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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Linux kernel: page substitution policy

I am supposed to answer for homework which algorithm is implemented in Linux for the virtual memory page substitution and also give some extracts of the code to prove that. After some research I have ...
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1answer
35 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 ...
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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 ...
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4answers
56 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 ...
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0answers
17 views

Can't access my user account!

I have faced the same kind of 'crash' the second time and I am worried. This is what happens: I turn on my laptop. I try to login to my user/account. I type my password, hit 'enter'. Screen goes ...
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5answers
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How can I check my RAM and hard drive for errors?

What tools can I use to check that my memory and hard drive are still working correctly?
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0answers
15 views

Eclipse throws out of memory error, but won't crash if run with SUDO

I have a heavy project I compile via eclipse (android app), strangly it crashes if I run it as a regular user with an out of memory error during complilation, I've updated the ini file to utlize as ...
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1answer
21 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 ...
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1answer
39 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 ...
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1answer
46 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 ...
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3answers
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Why am I frequently getting this “Cannot allocate memory” error?

I'm using Ubuntu 12.10 with Gnome-Classic. I am getting this error frequently and with almost all programs, big and small. When I try to open them, they don't start, and instead I get an error message ...
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1answer
51 views

GIMP memory increasing problem

I have a problem with GIMP in Ubuntu 14.04. When starting GIMP it works perfectly at first, but as soon as I copy a selection of pixels value in "system monitoring > resources > memory and swap ...
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1answer
65 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 ...
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0answers
14 views

Apache2 killing Xen server

I'm running a 512mb Ubuntu 12.04LTS 32bit Xen-based virtual server from a hosting company. The server runs a Shoutcast 128Kbps/32 slot server and sc_trans transcoder, serving an mp3 playlist from the ...
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1answer
32 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. ...
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1answer
22 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 ...
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1answer
59 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. ...
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1answer
32 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. ...
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33 views

Systems is Only Using 4.7 GiB out of 6GiB

I'm running Ubuntu 14.10. So, I've followed all the steps listed here: Ubuntu 14.04 (amd64) not detecting all of my memory And everything seems to be ok. There ARE 6Gib installed on my computer, as ...
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1answer
59 views

Ubuntu 14.04 64 bit slow how to fix?

I upgraded from Ubuntu 12.XX 32 bit to 14.04 64 bit, but the Ubuntu became slow, I have the below CPU specs with 4 GB RAM, what is the solution? salim@salim-desktop:~$ lscpu Architecture: ...
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88 views

Solved: enabling swapping cripples system

I am having a strange issue. Essentially, when swapping is enabled (on a swap partition), the system becomes unusably slow even at times when no swapping is in fact occurring. For example, when ...
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1answer
19 views

How to pause a process until memory requirements drop

I'm compiling source code in the terminal but 75% of the time the build will freeze my system and I have to hard reboot or wait for a LONG time until oom kills it. I'm positive it's a memory issue ...
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2answers
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Ubuntu 14.04 (amd64) not detecting all of my memory

I've got 4gb of RAM installed in my machine but Ubuntu only detects 2.8gb of RAM If I run uname -a I get: Linux DeLillo 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 x86_64 ...
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1answer
17 views

Storing a File in the Memory

If I have a simply php file that will be accessed a lot, is there a way I can configure the file to be present within the RAM at all times, so rather than reloading the file from the hard drive every ...
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1answer
384 views

How to automatically restart an application for using too much RAM or CPU

I'm going to be running an Ubuntu 14.04 LTS server that will have a few Garry's Mod (Half-life 2/Source based) servers running on it. I don't want any one of those servers getting out of line by ...
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2answers
2k views

How to increase the disk space of an Ubuntu VMWare guest, without the cd?

I powered off the VM and on the VMware side increased the allocated disk space. I did this by Edit Virtual Machine Settings -> Hard Disk -> Utilities and so forth. It then warned me that I should ...
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2answers
50 views

How much RAM Does Ubuntu use? [duplicate]

I have a Yoga 2 11( model 20428) and Win8.1 takes about 2 of my 4gb of RAM to run. How much RAM will Ubuntu use to run. This is a secondary laptop, for movie watching, school work, websurfing and ...
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2answers
99 views

No 100% Memory Usage

I've 4 GiB RAM, and System Monitor shows 3.8 GiB. I think 200 MiB is for GPU. But I've never seen Memory usage more than 3.0 GiB. If memory usage is close to 3 GiB, it uses Swap, and when it reaches ...
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0answers
39 views

GPU, Dota 2 or RAM problem?

I knew that i used bleachbit to free my memory.I ticked it accidentally and did it.After i did that, the computer seems to slow down.A few days later i felt that it became slower, so i did a new fresh ...
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0answers
26 views

Live CD and install for 14.04 LTS fails with 256GB of RAM [closed]

Memcheck86 sees the full 256G of RAM, but the live CD fails to load unless we set mem=128G, which appears to work fine. We tried updating GRUB to remove that limit, or increase the value for mem, ...
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1answer
172 views

unity-music-daemon uses large amount of memory

When I boot my Ubuntu 13.04 up, I noticed that my fans goes crazy and when I had a glanced at System Monitor, I saw that a process called unity-music-daemon is using a large amount of memory and CPU. ...
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2answers
51 views

Why can't my laptop use more than 85% of my RAM?

