Random-access memory (RAM) is a form of computer data storage. Today, it takes the form of integrated circuits that allow stored data to be accessed in any order with a worst case performance of constant time.

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160 views

restrict memory usage to prevent swapping

I have an SSD and 8GB memory, and no swap partition. My normal use never ever needs more than 3-4GB. However from time to time I observed that some memory-leaking programs can still freeze the system ...
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25 views

Where does the kernel file dump_pagetables.c dump the data of the page tables?

I m working on a project to do memory allocation in the kernel. I would like to know how the virtual memory is allocated presently in the dump_pagetables.c file.
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0answers
813 views

ZFS - Always Out of Memory

I read that ZFS was set to use all physical memory except 1GB on systems that have 4GB or more. Since I have virtual machines running my home-server that is running the ZFS filesystem, I wanted to ...
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0answers
66 views

Get OS Process List with Volatility From a memory dump

I am wondering if anyone can help me I am trying to figure out how to get a count of the processes that were running in the OS process list using volatility from a ram dump. $python vol.py pslist -f ...
3
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0answers
82 views

“-/+ buffers/cache memory” is zero

i have an OpenVZ VPS with ubuntu server 14.04.2 and i can access to a SolusVM control panel. Recently, "memory usage" is always 0 KB, and only "vswap usage" shows real swap usage. if i run free -k i ...
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1answer
4k views

Could I install Ubuntu on SD card and runt it from my Chromebook?

So I just installed Ubuntu on my Chromebook. Now the main issue is that the internal memory is limited. I am thinking of using a 64 GB SD card to expend the memory. Would it run as smooth as it does ...
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0answers
98 views

Ubuntu 12.04 only recognising 2.9Gb Ram out of 4Gb

Yes it is a 32-bit installation, but there is supposed to be PAE that allows it to use all of the ram. The command: sudo lshw -class memory | grep GiB -m 1 Tells me that yes there is 4Gb ...
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0answers
40 views

Prepare for a huge computational script (RAM, SWAP…)

I run lots of python scripts on my laptop, but this time the situation is tricky. I need to read dump files, and perform huge calculations, so I need a lot of RAM and space. A crude calculation ...
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1answer
38 views

How to check if there is already a swap area?

I am using Ubuntu 14.04 on my laptop with 4 GB RAM. I had chosen option to "replace Windows 8 and install Ubuntu with LVM" when installing Ubuntu. Now I wanted to create a swap partition, I executed ...
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1answer
92 views

Virtual RAM folder in Ubuntu?

I would like to have a folder mounted as temporary, which is actually my RAM. This is so that, for example, I could copy a movie into my RAM, unplug my external drive, and then watch it. Can this be ...
0
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1answer
132 views

Ubuntu 14.04 RAM not usable — mallocate problem

I have a strange situation where my Ubuntu server (14.04) is not recognizing all of the memory installed in my server. I have a HP Proliant DL 380 G3 server (32bit) with 10 GB memory. I couldn't use ...
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1answer
266 views

Is it possible to limit cache memory to a process?

I am using network capture tool named dumpcap and it is consuming too much cache memory. So other processes getting no memory to run. htop command shown cache memory as 29 GB in Meters. Can ...
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0answers
69 views

automate processes based on priority and memory size.

I have written a script to output vmstat etc according to user input and have also written a script for process control based on user input. the process script allows the user to use a series of menu ...
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2answers
144 views

record of swap/memory usage - how to do it?

Here is a quick intro to the problem, but if you're interested only on the question, I think you may skip to the last paragraph. I have installed Ubuntu Mate on my laptop with the recommended amount ...
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0answers
21 views

Virtualization hardware review

I'm running an home server based on Ubuntu 14.10 for running some services that I need on my LAN such as: mysql db, LAMP stack, NFS share, Squid proxy and so. My machine is built on Intel(R) ...
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2answers
10k views

How do I run memtest86+?

If I encounter a situation where I suspect my machine's RAM might be going bad, I might need to launch memtest86+ to check it. How can I do this using Ubuntu? Are there different methods for launching ...
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0answers
169 views

My laptop very slow, Is the problem with Hard Disk or RAM ( very low Timing cached reads value)

My laptop has been running very slow, I reinstalled Ubuntu and also tried Windows but didn’t find any difference. I thought this could be a problem with my HD. I tried the below tests with hdparm ...
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1answer
99 views

Real & accurate memory usage statistics (top)?

