computer barely works. I then terminate MATLAB and I can ...
3
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1answer
2k views

Windows 10 reboots without blue screen or crash dump

UPDATE: Eight and a half months later, the problem persists, but now happens every time a VM is started, whether from BlueStacks, Vagrant, or just starting up from the VirtualBox console. The stop ...
3
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0answers
309 views

meminfo values does not add up

I am investigating a memory issue of in my system. The following is /proc/meminfo: $ cat /proc/meminfo MemTotal: 32869176 kB MemFree: 1495144 kB Buffers: 15052 kB Cached: ...
3
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2answers
541 views

Measure ram usage in Windows 10

I'm currently writing a report of an application and I want to know its memory usage. Windows 10 has a nice feature that compresses memory that is not in process working sets in order to manage more ...
3
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0answers
328 views

What does atop 'cache' output really mean?

The atop man page says: An occupation percentage of 90% is considered 'critical'. Notice that this occupation percentage is the accumulated memory consumption of the kernel (including slab) and ...
3
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0answers
318 views

kswapd uses 100% of one core, no swap in system. Possible _raw_spin_lock kernel bug. No solution for long time

Sometimes kswapd0 uses 100% of one core. This issue happens during all 4.0+ kernels. drop_caches didn't work. Adding swap didn't work. There is no rule when problem appears. It can wait 1-2 weeks. It ...
3
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0answers
524 views

Memory Usage of `yum update`

I was updating a slightly out of date server with yum update and ran into memory issues. It appears that yum requires enough free RAM to download each package. Updating single packages was not a ...
3
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1answer
378 views

Windows 8.1 Low Memory Error, Memory Commit Charge near 100%

I've a client with a Lenovo A540 All-in-one, 8GB RAM, 1TB SSD drive, Win 8.1. She is occasionally getting low memory errors. The computer is relatively new, has had an active BitDefender ...
3
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2answers
5k views

How to view total CPU and memory usage of per system user in Linux

I know the top command to see the process of CPU and memory usage, but some users of the system can generate a lot of processes, if I wanna know total CPU and memory usage of an user,I must count it ...
3
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0answers
60 views

Making sure linux uses all my hardware correctly

I have a new decent computer coming my way in a week or so, and I have a few worries. I never had to care about installing Linux before as all my hardware was pretty low standard, but now I'll be ...
3
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0answers
1k views

Should the CPU usage go up to 100% when swap happens on Linux

I had been running a demo system on Linux with the following kernel: 2.6.32-400.1.1.el5uek #1 SMP Mon Jun 25 20:25:08 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux And as soon as swap happens, the CPU ...
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0answers
3k views

Virtualbox: How to use VBoxBalloonCtrl

I am running some virtual machines with Oracle Virtualbox 4.3.10, and they have guest additions installed. I know that you can manually balloon (take away unused memory from the guest) RAM with ...
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0answers
119 views

Utilizing the full power of my workstation

I am not a gamer. Used to be, 10+ years ago. My workstation is strictly for business: Quickbooks Excel Access General Business QuickBooks is tied to a synchronization engine that is synchronizing, ...
3
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1answer
2k views

How to increase video memory for virtual machine?

I have a Linux host running Windows 7 in a Virtualbox guest. I am trying to enable 3D accelerated functionality in Adobe Photoshop CC running on that guest, which requires at least 512MB of VRAM. ...
3
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0answers
98 views

Seemingly inconsistent output from `top` re: Swap header vs. SWAP column

How should I interpret this seemingly inconsistent output from top re: swap? Running free confirms that no swap space is in use: $ free -m total used free shared ...
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0answers
1k views

What are valid reasons to monitor MemFree or Active as opposed to MemUsable?

How to monitor memory usage for alarming purpose talks about the reasons to use MemUsable as the proper metric for alarming on memory, however I still see a lot of instances of alarming on Active or ...
3
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1answer
588 views

OS X “Swap used”

I'm a bit confused here, I'm trying to open a tab in Chrome and sometimes it takes few seconds while freezing my computer significantly so that I can't use even to bring Dock menu... I even closed ...
3
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0answers
3k views

Max RAM: CPU vs Motherboard

Looking to put together a cheap(er) server/workstation for doing some big statistical analysis. Right now, it's running on a machine with 16gb and we're using 40gb of swap. So I want to maximize ...
3
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1answer
315 views

Use /dev/shm sometimes crashes applications

Sometimes I use /dev/shm for temporary files, as big as 500MB, (I have 8 GB RAM - Ubuntu 11.04 x86-64) and when I load StarCraft II (with wine) I might get memory errors in the game (corrupted data or ...