Tagged Questions

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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4
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2answers
67 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 ...
0
votes
0answers
53 views

RAM usage in Chrome

I run quite a few windows and tabs open is Chrome on a regular basis and while on Ubuntu it seems to seriously bog my system down. 4gb ram and 4gb swap. This laptop is dual booted with Windows 8.1 ...
13
votes
1answer
859 views

How to tell what kind of RAM is used?

I recently added another RAM module and while it is supported by my motherboard I'm not quite sure if it's of the same type as the one my notebook shipped with. How can I tell what RAM modules are ...
0
votes
0answers
28 views

Ram not recognized

I have an HP 255G1 laptop with Linux preinstalled. It came with 2 gb ram and as of late I installed another (HP certified) memory module, and now I should have 4 gb ram BIOS sees it, memory test ...
0
votes
0answers
38 views

GIMP memory increasing problem

I have a problem with GIMP in Ubuntu 14.04. When starting GIMP it works perfectly at first, but as soon as I copy a selection of pixels value in "system monitoring > resources > memory and swap ...
0
votes
0answers
75 views

Simple logging of ram usage on 14.04

I'm looking for a very simple logging program that will log ram usage over say 18 hours. I don't mind if it logs every minute or just records the peak usage. I don't need it to record any extra ...
0
votes
0answers
17 views

How to set up a ram-disk [duplicate]

I need a RAM-DISK to move data between two applications and have been using Google to learn about it. I have found articles that talk about tempfs and /dev/shm. Apparently /dev/shm points to ...
3
votes
1answer
159 views

How to set a memory limit for a specific process?

I tried to execute mpiexec -16 ... on a 384 GB RAM server, but it induced OOM Killer and was aborted. How can I set a memory limit for mpiexec execution? I know ulimit, but it might affect other ...
1
vote
1answer
335 views

What is recommended size or ram for ubuntu 64bit virtualbox host?

I want to use ubuntu 14.04 64bit as a host to run virtual box. Some places say that the minimum ram requirement for ubuntu is 512mb where as on the downloads section it says that 64bit is only for ...
0
votes
0answers
48 views

Why does ubuntu not seem to release memory?

I am working with apache2+php and other web server apps. I have monitor as session connecting to a web server. RAM memory is full. But when disconnecting a session, it does not free the RAM memory. ...
0
votes
1answer
114 views

32-bit PAE - Only 2 GB of ram recognized, 4 GB installed

Ok, there are a lot of this question and still I don't have an answer, so maybe I give it a shot asking the question. I recently bought a 2 Gb RAM and put it into another DIMM slot. So now I have 4 ...
0
votes
2answers
83 views

Can't find where memory is being used

I'm still a novice with Ubuntu, and have converted an old Toshiba L655D to use the OS. I have 3gb of memory installed, and this appears on on the GRUB memtest. But within Ubuntu, looking at free -m ...
0
votes
1answer
29 views

Use/See whole the flash memory space [closed]

When we bought a N Giga Byte flash memory, the free space that the OS provide for us, is less than N GigaBytes. For example, for a 2 GB flash memory, total space that we can use, is 1.86 GB. As far ...
1
vote
0answers
75 views

huge cached memory, mostly freez system :(

I have a problem with system memory cache, i think it is bigger than normals. after 5-10 minute of usage, system become unusable and i must restart my "Asus X451-CA" laptop. this command ran upon user ...
0
votes
1answer
81 views

Random reboots/shutdowns after RAM upgrade

I'm running Lubuntu 14.04 on an old Dell Dimension 8200. After installing two 512 MB RAM chips (essentially increasing the RAM form .25 GB to 1.25), the system randomly shuts down or reboots. Is ...
1
vote
0answers
26 views

Why does it state that *-cache:1 DISABLED at lshw command

It seems like my memory is working correctly but I am puzzled by the output of the following command. Is the memory disabled and how do I go about testing it if it may be. $ sudo lshw -C memory ...
1
vote
1answer
558 views

/dev/sda1 /boot is full [duplicate]

I know there are a lot of questions like this but I've tried pretty much to understand what to do and failed. By df -h I know that my /dev/sda1 /boot is with 100% use. I'm not understanding what I ...
0
votes
2answers
40 views

