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 3.5GB 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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+200

How to Increase Ubuntu's Virtual Memory and/or Swap for Matlab?

Situation: Out of Memory errors in Ubuntu's Matlab Goal: allocate some Dram to virtual memory and/or Swap by using external HDD; the read/write decrease from 20 GBps to 0.1 GBps, which is ok! ...
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26 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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32 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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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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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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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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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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26 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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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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1answer
66 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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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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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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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 ...
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1answer
115 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
64 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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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
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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
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1answer
304 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, ...
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2answers
67 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 ...
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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 ...
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1answer
80 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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52 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 ...
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0answers
42 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 ...
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0answers
25 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 ...
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0answers
21 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 ...
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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 ...
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1answer
56 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 ...
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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 ...
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34 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 ...
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1answer
43 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 ...
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2answers
44 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.
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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 ...
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16 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
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42 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 ...
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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
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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 ...
0
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1answer
52 views

Is it possible to extend memory for ubuntu OS?

I installed Ubuntu 14.04 LTE in my DELL laptop.It is working properly,Now I can access 2 Operating systems(win8 & Ubuntu). At the time of installation process I allocated memory as around 10 GB ...
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0answers
31 views

How can I reserve memory for a specific application? (redis in this case)

I've installed Redis-Server on an Ubuntu Server 14.04 64 bit LTS and assigned 47GB of RAM as am expecting to temporarily hold data in RAM before dumping it eventually to Postgresql. I've noticed that ...
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1answer
77 views

kubuntu Xenial i386 and 8GB of RAM

I'm running kubuntu 16.04 i386 and have just installed additional RAM. It seems that 16.04 doesn't have pae kernel: E: Unable to locate package linux-generic-pae E: Unable to locate package linux-...
0
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1answer
49 views

How do you hotplug enable new CPU and RAM in a Virtual Machine

I am running Ubuntu in a virtual machine and I'd like to add CPU and RAM without rebooting the device. How can I hotplug this new virtual hardware?
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774 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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0answers
94 views

RAM Memory Not Recognized

Today I put a new 8GB RAM, replacing the old 4GB one, but it's not recognized by Ubuntu nor by Windows 10 (I have dual OS). Now I have only 4GB recognized because I didn't replaced both of them. I ...
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1answer
35 views

I've more than 60% of free RAM but i can't run a simple php file

I'm trying to run a simple .php file in my local environement : (Ubuntu 15.10 - Intel® Core™ i7-4600U CPU @ 2.10GHz × 4 - 64-bit - 8GB RAM) So you are seeing that I've more than 60% of free RAM ...
0
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2answers
67 views

not all RAM recognised ~3.3 of 8GB [closed]

I recently installed some new RAM so that I have 8GB (4x2GB sticks). The Bios displays all four sticks, however Ubuntu only shows about 3.3GB available. Both the system details and info from terminal ...
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1answer
47 views

Do I have 2 more free slots for RAM?

I ran sudo dmidecode --type memory and the result was: # dmidecode 3.0 Getting SMBIOS data from sysfs. SMBIOS 2.7 present. Handle 0x000C, DMI type 16, 23 bytes Physical Memory Array Location: ...