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)

1
vote
0answers
10 views

Ubuntu refuses to store a 200 Mb file in memory cache but there's plenty of room

I'm using Ubuntu 14.04 in Virtual Box and it's allocated 1.5 GB memory and 20 GB hard drive. When I load a file of ~75 MB using a python script the computer is reading from hard drive the first time ...
0
votes
1answer
19 views

How to check memory type and speed? [duplicate]

I want to get more RAM for my computer, and I understand that to get the right type of RAM I have to know the memory type and speed (minimum and maximum as far as I understand). So how do I find these ...
1
vote
0answers
16 views

how to enable dedpulication in linux

I want to enable deduplication in Linux. I am not sure whether it is enable in Linux and XEN hypervisor by default or not. If not enable by default then how to enable deduplication in Linux and XEN ...
0
votes
0answers
16 views

RAM used by processes does not add up to the total RAM using top command

The total RAM used is about 5GB but I am not running just a few processes as shown in the the picture. I try to find which process is eating most of the RAM, but the result is from top command is not ...
0
votes
0answers
555 views

High usage of ram in Ubuntu 16.04

I have a problem since I upgraded from 15.10 to 16.04 some days ago: My ram is almost completely full! I have 8 GB of ram on my system, currently 6,9GB are used (with just firefox open). I've ran a ...
5
votes
1answer
58 views

Who eats all my file descriptors and thus memory?

my current system: 14.04.4 LTS (GNU/Linux 3.13.0-85-generic x86_64) $ free total used free shared buffers cached Mem: 16366288 16090588 275700 ...
0
votes
0answers
22 views

Installed memory in Windows 7 guest machine in VirtualBox

My virtualbox guest machine (windows 7) is setted to have 6GB allocated memory, it is the half that my host machine has(Host machine is xubuntu with 12GB of RAM), my question is: after running windows ...
7
votes
2answers
1k views

How do I check ram latency?

I need to buy new RAM . First I need to know speed >> done Second I need to know latency >> how ? All I tried from google. dmidecode --type memory dmidecode 2.11 dd if=/dev/zero of=/dev/sda2 ...
1
vote
0answers
30 views

What are these memory strings? What do they do? [migrated]

Recently, I dumped my memory strings (just because I could) using sudo cat /dev/mem | strings. Upon reviewing this dump, I noticed some very interesting things: .symtab .strtab .shstrtab .note.gnu....
7
votes
2answers
7k views

Automatically kill a process if it exceeds a given amount of RAM

I work on large-scale datasets. When testing new software, a script will sometimes sneak up on me, quickly grab all available RAM, and render my desktop unusable. I'd like a way to set a RAM limit ...
0
votes
0answers
15 views

Ubuntu 14.04 Nagios high memory load [duplicate]

I'm quite new to this, I've installed 14.04 server to run Nagios with 60 hosts with approximately 20 service checks for now. When I check my server load with htop and top, they show that my server ...
162
votes
19answers
140k views

I have 16GB RAM. Do I need 32GB swap?

I read many places that the rule of thumb for swap space is to double the amount of physical RAM. However, 32 GB does seem a LOT. Do I need that much? Do I need it at all with this high amount of ...
2
votes
3answers
454 views

Why does the system report 7.7Gb of total Ram when I installed 8Gb?

Why does the system report 7.7Gb of total Ram when I installed 8Gb? I'm using 14.04 on a Dell Vostro 2011
2
votes
1answer
57 views

Invisible processes using all of system memory

I have a VPS (Ubuntu 14.04) with 512MB of RAM. This used to be quite enough, but for a while, this has been causing problems -- something is eating up all of that memory, and my debugging has left me ...
1
vote
1answer
43 views

How to use available RAM? [closed]

My computer running Ubuntu 16.04 has 32GB RAM, but even on heavy tasks, rarely over 8GB is consumed. I wonder if is possible to tell Ubuntu to use more RAM to speed up the process. Moreover, after a ...
0
votes
0answers
65 views

System freezing after upgrading to 32 GB RAM (update)

I have recently upgraded my Toshiba Tecra W50-A-114 from 16 to 32 GB RAM (added 2x 8 GB modules of Kingston KTT-S3CL/8G that is certified to use with my laptop). I did clean installation of 64 bit ...
1
vote
2answers
57 views

Can you empty cached items from memory without needing to close Firefox?