Ubuntu 13.10 (32bit) on acer aspire one

Has anyone ever tried Ubuntu (32bit) on an acer aspire one d255 2dqkk with 1GB of Ram or 2GB? At the moment I have 1GB installed and I would like to add 1GB more.
0
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0answers
141 views

How much Memory/RAM is really being used by this Ubuntu 14.04 system

How much RAM/memory is really being used by the Ubuntu 14.04 x64 system? From htop, the amount of memory used is 3 GB and swap usage (on SSD) is 5.7 GB. However it appears that the most memory hungry ...
1
vote
1answer
396 views

How much RAM will 14.04 need? [duplicate]

How much RAM would Ubuntu 14.04 need? (Usage: A bit of pictureprocessing, maybe an IP-Camera Stream, ordinary officework, simplecv, some Torrentdownloading). Is 4GB or 8GB better suited for me?
1
vote
1answer
192 views

Why can MySQL not use /run/shm as tmpdir?

I read that using RAM for MySQL's temporary tables should improve performance. I tried to create /etc/mysql/conf.d/local.cnf with the contents: [mysqld] tmpdir = /run/shm But restarting mysql ...
0
votes
2answers
221 views

How to check the speed of ram when dmidecode command is not working

Output of the dmidecode command is like this. viki@viki-pc:~$ sudo dmidecode --type 17 # dmidecode 2.12 SMBIOS 2.7 present. Handle 0x0006, DMI type 17, 21 bytes Memory Device Array Handle: ...
1
vote
2answers
102 views

CGroups memory subsystem

I want to know if I can set dynamic limits to the memory subsystem in a cgroup. Currently I have the OOM disabled and a dummy process to test the control group, when the limit in memory is reached, ...
0
votes
1answer
66 views

Which 14.04 version should I install? [duplicate]

My specific question is that I have 3.9GB of ram, but I don't have an AMD processor. I have the Intel i5. Do I install i386, or the AMD x64 version of 14.04? Let me know if there are other specifics I ...
0
votes
2answers
89 views

Installed more ram /boot/efi not found… How to fix?

So, I just installed more RAM. Now I can't boot (properly) into xubuntu. When booting I'm greeted with something along the lines of "Failed to load /boot/efi, press S to continue or press M to ...
1
vote
1answer
28 views

free displays incorrect memory on Nexus 10

I'm playing about with Ubuntu Touch on a Nexus 10 (which should have 2GB RAM). phablet@ubuntu-phablet:~$ free -h total used free shared buffers cached Mem: ...
0
votes
1answer
63 views

Lots of Memory and CPU being used on nothing

I noticed over the last week or so my computer is using a lot of CPU and Memory when nothing is obviously running (even after rebooting). With only my browser open it's using 20% CPU, 4.0 GB Memory ...
0
votes
1answer
45 views

bad ram in DIMM1 need to limp by till monday, can I temporarily disable a memory slot?

Got to work, started windows, immediately blue screened as soon as I logged in. After a few tries I ran diagnostics and found the ram in dimm1 was bad. I can boot into Ubuntu and it runs pretty well ...
0
votes
2answers
62 views

Am I using more than 4 GB on my 32-bit system?

I have a relatively clean installation of Ubuntu which reads this under system details: I've read everywhere that 32-bit OSs don't support more than 4 GB of RAM (some sources say 3 GB), so what's ...
0
votes
0answers
235 views

VMware Player RAM memory problem

I've installed windows 7 on ubuntu using vmware player. I have a 6 GB ram memory, so the amount of memory I've allocated for this virtual machine is 2520 MB. But when I look in the "system monitor" on ...
0
votes
0answers
65 views

ubuntu 14.04 works full load

I have X61 lenovo - cpu T7200 dual core and 4 gig memory ! I installed ubuntu 14.04 and did all updates and deactivate all animations and the full search. however, still just opening four tabs on ...
0
votes
1answer
88 views

Random Crashes Ubuntu 12.04

Every once in a while my Mem and CPU max out. In looking at the syslog I found Jun 25 01:45:30 id-llc-projects CRON[29889]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1) ...
0
votes
1answer
367 views

