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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1answer
15 views

upgraded to 6gb of ram only 3.5 showing

k so i had 4gb of ram only 3.5 was usable i upgraded to 6 and only 3.5 are still usuable ive installed the pae kernal after i restarted it amde me reinstall it and it yet didnt recognize the ram ...
0
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0answers
9 views

Crazy search glitch

Whenever I go to search (in 14.04 LTE) my PC flips out and I have to reboot, I suspect it has something to do with how it has only 512MB of RAM, but it has the 32 bit... It has the following gear: ...
9
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1answer
9k views

zram vs zswap vs zcache Ultimate guide: when to use which one

What the hell are they? how are they different (I've written my understanding in an answer below) In the Zswap system, when a page is evicted from the zswap to the actual swap is it stored in a ...
-2
votes
0answers
21 views

Disk buffer causes applications to swap out? [on hold]

I have an OVH Classic VPS 1 with Ubuntu 15.10 running on it. Whenever I use a program that reads a lot of different files, (e.g. tripwire), I see through htop that my disk buffer grows drastically and ...
4
votes
3answers
895 views

Installed 11.10, but it's not detecting all 8GB of RAM, only 3.9GB. BIOS sees 8GB

Just installed 11.10, but it's not detecting all 8GB of RAM. System Info says there are 3.9GB. Bios doesn't have a problem recognizing all 8. free -m results in: total used ...
14
votes
4answers
9k 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 ...
0
votes
1answer
29 views

Intel X4500 + 8GB RAM = no more MTRRs available and X freeze

I have a considerably strange issue with Ubuntu 14.04 LTS. I have two Lenovo T400 machines - both running the .24 BIOS - with integrated Intel graphics and two sets of 2x4GB RAM modules of different ...
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votes
2answers
30 views

I increase my ubutu performance withough swap partition? [duplicate]

I ever install Uuntu withough swap partition or file, is that ok?, or i must create one? How can i see if i need it
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2answers
52 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 at wiki.ubuntu.com/HardwareSupportMachinesDesktopsDell but still have ...
0
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0answers
41 views

ubuntu 14.04 freezes frequently

I have gone through many Q&A regarding "Ubuntu freezes frequently" and I didn't find any suitable answer for my problem, Thats why I am asking the same Question with all information which I can ...
8
votes
7answers
2k views

Would adding more RAM increase my speed in Ubuntu, and how hard is this to do?

I've got a Compaq 6910p 14 inch laptop with 1GB RAM, 2.0ghz Core2Duo and a Mobility Radeon x2300. I was wondering if Adding more RAM would help my computer If I add RAM, will I have to reinstall ...
6
votes
2answers
2k views

tmpfs vs. ext4 ramdisk

I would like to know which of both is faster; a tmpfs or a ext4 ramdisk. If someone knows a good way to benchmark disk perfomance on ubuntu, I will gladly do the test myself and post the results.
2
votes
1answer
18 views

“Inactive memory” management on Linux

One of the problems that i face to many times a week on Linux is the inactive memory management. Whenever i copy a a huge file or open a program like Matlab on my Ubuntu i notice that there is a huge ...
6
votes
2answers
4k views

Why is the evolution-calendar-factory process running?

Why is the evolution-calendar-factory process running? Here are some of the running processes (created with ps aux --forest) lightdm \_ /usr/bin/X -core :0 -auth /var/run/lightdm/root/:0 -nolisten ...
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votes
0answers
51 views

Ubuntu 14.04 strange total freezes

I'm getting very strange freezes on Ubuntu 14.04 on my Lenovo Y40-70. I do not believe it is the old problem with the Nvidia card because I have an AMD graphics card. The first time it happened was ...
0
votes
1answer
19 views

How to configure Ubuntu to utilize more available RAM

I have an Ubuntu laptop with 16GB of physical RAM. However most of the time only 4.5GB are utilized. Are there any configurations I can make to allow or encourage the system to consume more RAM seeing ...
12
votes
4answers
47k views

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 ...
1
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1answer
29 views

Ubuntu Live CD/USB - Available Space

I recently used a Live CD to resolve a file access issue on a .7z archive. I am a new Linux user and initially concluded that I could not install p7-Zip (or other software) in a live session. I later ...
0
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1answer
29 views

Ubuntu system Does not see ram

I am running ubuntu 14.04 and just installed 2GB of ram in addition to the 4GB I already have. However when I look under about computer it show me only having 2.7 . when I run "sudo lshw -class ...
0
votes
1answer
38 views

Why doesn't my machine tell me it's memory type?

