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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What Does Cached Memory Mean when Viewing htop?

While viewing the reports of htop, I would like to know what the orange/brown 'cached memory' bars actually indicate. Really I'm looking for a more practical explanation of what I'm looking at, rather ...
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427 views

Only 3GB of RAM with PAE kernel on 12.04

I've installed 4GB RAM on my Thinkpad X60 running Ubuntu 12.04. Then I've installed PAE-enabled kernel. Now uname -r outputs 3.2.0-50-generic-pae My CPU is capable of PAE: $ grep pae /proc/cpuinfo ...
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440 views

Tons of Processes Running

I have an Ubuntu 13.04 running on a P4 computer with 1 Gb of RAM (I know, I need to get a new one). I recently have been getting crashes, and a lot of my memory is being used. So I looked in Top and ...
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76 views

Ubuntu memmory consumption problem [duplicate]

Ubuntu Gnome on my laptop boot up using about 310 MB Ram. When running couples of program, the system takes 700 to 900 MB. Then, I close all programs, Ram usage drops but it keeps at 450 ~ 600 MB Ram. ...
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2answers
420 views

Combining two laptops to increase memory

I have two laptops with the following specs and I want to connect them to increase memory so that I can increase the performance of the scientific calculations that I need to do at home. HP Pavilion ...
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1answer
688 views

/var directory and redis

In terms of the filesystem hierarchy standard, the /var directory contains variable files — files whose content is expected to continually change during normal operation of the system— such as logs, ...
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1answer
111 views

get the resident memory of indivdual threads of a process using bash shell

If I want to find the resident memory a process uses, I might use something like "ps aux | grep apache2" or "sudo pmap -d 1130". However, I have one process that has 25 threads, and I would like to ...
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2answers
3k views

How much ram is being used on my laptop?

I have 3987MB of RAM on my laptop. Task (System) Manager says that I am using 700MB of this RAM, whilst the command "free -m" says I am using nearly 1500MB. Which one is correct and why do they show ...
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1answer
69 views

Edit Ubuntu Details?

Long story short, I need to make it look like my computer has 2GB of Ram, instead of 4GB. Is there a way I can edit a file or something, to make it change in the System Details?
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1answer
124 views

Will my server reboot itself if the memory fills up?

I just got a VDS, all said and done with my website, forums and email server set up along with my Teamspeak server. My memory usage is at 60% when it boots and grows to 70% after about 3 hours of ...
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465 views

Task Manager Memory Usage Does Not Agree with “top” command Memory Usage

I just installed lubuntu 12.04 and have been monitoring memory usage with the "top" command and the task manager GUI. I'm currently seeing 448 MB of physical RAM used with "top". However, task ...
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542 views

HUD is eating my RAM

I'm running 13.04 64bit on a Dell Latitude with 8GB RAM. Recently, the HUD search results are being sorted differently, I suppose that's due to Unity updates. What's worse is that my system is ...
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1answer
398 views

Trying to undo some commands

I have done the following commands trying to make Ubuntu work faster: echo 100 > /proc/sys/vm/overcommit_ratio echo 2 > /proc/sys/vm/overcommit_memory #/etc/sysctl.conf прописываем: ...
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1k views

Comparing Virtual Memory Size with Resident Size

I came across this stackoverflow post: http://stackoverflow.com/questions/10400751/how-do-vmrss-and-resident-set-size-match The answer voted correctly states the following: "So, VSS should be ...
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1answer
2k views

64bit Ubuntu 13.04 not recognizing additional 4GB RAM

OS Info sysadmin@linux01:~$ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=13.04 DISTRIB_CODENAME=raring DISTRIB_DESCRIPTION="Ubuntu 13.04" sysadmin@linux01:~$ uname -a Linux linux01 ...
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1answer
460 views

Relation of swappines and zram

I have been interested in zram so I tried to test it. But as I continue to read the guide on what and how to install it, I have realized that it creates a file /dev/zram0 and mounts it as a swap, I ...
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3answers
1k views

Usable ram is half of total memory

Recently i had added a 2GB DDR3 ram in my acer laptop. As a result my total ram is 4GB (2x2). I was running ubuntu 12.04 32bit(pae kernel). Everything was working fine. Now i have upgraded (new ...
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2answers
412 views

My computer has originally 1,5 GB of RAM but K-X-L-Ubuntu, Debian ect… give me less than 463 MB

Why is that? When I was running Windows XP on my computer, I had 1,5 GB of RAM. I have two questions: Why is that? Can I get my 1,5 GB of RAM or Ubuntu considers that 1,5 GB on Windows is 500 MB in ...
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1answer
121 views

How to re-encrypt my swap to activate it again?

A while back I was messing with my swap space, turning it on and off using sudo swapon -a and sudo swapoff -a. Since I generally have enough RAM anyway (6GB) I totally forgot about it. Currently I am ...
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244 views

htop showing duplicate applications with very odd bizarre results upwards of 20,30,40 or more, see screen grab

I have attached screen shots of htop and it's bizarre results. Can anyone explain what is happening here? It shows this new copy.com app taking up like 500% of my memory if you count it up.
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1answer
542 views

Wheres my memory going?

My machine keeps 'freezing' before eventaully logging out with all the programs exiting. This is rather annoying, and I think its because I keep running out of memory. I am not running any custom ...
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1answer
805 views

can my 2 GB sd card be used as ram like in windows 7? [duplicate]

I'm trying to increase the ram on my old computer with a 2 GB sd card. You can configure Windows to use an SD card like RAM and I'm wondering if Ubuntu has that same ability.
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2answers
611 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 ...
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1answer
198 views

Mem vs cache in system monitor?

In the above menu, what does the difference between Mem and cache? Are they both use memory from my RAM? Which program use cache?
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1answer
2k views

How to check what type my video card is and its memory size?