Ubuntu 14.04 - 32 bit vs 64 bit

If I install Ubuntu 14.04 32 bit version on a machine with RAM exceeding 4 GB, will it not use more than 4 gb of ram ?
0
votes
2answers
286 views

can't suspend to RAM any more after upgrade to 14.04

I upgraded to 14.04 and now my laptop can't "sleep" anymore i.e. suspend to RAM doesn't work. How can I figure out what's wrong and fix this? edit 1 My hardware is a ASUS Zenbook UX32A edit 2 ...
0
votes
1answer
62 views

responsiveness drops drastically when RAM get's full after upgrading from 13.04

Since I've upgraded from ubuntu 13.04 to 14.04 (and before 13.10) my system get's to it's knees when the memory get's full and has to start swaping.. Of course I know that a performance penalty ...
2
votes
3answers
933 views

Why does my system use so much cache?

Previously, on my desktop computer running Ubuntu 14.04, I had 4GB RAM, which I thought should be plenty. However, after being on for a while, my computer would seem to get slow. I have a system ...
0
votes
0answers
90 views

XFCE is consuming much RAM

I am using Ubuntu 12.04 LTS and have 9GB RAM. So I had Unity desktop environment, and then I installed xfce4 and xfce4-goodies: sudo apt-get install xfce4 xfce-goodies Then I removed Unity using: ...
0
votes
1answer
254 views

14.04 64 bit memory use

When I start the OS I have half of the memory used (1Gb) and now with chromium open this is the output of free: piero@piero-Vostro-400:~$ free total used free shared ...
3
votes
2answers
55 views

Can I save a file from RAM?

To be more specific, here's the situation. I was working on MyPaint from a blank document and, after a few hours during which I didn't save anything (of course…) the program freezed. I didn't close ...
0
votes
1answer
35 views

Are all pages of a process loaded in swap file / partition?

"Swap space is the area on a hard disk which is part of the Virtual Memory of your machine, which is a combination of accessible physical memory (RAM) and the swap space" . According to a user now , ...
0
votes
2answers
18 views

In Consistent RAM reports

"System Monitor" tells me i am using 1.3GB of 2.9GB at 42.8% "atop" tells me i am have 174.8M Free "top" tells me i have 3072772 total, 2894424 used, 178348 free 3072772KB = 2.93042373657227GB ...
3
votes
1answer
2k 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 ...
6
votes
2answers
116 views

How much RAM is this application using?

If I run top -c or htop I get processes with their memory consumption, but it is not what I want to see. Is there a command line that allows to see the RAM consumption of a given application ? For ...
0
votes
1answer
213 views

What is wrong with the memory usage?

I can't figure out what is consuming my memory... Could anyone help me? user@desktop:~$ free total used free shared buffers cached Mem: 8176992 6186776 ...
0
votes
1answer
89 views

Why is the minimum video memory for a virtualbox machine so large?

I'm creating many virtualbox systems with clean installs and such and noticed that the default video memory size is quite large. I could understand at the beginning of the Ubuntu installation a VGA ...
1
vote
3answers
192 views

Ubuntu Frozen every time when Memory usage over 80%

Ubuntu Frozen every time when Memory usage over 80%, It seems that the system hangs due to a load of disk IO - the screen is frozen and the only thing I can see is the indicator LED of disk keeping ...
1
vote
1answer
122 views

Know programs in cache

I have this situation with RAM and SWAP at the moment: $ free -h total used free shared buffers cached Mem: 7,7G 7,5G 159M 100M ...
2
votes
1answer
58 views

Lagging when swapping

I use Ubuntu 14.04 on my Lenovo E531 with 4GB installed. The problem is that when the RAM is about 70% full the system starts swapping. After swap is used (even if only 10MB is in swap) the system ...
4
votes
1answer
207 views

245 MB RAM are detected instead of 8 GB Ubuntu 64 bits

I run free -m and I got 245 MB of available RAM while I have 8 GB ! My BIOS detects 8 GB ! What can I do to 'recover back the RAM space ? free -m outputs this: total used ...
0
votes
1answer
94 views

Can Ubuntu cope with bad RAM?

I have installed Ubuntu on a computer which hat bad/defective RAM (memtest86+) showed that later. The thing is I did not have any problems with Ubuntu 14.04 while Windows 7 installed on the same ...