I wanted to see my memory type information (ex: DDR2, DDR3, DDR4) with the commands below, but it doesn't say. What's the reason? Is there a way I can know? $ sudo lshw -short -C memory ...
0
votes
1answer
28 views

Boot stuck at IRQ 22

I'm running Ubuntu 14 on a Macbook any my system froze so I performed a hard reboot. However when it came back up, it shows me the grub menu but no matter which kernel I pick the boot freezes with the ...
0
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0answers
21 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.
0
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1answer
28 views

Help me to interpret my memtest+ result and guide me what to do next

I have previously installed and enjoyed Ubuntu and had both 12.04 and 14.04 but I uninstall both of them and installed 14.04 LTS and it was a disaster for me. Could open my PC anymore due to many ...
1
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2answers
67 views

Increase processor utilisation of one application/program

I use ClustalX to align few unusually big sequences on my home desktop, this takes more than a week to complete and runs well below the maximum capacity of the machine. The top | grep clustalx gives ...
0
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3answers
724 views

Why does 15.04 freeze?

The issues are listed in this link, but I'll relist/summarize here: Ubuntu 15.04 is locking up on me, primarily when watching internet videos or listening to Slacker Radio. I have Ubuntu installed on ...
1
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1answer
29 views

Can I freeze an application to run it at a later time?

Though it might seem silly, I want to freeze an application that I can not save my progress in (specifically games where I have to play a full level, and time is short sometimes but I still would love ...
1
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3answers
60 views

Speeding up ubuntu machine [closed]

Does below command improved performance of the machine: sudo sync && echo 3 | sudo tee /proc/sys/vm/drop_caches I know this is for freeing RAM. Please guide
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1answer
53 views

ram usage is too high after update of fglrx driver

yesterday when i update my computer it asked new version of fglrx driver available to use? so i choose new version. after i notified my ram usage is too high so my computer is too slow and stuck for a ...
1
vote
1answer
23 views

why does free command show more memory usage than other tools [duplicate]

When I use free -h -l command I see 1.8G in use where system monitor app shows me 1.1G in use. total used free shared buffers cached Mem: 1.8G 1.7G ...
2
votes
2answers
255 views

Ubuntu won't boot with over 4gb ram

When booting Ubuntu 14.04 server LTS with more than 4gb Ram the computer displays a black screen. I have an Asrock D1800B-ITX motherboard. The processor is an Intel Celeron J1800 (64 bit processor) it ...
0
votes
0answers
34 views

Too much hard drive operations, memory management problem, probably

This may be a vague question but I hope to get your feedback. If I am correct that when memory is full, OS starts paging or swapping to use parts of the hard drive. My hard drive is always operating ...
0
votes
1answer
52 views

How much RAM I can upgrade my netbook? [closed]

I have a old netbook acer aspire one ZG5 which has 512MB DDR2 fixed on the mother board and one slot for second device of RAM which I suppose the max amount of ram added is 1GB! Can I upgrade this ...
0
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1answer
33 views

0 byte memory left after update

since a few weeks, I faced the same problem several times. All of a sudden, I get a system message like "0 bytes memory left on hard drive". Naturally, programs stop working normally and I can't save ...
0
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0answers
57 views

Running Heroes of the Storm on Wine

I installed heroes of the storm and changed it to the 32-bit client (like it says to do on wineHQ), but everytime I run it, the screen becomes completely red, and if I do anything it crashes and says ...
0
votes
0answers
52 views

Ubuntu 15.04 does not recognize all my ram

I am running Ubuntu 15.04 and in the system monitor it tells me I have 7.8 GB of ram, but I have 16GB installed. My graphics card only uses 2GB, so where is the rest? MemTotal: 8157900 kB ...
0
votes
0answers
81 views

How to install Ubuntu on mac via usb drive without erasing anything on the mac

I want to install Ubuntu 15.04 on my mom's iMac. I'm new to these things and I don't want to erase anything on her computer, as she has many files and pictures. I installed the "preview" I guess i ...
1
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0answers
48 views

Can I Install RAM Wipe Feature at shutdown/reboot of Backbox in Ubuntu 14.04

We decided to use Ubuntu 14.04 in Full Disk Encryption along with the Nuke crypt setup patch released for Kali-Linux as an extra layer of security but I would like to know that is it possible to ...
1
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0answers
38 views

Extremely slow OS. Swap related?

