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.

learn more… | top users | synonyms (1)

0
votes
1answer
1k views

/can you install ubuntu to hdd but it runs completely from ram while hdd is not spinning?

my main purpose is to be able to install ubuntu to the hard disc so that my settings and everything are saved but i want it to load itself to my ram for faster operation and better battery life while ...
1
vote
1answer
742 views

Ubuntu 12.10 x64 Doesn't detect RAM properly

I have 6 GB installed, which as a 64-bit OS, it should see, but it only sees 3.5 GB! How do I remedy this? Output as requested: seann@seann:~$ dmidecode --type memory | grep -E ...
0
votes
2answers
543 views

Reccomended upgrade for Ram Ubuntu 12.04

I am running Ubuntu 12.04 32 bit on my laptop (Toshiba Sattelite L-450), the spec is as follows Memory: 2.8gb Intel® Celeron(R) CPU 900 @ 2.20GHz Graphics Mobile Intel® GM45 Express Chipset ...
2
votes
0answers
137 views

Why do I run out of memory even when nothing is running?

I am currently facing a problem that when I run Uclust, it keeps showing me mymalloc running ot of memory. The thing is that cuurently nothing is running in the system and my memory shows I am ...
2
votes
2answers
174 views

Ubuntu does not detects the RAM correctly

I have 512MB RAM in my PC. Ubuntu detects only 495 MiB. How can I fix this? On Debian Squeeze, I have 512MB.(The correct size) OS: Ubuntu 12.04 Precise Pangolin
4
votes
2answers
897 views

2 GB Ram, but Ubuntu runs slowly and hangs if doing too much

I think my system more than meets the minimum/recommended requirements for Ubuntu, but its still running slowly. Especially when I try to multitask by having 4-6 windows open, then it becomes quite ...
1
vote
1answer
42 views

Deleting files from connected devices doesn't free the device's storage

A few weeks ago, I bought my tablet and copied files from my computer running Ubuntu 12.04. Somehow, I had to delete some of these copied files to free some memory. But upon deletion from my computer, ...
1
vote
0answers
124 views

Disk cache is sometimes dropped/erased

I have a memory/cpu monitor running, and sometimes see the graph line for “cached memory” drop, for no apparent reason. Earlier today Cache memory was at about 4.8GB but then dropped in two steps ( a ...
1
vote
1answer
147 views

The limits is restored to the defaults after I reboot

I want to remove "memorylocked" and "maxproc" limits. I am using tcsh shell. I read that if I use "#limit memorylocked unlimited" and "#limit maxproc unlimited" then they will be set to unlimited. I ...
0
votes
3answers
149 views

What are the most suitable distribution Ubuntu for my computer? [duplicate]

Possible Duplicate: How do I find out which version and derivate of Ubuntu is right for my hardware in terms of minimal system requirements? I'm looking to migrate from Windows XP to Ubuntu ...
1
vote
0answers
16 views

System Monitor disagrees with 'free -m' [duplicate]

Possible Duplicate: System monitor (panel) shows the wrong amount of used ram When I start up my computer, free -m says I have about 1800MB allocated and 150MB free. In System Monitor, it ...
3
votes
1answer
2k views

How and why should I specify mtrr_gran_size/mtrr_chunk_size?

I noticed today that /var/log/dmesg contains several dozen lines with information about something called gran_size and *BAD*gran_size, followed by what appears to be an instruction for me: [ ...
1
vote
2answers
238 views

Sluggish desktop/Unity performance on ThinkPad Edge

Fresh (1 week old) install of Ubuntu 12.10 64 bit version on a ThinkPad Edge 15, specs as follows: System specs (site wouldn't let me hotlink the image) I think the swap is about 2GB but can't ...
6
votes
3answers
2k views

How do I know which RAM I'm using?