Need accurate memory usage statistics to figure out what size matrix I can work with without choking the RAM on this laptop. ;) I am using top to figure out how much memory an app I'm working on is ...
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1answer
1k views

How do I know how much RAM can I upgrade my laptop?

I have a HP Pavilion laptop quite old (2008) which I would like to increase the RAM. Ideally I would like to have 8Gb but I have no idea how to check if hardware could support this extension. These ...
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0answers
20 views

Desktop computer slowdown on heavy loads

In Linux generally, is it possible to limit cpu, ram and iops(hdd,nic..) given for processes not belonging to core operating system, including system libraries, X server, system utilities, user ...
0
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0answers
85 views

Why my memory is shooting to nearly 100 percent which makes my laptop unable to work?

I am a newbie. I am currently using xubuntu 14.04 on my old dell laptop (~8-9 years old). When ever i watch any video on YouTube or similar site the video is not coming properly. I am not able to do ...
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0answers
19 views

Ubuntu VM shows different RAM then what vCenter is showing

I created a 64-bit VM with 4 GB of RAM and installed Ubuntu 14.04 64-bit The command, free –g, shows a total of 3GB The details screen on the desktop shows 3.9 GB vCenter Server Performance Monitor ...
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2answers
359 views

Gluglug ThinkPad X200 Ubuntu?

I'm looking at buying the Lenovo ThinkPad X200 from Gluglug (http://shop.gluglug.org.uk/product/libreboot-x200/) and they say they have Libreboot so you can install any OS, but I'm wondering if the ...
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0answers
29 views

Wrong amount of memory show in Settings -> Details in Ubuntu 14.04 [duplicate]

I have installed 4Gb as two modules but only 2.9Gb is shown in Settings.
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1answer
412 views

Zcache Usage in Lubuntu

Recently I appended zcache to my grub configuration: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash zcache" But I am at a loss as to whether zcache is working or if I need to do something else. There is ...
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1answer
60 views

How to free up my laptop's RAM?

I have an old DELL laptop with 2GB of RAM and Ubuntu 14.04 (64-bit) as its OS. Many times I am out of RAM and thus every thing goes very slow! I think there is many background programs (services or ...
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2answers
245 views

RAM memory size info confusion; F2 key or “System Setting”?

I am receiving two different figures for my RAM size. I have installed 2x2GB RAM and F2 key says I have 4028MB but Ubuntu System Setting "Detail" aka "About this computer" says I only have 2,9G. I ...
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2answers
414 views

Why do programs (including Xorg) close when out of RAM but Swap is near empty?

I have some swap configured and I believe activated... Filename Type Size Used Priority /dev/sda5 partition 7811068 1124912 200 ...
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1answer
61 views

Can I install 8gb of memory to full Macbook 5,1 Ubuntu install?

Seems that 8gb of memory is not stable in original Macbook 5,1 if I'm not running "Mac OS X 10.6 "Snow Leopard" or higher and have Boot ROM Version MB51.007D.B03" ...
0
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1answer
39 views

Theoretical question about memory usage

I'm wondering about following issue: Taken some abc console(no matter if bash,zsh or something) in some *nix system. If I start some process stuff which uses 2MB of memory and then launch second ...
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0answers
85 views

httpd process high memory utilization

My httpd process is utilizing high memory per process. My site is php coded and create on drupal as a content management system. We have a high end server with 8 cores and 16 gb RAM. my per process ...
1
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0answers
278 views

X.org is allocating more than 900MB of RAM but xrestop says ~1/40th of that is actually used; how I force it to free the rest without restarting X?

So X.org is allocating an insane amount of RAM: right now 910MB (according to the RES column in htop), second only to Firefox (really Nightly) (at just over 1GB) and trailed by GNOME Shell (at only ...
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0answers
161 views

swap memory value / percentage meaning

Swap memory can be set between 0 to 100 What Does It means when we set swap memory to .. ? swappiness= 0 Tells the kernel to avoid swapping processes out of physical memory for as long as ...
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1answer
308 views

4GB RAM installed, Ubuntu shows 2.5GB

Lenovo ThinkPad E430, hardware is straight from the vendor, untouched. There are 4GB RAM installed, one card. Yesterday I discovered Ubuntu sees only 2.5GB. BIOS detects 4GB RAM. The system is 64bit ...
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1answer
365 views

ubuntu 14.04 server memory problems

I'm getting this weird memory problem that causes massive slow down on any programs but doesnt want to go away till reboot. so when i do htop the memory usage shows half my ram is used but if i do ...
0
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1answer
743 views