I have 1GB RAM in my notebook (HP Compaq 6735s), but the video card is using 256MB, so I'm left with 768MB RAM. However, whenever my system starts using more than 85% of memory, it becomes unusable. ...
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0answers
19 views

Mount disk with write permissions but leave it untouched

I have a raw image that I would like to mount to my system (Ubuntu 12). The problem is that I don't want to write anything to the disk itself, so the raw image will stay as it was before mounted. I ...
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0answers
7 views

What does it mean for /proc/kpagecount to be zero

for some entries in /proc/kpagecount, all the 64 bit entry is zeros and yet the page is allocated (confirmed from /proc/kpageflags). What does it mean for kpagecount to be zero for certain physical ...
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1answer
166 views

How can I reduce ram usage? And also how can I speed up Ubuntu 14.10?

I just upgraded to Ubuntu 14.10 from 14.04 to find the amount of ram usage has almost doubled well my CPU usage and almost been reduced. When doing little on my computer my ram usage stays at about ...
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1answer
238 views

How can I speed up minecraft after buying more RAM?

My Acer C7 is running Chrubuntu. After I bought an 8GB ram extension, Minecraft is still running with only 5-9 fps. My system shows 9.4 Gigs of ram running, but this still makes no difference to ...
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2answers
5k views

Chrome suddenly using too much memory, what's wrong?

I just upgraded my RAM to double what it used to have and for a couple of weeks everything was running great, but now Chrome is eating all of it, I hit 90% use with only one window and <50 tabs ...
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1answer
35 views

50% of RAM occupied at the beginning

I am using Ubuntu 14.04.1 LTS on a DELL INSPIRON N5050. My problem is that I have 6 GB RAM and from the start of the OS almost 50% of my RAM is occupied. I have to mention that I do not have an ...
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2answers
82 views

Does Zombie process cause memory shortage? Does it killed by init process eventually?

I have zombie process problem and it's a first time I've met it. So I don't know how to solve this problem and concept. I read some article posed 1 year ago (link) and It said like below: There is ...
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3answers
2k views

Ubuntu 13.10 freezes at times; *ERROR* stuck on render ring

My ubuntu 13.10 laptop freezes relatively frequently, after I recently installed it. It is most common while I am playing Minecraft, but I have also had it happen at other times. I think it may be a ...
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0answers
12 views

Ubuntu server 14.04 LTS specific information?

Im new and lost here. Where can I find all ubuntu server general features? like: Processor and Memory Support (Physical memory etc.), network/storage/manageability features? Im trying to find this in ...
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1answer
73 views

Ubuntu 14.04 detects 4 out of 8GB of ram

I've been dual-booting my laptop for about six months now, on one side Ubuntu 14.04 and on the other Windows 7. When I bought this computer two and a half years ago, it had 8gb of ram. My Windows ...
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0answers
19 views

Memory issue. How to identify the root cause using free

I am running two application on my system. When I run two applications in parallel, Memory gets consumed within a few minutes.. [Data below is not actual.. Just for explanation] Initial state.. ...
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1answer
45 views

Do I need to upgrade only the RAM for making Ubuntu's virtual machine quick and smooth as OS X at the same time?

I own a Mac mini Mid 2011. My Mac mini's details: 8GB RAM DDR3 1333 Intel Core i5 2,3 GHz Intel HD Graphics 3000 512 MB I have Ubuntu 14.10 and OS X 10.10 partitions with modified rEFInd, but it's ...
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0answers
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Store realtime system snapshot for boot

Is it possible to do a kind of hibernate but without turn computer off? Create snapshots every 10 minutes (for example) so if it suddenly turn off last state can be restored.
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5answers
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How to permanently enable compressed ram swap? What version to use?

EDIT: In precise there's now zram-config. It's an upstart job compressing up to half of your ram spread over $(number of CPU cores) swap devices. It didn't allways start at boot but issuing sudo ...
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0answers
51 views

Ubuntu 14.04 freezing completely on new netbook

I have some strange problem not letting me ask this question on my laptop, so apologies if I am asking something that has already been asked by someone. I bought laptop with enough capabilities to ...
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2answers
97 views

Can you use your PC with a dead RAM stick?

Just tested my ram with memtest86. Got about 24K errors but I don't have money to buy new RAM!!! I'm just 13 years old. Do you still use your PC if your RAM is dead? And how do I repair this RAM ...
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2answers
45 views

Understand free command with top command

I have a doubt. I start ubuntu and run free command. I will get the total free space available. Let say it as 100MB. Now I run a few applications. So after some time, I again run the free command. ...
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2answers
230 views

How to increase JAVA Heap Size?

I need to increase the default java heap size to get OpenNMS Linkd service running smoothly, and fortunately I have 4/5 of my total installed memory free at any given time even when their is maximum ...