I want to buy some extra RAM but Hardinfo wont tell me which brand, model, latency and speed I'm currently using to buy the same kind. What else can I use?
3
votes
2answers
208 views

Not recognising 4GB of RAM

I have a pae kernel but free -m only shows 3.2 Gigs of the 4 GB that is physically installed. The BIOS shows 4 GB available. uname -a gives: 3.2.0-35-generic-pae #55-Ubuntu SMP Wed Dec 5 18:04:39 UTC ...
0
votes
1answer
360 views

Ubuntu 12.04.1 (64bit) only recognizes 7.8gb of RAM from 8gb RAM

I know that is a little diference between 7.8gb to 8gb, but still a diference, why Ubuntu dont recognizes all of my RAM? I had the same case with my 32 bit Pc, 3gb RAM and Ubuntu only recognized ...
1
vote
1answer
304 views

Warning when available RAM approaches zero

This is a follow-up to Memory limiting solutions for greedy applications that can crash OS?: ulimit and cgroups are not user friendly, and besides, wouldn't work with applications that spawn separate ...
2
votes
1answer
577 views

Getting specific 'Out of memory!' message when running very involved Perl script [closed]

I'm running a Perl script that parses information from around 7,000 HTML files. Probably not really relevant, but I'm just trying to describe that this is, well, doing a lot of stuff. I originally had ...
1
vote
1answer
544 views

java not allowing for the use of all 8gb of ram

I have a 32bit version of Ubuntu server with PAE active allow for the full use of the 8gb of RAM but I can't use more than 2gb of RAM in Java. I run the command java -Xms6G -Xmx7G -jar server.jar ...
0
votes
1answer
4k views

Optimization: RAM cleaning and monitoring

Is there any good tools for ram cleaning-purging? I mean some daemon, that watch on RAM and trying to purge some, if it reached the limit? Thanks!
0
votes
1answer
111 views

Fresh ubuntu installation - memory usage went from 3% to 41% - should I be concerned and how to remedy?

My memory usage was a 4% after a fresh ubuntu 12.10 installation after i install php packages etc using this gist, https://gist.github.com/4372049 my memory usage now reached 41%. should i be ...
0
votes
1answer
1k views

Ardour, system has a limit for maximum amount of locked memory

After installing and starting Ardour I receive the following warning message: WARNING: Your system has a limit for maximum amount of locked memory. This might cause Ardour to run out of memory ...
0
votes
1answer
84 views

Problems booting because the HDD is full. How can I get stuff off my hard drive?

I have used up all the space on my hard drive and when starting up the computer says the only option I have is to start up in basic graphics mode. On the screen it then says stopping system v runlevel ...
1
vote
1answer
28 views

Dbuses and Apaches are using up memory

I recently noticed, in System Monitor, that multiple Apache2 processes are showing up (with the same "Command Line"). There are currently 6 of them, each with 7MB memory. I also noticed a whole bunch ...
1
vote
0answers
50 views

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 ...
0
votes
1answer
1k views

Average memory usage after complete ubuntu 12.04 start up

When it starts up completely, I cas see that about 400-500MB of my 2GB Ram is being used. Right now that I have only started Firefox (and System monitor), I can see that about 1GB of ram is full with ...
8
votes
3answers
3k views

How to read correctly “free -m” output?

The output of free -m: total used free shared buffers cached Mem: 595 482 112 0 63 324 -/+ ...
6
votes
3answers
686 views

How does landscape calculate memory usage?

I'm trying to debug an OOM situation in an Ubuntu 12.04 server, and looking at the Memory graphs in Landscape, I noticed that there wasn't any serious memory usage spike. Then I looked at the output ...
2
votes
0answers
226 views

Ubuntu 12.04 tilts when trying to open large excel file with libreoffice or matlab

I have an xlsx-file of size 27.3MB and when I try to open it either in Libreoffice or Matlab the whole system slows down My processor is AMD Sempron(tm) 140 Processor (should be about 2.7Ghz) Memory ...
3
votes
2answers
4k views

Ubuntu 12.10 and VMware Workstation 9: RAM caching causes severe performance drops

I have read plenty of threads on memory caching and the standard response of "large cache is good, it shouldn't effect performance", "the kernel knows best". I have recently upgraded from 12.04 to ...
-1
votes
1answer
154 views

10GB installed but only 7.8 is shown

I installed 10GB but my 12.04 LTS 64-bit shows only 10GB. But the swap shows 10GB so I think internally it did find 10GB? I don't remember exactly how Ubunt calculate how much swap needs by default, ...
3
votes
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 ...
0
votes
2answers
717 views

Random memory corruption going undetected by memtest86

Thinkpad t520; Ubuntu 12.04.1 LTS; 3.2.0-33-generic; 16GB of ram. Memtest86+ ran for 26 hours, 9 passes, no errors. Booted into "recovery mode": ran fsck all filesystems - no errors; "check all ...
4
votes
1answer
284 views

Ubuntu gets slower by the day

Ive noticed that Ubuntu has been getting slower and slower to boot, launch programs, etc. I installed 12.04 about 4 months ago,now 12.10, running on a quad-core Q8300 Intel, 4GB Ram, and an 80GB WD ...
0
votes
2answers
970 views

Lubuntu 12.04 on Acer laptop boots to blank blue screen

My previous question on this was closed, but I am posting it again as the solution which my son eventually found may assist other users of the forum, or someone may be able to tweak the solution to ...
0
votes
1answer
158 views

StartX fails, insufficient memory?