I currently have Firefox set up so that a persistent cache is not stored after closing Firefox. I only have the memory cache enabled which it empties when Firefox is closed. Sometimes I need for ...
0
votes
0answers
196 views

How to update RAM amount, after changing in BIOS?

In my Lenovo x1 carbon 2015 UEFI/BIOS I can choose between 256 and 512 MB GPU ram. If I choose 512, it will take 256 MB from the normal ram, giving me only 7,7 GB left. After changing this back to ...
0
votes
0answers
18 views

Compiz takes much RAM for transparency perk alt+scroll

How can I make my windows transparent by doing Alt+Mouse Scroll? This will take 200mb for something as simple as running CSS command, unacceptable. Am i doing it wrong, with compiz having to be shut ...
2
votes
1answer
38 views

How to write efficient script to have memory (RAM) peak?

I have a network with some PCs. I wanted to have peak of the memory for each system. I wrote a script to check the used memory and writes the peak in a file in /tmp; and I've set the script to run ...
5
votes
1answer
190 views

System Monitor doesn't accurately show memory usage

I came to Ubuntu 16.04 from Mint 17.3 ( and Ubuntu Mate 15.10) , and I'm shocked with the memory usage of Ubuntu 16.04. With a clean install, 16.04 used about 650+ Mb RAM, and after 1 or 2 days, ...
0
votes
1answer
113 views

Kswapd0 using 100% of CPU

I've got a mini server running (L)ubuntu 14.04.3, kernel 3.4.39. Every once in a while, the process kswapd0 will use 100% of my CPU power, even though I only use about ~20% of my RAM at that time. ...
0
votes
0answers
32 views

Increasing available RAM temporarily on Raspberry Pi 2

I recently tried to compile Github's Atom on my Raspberry Pi 2, but after getting past the first error and trying again, it aborted in the middle of the build. Looking in the log showed that it ...
0
votes
1answer
58 views

Lots of ram uses in Ubuntu 16.04

After latest update of Ubuntu I found out that it's using lots of RAM. I have 8 GB of ram and from last week Ubuntu is using all of it. I also use Android studio and after 2 hours, my system ram is ...
9
votes
6answers
115k 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 ...
26
votes
4answers
14k views

Computer freezing on almost full RAM, possibly disk cache problem

The problem I think is somewhat similar to this thread. It doesn't matter if I have swap enabled or disabled, whenever the real used RAM amount starts going close to maximum and there is almost no ...
11
votes
1answer
567 views

Ubuntu settings after adding additional RAM

My system has 3.8 GB of ram. My system allows 8 GB of ram. If I insert another memory chip of 4 GB, do I have to make any other changes in OS setting etc?
6
votes
2answers
2k views

Unsure if my RAM speed is set correctly

edit: Thank you for reopening I have an an AMD APU as my CPU/GPU (specs below) and its graphical performance benefits greatly from higher speed RAM. In my motherboard BIOS I have set the memory clock ...
0
votes
0answers
44 views

Ubuntu 16.04 in virtual machine has no memory although just set up

I recently installed Ubuntu 16.04 lts (64 bit) on a virtual machine. My host OS is Windows 10 on an Acer Aspire laptop with plenty of memory. The virtual machine says the base memory is 2458 MB. I ...
1
vote
1answer
2k 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. ...
-1
votes
0answers
22 views

Loading Unix Sockets on RAM to allow faster Communication

I am currently working with some php versions and nginx. They are communicating with FastCGI and i liked more the idea to let them communicate via an Unix Socket.. There i just got some Perfomance ...
0
votes
0answers
16 views

Swap priority gets set to -1 on each boot

I have a swap partition of size 7.9 GB. When I use the command free, it shows this: NAME TYPE SIZE USED PRIO /dev/sda7 partition 7.9G 0B -1 The swap partition is not being used and ...
0
votes
0answers
31 views

Ubuntu 16.04 freezing when running multiple programs or games

I am currently experiencing freezes on my recently built PC. The freezes are are accompanied by an audioloop and occur either when in a game or when running several programs at once. I tried using ...
0
votes
0answers
20 views