I need to install some programs that require minimal size of video card memory, how do I get the size and possibly what vendor and type of my video card? Output of lspci | grep VGA | cut -d " " -f ...
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558 views

How Much Ram Does Ubuntu Need To Run

Well i have an old eMac and i wanted to replace the operating system with Ubuntu but I don"t want to break it.
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1answer
344 views

is dmidecode's max memory report is accurate?

After googling for a while I've found "sudo dmidecode -t 16,17" to check max amount of memory in my laptops. Based on its report my HP Pavilion g4-1002tu laptop can accept a max of 16GB, while the HP ...
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1answer
4k views

How to troubleshoot high cpu problems related to postgres and postmaster service?

I'm using an open source(RHCE 6.2) based machine running SIEM software , when i do the top command i see postgress postmaster both eating 96% of cpu usage? Is there a way to pin-point or see ...
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1answer
10k 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?
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168 views

Viewing page tables in filesystem

I know that the page table is managed by the linux kernel, though I am not sure if it is available on the filesystem. I'd like to view information about page tables from the command line. As ...
0
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1answer
344 views

Installing updated BIOS for Dell 530s, keep getting “insufficient memory” error?

I have tried using both virtual and real FreeDOS disks to load the file, but I can't get it to work- I run only Ubuntu 12.04 and I'm looking to upgrade my CPU, but every time I try to run the ...
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How to find how much RAM does my computer have?

How do I find out how much ram my computer has? I am running Ubuntu 13.04.
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1answer
308 views

is it right that cups-browsed uses 1327MB RES memory? [closed]

I'm running gnome3 in raring. I have 4GB ram, but I'm experiencing high use of swap. Looking with htop I see (among other processes): PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ ...
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1answer
659 views

Why is find running here?

I noticed very high IOwait, even copying/pasting from NetBeans to Firefox was taking several minutes and hanging for a long while. In powertop, I noticed: Usage Events/s Category ...
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2answers
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Testing my system, I need a script that will use as much ram and swap as possible

I'm testing my system with zram, I need a script that will use as much ram as possible. This script should fill up my ram with random stuff not just zeros.
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1answer
1k views

How do I use/enable zcache?

I'd like to try out zcache but I just can't figure out how I would enable it, do I have to compile a new kernel with zcache enabled? I'm running Ubuntu 13.04 64bit
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0answers
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Is there a default limit to the amount of memory a process may use?

Running 64-bit Matlab 7.12 on a 64-bit 10.04 Ubuntu Server. When I try run a big problem that should need 46GB of memory (the server has 72GB of Memory and plenty of swap space), the experimental ...
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1answer
272 views

Ubuntu Compatibility

I'm in the process of building a computer for a customer who has requested Ubuntu 13.04 to be installed could someone tell me if the following components are compatible. CPU: Pentium G2020 ...
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1answer
81 views

New computer installation problems

I've just bought a new desktop computer: Gigabyte 970A-DS3 NVIDIA GeForce GTX 650 AMD FX8350 RAM: 16 Gb I'd like to install 13.04 64-bit, but when I try to install, mouse doesn't work at all ...
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0answers
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Ubuntu 12.4 on 3.4.45 kernel: Can't access USB memory stick

I installed kernel version 3.4.45 [LTS] on ubuntu 12.4 on a Acer laptop. With this configuration, the USB memory drives can't be accessed, some details are follows. Upon inserting the USB drive dmesg ...
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1answer
322 views

Memory allocation of C++ in Ubuntu

First of all, I'm sorry if the question doesn't belong here. I want to make sure whether this issue has to do something with my Ubuntu. The C++ code below makes 2621440 integer variables. Each ...
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5answers
12k views

Ubuntu 13.04 ram and CPU maximum support? [closed]

I'm learning about ubuntu, but I do not know the ubuntu 13.04 Ram and CPU support up to how much??? hope you help me
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2answers
259 views

Is there anything I should know before changing out my ram sticks? Ubuntu 13.04

Okay 1st off let me start by saying I have only been using Ubuntu..or Linux in general for about 3 months but in an effort to get the most out of my old tower I have decided to upgrade my ram ..I have ...
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1answer
301 views

RAM slot free or not

This question might not be so relevant here, but I want to know if there is some command tool that gives me the currently available RAM slots in my machine, also if any of them is free, and ...
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1answer
1k views

How to launch google-chrome with custom parameters by default?

I want to launch chrome and chromium from the unity launcher with the --purge-memory-button option. For chromium I was able to add the above parameter to /etc/chromium-browser/default but that's not ...
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1answer
157 views

Is this Ram usage normal?

My system is Ubuntu 13.04 64 bit + Unity and it uses ~600mb with no other processes-apps open and with preload 900mb, just the core system. Is this the expected amount? It seems a bit steep to me but ...
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2answers
2k views

How can I measure how much RAM has been used by a command

I'm trying to measure the memory of a process that I call via the command line (i.e., I want to find out much RAM it takes to for the process ). Is there any command that I can add to the command ...
3
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1answer
272 views

ux31a freezes when running out of memory

I have difficulties to understand swap policy. I have installed system (ubuntu 13.04 but 12.10 had same issue) with 4gb of swap partition because ux31a has 4 gb of memory. Problem is that every time ...
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2answers
847 views

How do I change how much disk space Ubuntu has?

I installed ChruBuntu on my Chomebook Acer C7 about 2 weeks ago and I chose to allocate 10 gigs. I didn't know that that would be my amount of disk space I would be allowed to use. I want to install ...
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1answer
93 views

Available RAM not being used

I am running a program that takes a significant amount of time to complete. According to my system monitor, only 20% of the available memory is being used (1.6GiB out of 7.7GiB available). I'm ...