Some days back, I added a network printer at my institute. While trying to print for the first time, the computer asked for authentication, then complained of low disk space. I deleted a 3 GB movie ...
0
votes
1answer
539 views

How can I change the frequency of the RAM, and also know its value from Ubuntu?

I am using two modules of RAM and I would like to know their frequency because at simple sight, I can't see any sign of it in the modules. When I ran memtest one time, it showed me the test settings' ...
2
votes
0answers
269 views

Anything sync daemon for Ubuntu?

Is there a utility providing similar functionality to Anything sync daemon for 64bit Ubuntu? Preferably in the repository or with a PPA. In particular, I'd like to stop Firefox from constantly ...
2
votes
0answers
68 views

How to best check my hardware (mem and HD) for errors? [duplicate]

Possible Duplicate: How can I check my RAM and harddrive for errors? Lately, I have been experiencing problems using an Apple (macbook pro 3,1 2GB ram) with Natty installed. In three ...
7
votes
3answers
2k views

How do I tell what type of CPU cache is in my laptop?

Is there an application for Ubuntu that could tell me details about CPU, CPU cache memory, memory hierarchy, cache architecture implemented in my system, cpu cache size, cpu cache, access cycle and ...
6
votes
3answers
48k views

MicroSD card is set to Read-only state. How can I write data on it?

I have a MicroSD card reader in my notebook. When I insert a MicroSD memory card into it, I can't write any data on it - it's read-only. The same thing happens when I try to do it under root. And I ...
0
votes
1answer
143 views

System Memory Reporting

When logging into my Ubuntu Server 12.04 LTS (VPS), I get some nice stats upon login (or $ landscape-sysinfo): System information as of Tue Nov 6 05:41:06 EST 2012 System load: 0.0 ...
2
votes
1answer
323 views

Ubuntu 12.10 external RAM on old laptop?

Got this old Fujitsu-Siemens Amilo Pro V2010 on which I run now Ubuntu 12.10. Tried to open the back for adding extra RAM. Unfortunately, the back doesn't go off. So I now was curious if I could just ...
0
votes
1answer
338 views

Ubuntu 12.04 Not booting from USB

I recently made my USB bootable with Universal USB installer and changed the boot priority settings in bios..but when i restarts my pc my old xp loads. What can I do to boot the USB stick? My Pc ...
2
votes
2answers
5k views

Why is my /dev/loop0 showing full?

I have sufficent memory , but somehow I get my /dev/loop0 showing usage of 9 GB here's my df-h. Filesystem Size Used Avail Use% Mounted on /dev/loop0 12G 10G 1.4G 88% / udev ...
0
votes
2answers
629 views

All Memory Not showing up with Ubuntu-64 bit

I am only showing 5.8GB out of 9GB: harrison@harrison-Aurora:~/Desktop$ lshw -C memory WARNING: you should run this program as super-user. *-memory description: System memory ...
1
vote
2answers
773 views

Error -12 hibernation image. Not enough free memory (sometimes)

I am having a problem with hibernation in Ubuntu 12.10, it had worked fine in 12.04. When I try and hibernate it sometimes appears to hibernate throws up an error and returns me to the desktop. The ...
0
votes
3answers
626 views

Ubuntu 11.10 does not see all the memory

I have 11.10 64bit installed on my Lenovo s205. When I install 2G (confirmed by the BIOS), "Systems Info" only sees 1.6GiB, and when I install 3G, it only sees 2.6GiB. If seen some pages suggesting I ...
1
vote
1answer
201 views

Dump video data from RAM DISK to the HARD DISK?

This is the story: Some online video streaming sites like www.putlocker.com won't allow Adobe Flash Player to cache the streaming videos on your Hard Disk, so the users can't watch them offline. ...
1
vote
1answer
1k views

ubuntu 12.10.zram-config or zramswap-enabler?Which is better?

Which of this two are better for upstarting the zram?zram-config is available at software center.The other one is from ppa.