Ubuntu 14.04 LTS 64-bit only shows 4GB RAM out of 8GB recognized [closed]

I have two memory cards of 4GB = 8GB RAM installed and Ubuntu 14.04 LTS 64-bit only shows 4GB RAM. How can I make it show the whole 8GB? You can see the details below, I have also included some ...
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2answers
262 views

Can i use Ubuntu 14.04 32bit on 4GB ram? [duplicate]

like the title, if yes it can use all my RAM if needed ? or max just 2GB
0
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1answer
78 views

Xubuntu won't start when using 4Gb Ram

So here is the situation, I was using Ubuntu 14.04 32 bits. Removed everything from the partition I had and created an additional Swap partition and installed Xubuntu 14.04 64 bits. When booting I can ...
4
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1answer
221 views

How to Setup tempfs/RAM Disk (Generally and for LuaLaTeX)?

I've spent the past several hours (not few, several!) reading different pages and questions on how to setup a tmpfs/RAMDisk. They all say different things and say what filesystems I should and ...
1
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2answers
305 views

Gnome System Monitor shows only 5.7 GiB RAM of 8GB installed

Some time ago, I reinstalled Ubuntu, like I did a lot of time before. Since then, Gnome System Monitor and System Information (and any other graphical tool I tried, for that matter) show only 5,7 GiB ...
3
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0answers
126 views

Lubuntu: text on system menus/bars appears blurred when memory usage is high

I have an old system (Core 2 Duo 2.0 GHz, 3 GB RAM), running Lubuntu 14.10. When I run memory intensive applications, the text on title-bars, menu-bars and notification panels appears extremely blurry ...
1
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4answers
1k views

How to optimize RAM memory in Ubuntu 12.04?

Good day everyone and merry Christmas. I am worried about RAM memory. The Internet goes slowly. I work with pictures and videos but pictures are stored in a Pendrive. I have 2Gib of RAM but I think ...
0
votes
1answer
228 views

System consumes all memory even after hardware upgrade

Previously, I had a 4GB RAM server with Linode. Several times, I did "free -m" command to check available memory. Most of the times it showed less than 200 Mb free. Major processes I am running ...
1
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1answer
478 views

8GB RAM is fullfilled, addressed /tmp /var/log into RAM

Ok, so I have 8GB memory and 30GB msata storage + some external drives... 30GB for ubuntu, no SWAP partition, only main / Updated fstab to store /tmp and /var/log into RAM and Firefox caching into ...
2
votes
1answer
111 views

RAM not fully usable in 64-bit Ubuntu GNU/Linux

Greetings Ubuntu Community, I have 4 GB of DDR2 RAM and an x86_64 CPU and Ubuntu OS. When I am in Ubuntu I notice from the details section in settings that I have 3.86 GB of RAM when I am sure that I ...
5
votes
1answer
589 views

How to prevent my system from becoming unresponsive when thrashing (out of RAM)?

I have 8GB of RAM, but sometimes I'm running a couple VMs and enough Chrome processes to use up most of my memory. That's usually fine, but sometimes my system starts thrashing, and it's difficult ...
0
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1answer
1k views

Apache eating up 2GB of RAM

I have a 1GB VPS server running 12.0.4 ubuntu. Everything works just fine, most of time my RAM usage shows around 700 MB. However every week or so at random time Server goes out of memory and crashes. ...
0
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1answer
162 views

How to solve low memory problem in ubuntu 12.04?

i installed ubuntu12.04 amd64 version inside windows using wubi in a partition of 8GB, and in GParted it shows that 5.12GB used and 3.10 GB unused, The problem is it always shows a message box of low ...
0
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1answer
189 views

What is the maximum RAM supported by the desktop and server editions?

I have just downloaded "ubuntu-14.04.1-desktop-amd64.iso" and "ubuntu-14.04.1-server-amd64.iso" through "http://www.ubuntu.com/". Please can someone confirm the maximum RAM that is supported. ...
0
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1answer
190 views

Ubuntu 14.10 showing less space in “home” folder than it should

The "home" folder has 100GB. With all my stuff there, it should've had 90GB at most. But now it's displaying 34GB available? I downloaded some source files from Github, but deleted them afterwards. ...