Ubuntu 14.04 Clear Swap when RAM is full

I am running a python program that, for some reason, goes crazy once in a while. I am then forced to kill the program but the RAM and Swap used by the program is not released. This causes the hanging ...
0
votes
0answers
14 views

14.04 Multiple Crashes, Different Circumstances, How to fix?

I am running 14.04 on Hard Drive not Virtual (just for clarification). Sometimes I am doing something, anything, maybe browsing the internet or typing something, and then it gets frozen. I have to ...
3
votes
3answers
412 views

lshw not showing individual memory bank info

This is all I get: sudo lshw -C memory *-memory description: System memory physical id: 0 size: 7981MiB sudo lshw doesn't give any more info. lshw used to ...
1
vote
1answer
51 views

Ubuntu doesn't recognize full RAM capacity

I have installed a Ubuntu Server 16.04 amd64 on my machine. I'm having trouble with ram capacity - first I installed a 2GB stick which free -m reported as 1430 total size, now I installed a different ...
0
votes
1answer
18 views

Server is swapping regardless of available memory

Here is some vmstat output x@x-server:~$ vmstat 1 procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu----- r b swpd free buff cache si so bi bo in cs us ...
0
votes
0answers
27 views

Java based application is really slow

I am using Ubuntu 16.04. I have a big problem with java based application. When I use java based application, the application always become really slow. The application I used are Cytoscape and ...
1
vote
1answer
34 views

Swiching to Lubuntu from Ubuntu- Guild Wars 2

If I install Lubuntu over, or in replacement of, the Ubuntu I am already using, can I still download Guild Wars 2 with the play on Linux app? I currently have the game downloaded but it crashes at the ...
0
votes
2answers
2k 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
2answers
40 views

How to show size Ram and CPU ussage in Ubuntu?

I am newbie in use Ubuntu so I don't know how to show Ram and CPU usage which is the same in Task Manager on Windows. It can show by command line in Ubuntu or Application to see more.
0
votes
4answers
4k views

Is there any application or command that cleans the memory like CCleaner in Windows?

After the system has been running for 8 hours continuously, it becomes slow. When I faced the same situation on Windows, I used CCleaner to clean memory, which used to give me a little boost. Is ...
6
votes
1answer
14k views

how to get graphics card memory info? windows and linux shows different value

In my Windows 8, video card shows 640 MB of available memory (Screen Resolution > Advanced Settings or with dxdiag). But ubuntu (with lspci command) shows 256 MB. so who's right?
1
vote
0answers
16 views

How to restrict OS using specific memory locations in RAM?

I have 6 GB of RAM, my RAM has a block of memory corrupt( 1MB of size). When I tested it with memtest, it showed about a hundred thousand of errors in just a small part of it, starting from 5024.1 MB ...
0
votes
0answers
15 views

GPU vram extended with system ram

Is it possible to virtually increase the usable GPU memory RAM through the system RAM or an SSD? Background of the question is a program that requires a bigger than available GPU RAM.
0
votes
0answers
39 views

Store data on RAM to save loading time

I have large amount of data (about 3 Gb) which needs to be interpreted by Python. Because I don't have any SSD, but large (~50 Gb) amount of RAM, I tried to save data on /dev/shm or tmpfs, but it ...
0
votes
0answers
29 views

Ubuntu giving a blank screen after restore from suspend after a RAM upgrade on 16.04

I've increased the swap partition to be about 2x the new amount of RAM after the upgrade to resolve the issue, but that doesn't seem to have fixed it. The computer could previously suspend and ...
0
votes
1answer
30 views

Not properly using Physical memory

How do I get ubuntu to make use of the swap file. It doesn't even use the full physical memory, it only uses 1.3 Gb of 8 Gb, and it doesn't make use of the swap file at all, even when it has detected ...
1
vote
4answers
4k views

installing ubuntu first time, DELL Optiplex 755

I am new to computers and everything and want to try ubuntu on a desktop I just got, DEll Optiplex 755. It is a bit old, I think 2007. Will the new version of Ubuntu work on it. I am upgrading the ...