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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16.04LTS 64bit sees only 3.9GB of memory out of 8GB

free -m output: total used free shared buff/cache available Mem: 3951 1291 1720 41 939 2362 Swap: 4094 ...
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RAM Allocation to a Specific Program

I am attempting to run Minecraft on 4 GB of RAM. It is running at 4 fps, and is saying it only has 1 GB of RAM allocated to Minecraft, when it requires 2 GB. How would I go about allocating more RAM ...
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16.04LTS 64bit sees only 3.5GB of memory out of 8GB

I decided to move out of Windows 10 and I just finished with a clean install of Ubuntu 16.04LTS 64bit version - all updates to date . Problem is that it sees only 3.5GB of RAM. I checked the BIOS, ...
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6answers
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How to Increase Ubuntu's Virtual Memory and/or Swap for Matlab?

Situation: fix Out of Memory errors in Ubuntu's Matlab Goal: allocate some virtual memory and/or Swap on external HDD/SSD; the read/write decrease from 20 GBps to 0.1 GBps, which is ok! Therminology: ...
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6 views

How to fix different RAM issue 16.04 LTS for sleep mode?

Ubuntu 16.04 LTS laptop i5 e205, default 2GB 1066Mhz RAM. Now Additional hardware added of 8GB 1600 Mhz. laptop working fine, Issue when laptop go in sleep mode and resume laptop again it crash. ...
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3answers
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Do I need more swap space or more RAM… Please anyone suggest

I am using ubuntu 16.04. I am a kind of guy who always do programming, use chrome with nearly 10-15 tabs. A thunderbird mail client, Android Studio Etc... I am suffering with very high RAM usage ...
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16 views

Extending Memory on VirtualBox runnning Ubuntu 10.04 [on hold]

I'm having trouble extending VirtualBox's memory. I have created Ubuntu 10.04 in the machine and I need more space for my project. I have found and tried some of the solutions on the internet such as ...
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2k 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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1answer
44 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 ...
120
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8answers
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How can I monitor the memory usage?

I have used top to see the memory usage at the moment. But I would like to monitor the memory usage over a period of time. E.g start monitoring and then execute a few commands, and final stop the ...
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3answers
4k views

Is there a command that frees up RAM?

I was wondering if there is a command that frees up cached RAM I often have 1GB cached RAM when I only have 1.7GB of RAM, and when I start an application like Minecraft (uses a lot of RAM) and the ...
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2answers
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Memory limiting solutions for greedy applications that can crash OS?

I use my computer for scientific programming. It has a healthy 8GB of RAM and 12GB of swap space. Often, as my problems have gotten larger, I exceed all of the available RAM. Rather than crashing (...
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27 views

Ubuntu 16.04 Running Very Slowly on Acer Aspire E17

I am brand new to Linux and recently had a problem with Fedora24, trying to install NVIDIA drivers, the install failed and the OS became unbootable. I later installed Ubuntu, as I heard this is the ...
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1answer
33 views

ubuntu lagging, ram not getting used

I've just installed ubuntu 16.04LTS and my laptop is taking too much time to start I have HP laptop, Intel coreI3 processor 4gb ram NVIDIA graphics card, and while opening 2-3 applications, it is ...
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0answers
14 views

Unable to mount large .img file because of low RAM, but I've 4 GB?

Situation miui-tool@21966:~$ free total used free shared buffers cached Mem: 4194304 3774600 419704 17004 0 3754104 -/+ buffers/cache:...
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0answers
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Ram Information not making sense - Mem Usage = 6% , but free RAM = 375MB

System load: 0.0 Processes: 217 Usage of /: 0.5% of 425.74GB Users logged in: 1 Memory usage: 6% IP address for eth0: 192.168.1.1 Swap usage: ...
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3answers
364 views

Will Ubuntu work on this old machine?

I am trying to convert a old desktop into ubuntu (or Debian) machine. I have already looked up the supported hardware list but still have following questions. In order to provide details, here is all ...
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1answer
39 views

Determining the type of RAM

I'm trying to determine what type of RAM a computer has (whether it's DDR2 or DDR3). I've tried several commands: sudo lshw -short -C memory outputs this: H/W path Device Class ...
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1answer
26 views

Why is my Ubuntu being slow

I am seeing if I like Ubuntu on a virtual computer program. I can only give it 3 GB of ram. It was a bit slow when I used it. Will it speed up if I use 4 GB of ram.
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1answer
30 views

Compiz using excessive amounts of RAM?

So I've been running Ubuntu 16.04 on my new build, and I have 16gb of ram. What I've noticed in Htop is that for some reason over the course of a few hours compliz starts eating up ram before maxing ...
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0answers
46 views

Why my system is not showing me the updated amount of RAM?

Before my laptop was running with 2GB RAM; I've installed new 2GB RAM. But system is still showing RAM an amount of 2GB instead of 4GB.
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4answers
437 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 ...
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1answer
28 views

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

EDIT: I just increased memory allocation to 2 GB and viewed system monitor while running the script, turns out that memory usage is spiking from 500 MB to 1.6 GB just from loading a 200 MB file, so it ...
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1answer
41 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 ...
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27 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 ...
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0answers
19 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 ...
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803 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 ...
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1answer
68 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 ...
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0answers
29 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 ...
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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 ...
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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....
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2answers
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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 ...
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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 ...
164
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19answers
144k 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 ...
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3answers
480 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
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1answer
121 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 ...
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1answer
67 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 ...
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0answers
75 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
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2answers
68 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
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0answers
205 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 ...
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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
42 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
321 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
119 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
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0answers
35 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
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1answer
84 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 ...
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6answers
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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 ...
27
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4answers
15k 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
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1answer
583 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?
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2answers
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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 ...