I really hope you can help me. An inexperienced sysadmin, installed Ubuntu on a new Dell Desktop, it's a pretty powerful machine, and I ran a bunch of hardware tests, and can confirm that RAM/HDD and ...
1
vote
2answers
50 views

What do these numbers mean in syslog?

I'm trying to determine why MySQL server process is being killed due to out of memory, so am looking at the sylog. Immediately before the 'out of memory' I see lots of lines with differing numbers but ...
1
vote
1answer
44 views

Record RAM usage during runtime of a Java Application

I want to evaluate how some code transformations change the RAM usage of a Java Application. Is there a possibility to log the average RAM usage or the highest peak of the RAM usage in the shell ...
0
votes
0answers
21 views

after system update 4GB RAM decreased to 2.5GB (Ubuntu 14.04 x64)

after update ubuntu about a month ago, the amount of available memory dropped to 2.5 GB. Bios sees normal 4GB, before upgrade Ubuntu also saw 4GB the same problem: 4GB RAM installed, Ubuntu shows ...
0
votes
0answers
19 views

VRAM usage from DE

I'm using NVIDIA GT 705 /1gbDD3.64bit.48CudaCores/, Ubuntu 14.04 with Gnome 3. While playing Heroes of the Storm VRAM usage is going up to 945 so here is the question: Will it makes difference if i ...
1
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1answer
53 views

Ubuntu 14.04.1 is consuming 7.8 gigs of 8 gigs ram?

Actually had to create a new account due to openid 2.0 obsolete....I havent been on Askubuntu in quite awhile but tonight I was doing some work on a website when noticing my computer for once was ...
1
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1answer
36 views

How to specify the memory size in ubuntu in GB?

I am trying to know what is the memory size in GB in a Ubuntu server. What do these values mean? >> free -to total used free shared buffers cached Mem: ...
0
votes
1answer
73 views

Maximum RAM for my Ubuntu and laptop? [duplicate]

My laptop is Thinkpad T400, and running 64 bit Ubuntu 14.04. I wonder if there is no limit of the RAM size that I can use in my laptop? Now I am running Windows 8.1 in VirtualBox, which takes 2GB ...
0
votes
0answers
24 views

Prevent page cache above certain RAM usage level

Someone here on AskUbuntu pointed out that disk caching is harmless thing, that only makes your disc read times faster. And that it is birds singing and flowers only. I kinda have to disagree: I ...
0
votes
2answers
40 views

conky RAM usage - does not show large file in ram disk (tmpfs)

My conkyrc file contains the following: ${color grey}RAM Usage:$color $mem/ $memmax - $memperc% ${membar 4} This shows RAM usage numerical values and a bar, for example "1.01GiB/ 7.79GiB - 13% ...
0
votes
2answers
613 views

Huge loss of memory from USB boot. Any help? [duplicate]

I have successfully installed Ubuntu 13 on my laptop using an 4Gb USB drive with a bootable .ISO However I went to try and format the USB on my desktop(Windows 7 :( ) and now it only has 700Mb Is ...
0
votes
0answers
76 views

How to find swap usage per process when conventional methods fail? (15.04)

I'm having some difficulty determining what is using my swap space on Ubuntu 15.04. Even though I've set vm.swappiness to 1 and have more than 1/2 of my 16GB of RAM free (or at least unoccupied by a ...
0
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0answers
71 views

vmware workstation on ubuntu 14.04 do not use ram and swap don disk

i have a strange problem, just get new notebook, moved disk from old notebook. new pc have intel i7 with 8gb ram, ubuntu 14.04 64 bit on board (previous was 3gb ram). i'm using vmware workstation ...