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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How to increase the disk space of an Ubuntu VMWare guest, without the cd?

I powered off the VM and on the VMware side increased the allocated disk space. I did this by Edit Virtual Machine Settings -> Hard Disk -> Utilities and so forth. It then warned me that I should ...
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Used memory in Linux? [duplicate]

Possible Duplicate: How can I monitor the memory usage? I see in System Monitor, used memory only 332MB, so free memory is ~3.4GB, but when I use command line: free -m, used memory is 1GB, ...
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994 views

zeitgeist-daemon excessive RAM usage

I have installed last week Ubuntu 11.04 64 on a new machine. I am running the GUI using Unity. However I have noticed that after 1-2 hours the process zeitgeist-daemon starts using excessively the ...
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Moving files to /dev/shm ramdisk doesn't increase RAM usage?

I've been wanting to make us of a ramdisk on my Ubuntu system for a while, and have done a bit of reading online. Most of the advice centres around using /dev/shm to move files into RAM. I wanted to ...
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what is the nm-applet and why does it take so much memory?

I was wondering why my memory useage was so high, what is this thing that take a whopping 1.2GB of memory. Please and thank you.
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Can I use all my RAM for application data?

I have yet another question about "where is my Linux memory" Question goes: can I use cache for application data? On my laptop I have 1GB ram. Situation after some time of work: browser takes 400MB ...
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557 views

Physically check ram without rebooting the server?

I have a production Ubuntu server in a remote location, which recently started to behave strangely. I suspect RAM errors, and want to have a physical RAM check without rebooting, Live CDs or ...
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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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Ubuntu 12.10 and VMware Workstation 9: RAM caching causes severe performance drops

I have read plenty of threads on memory caching and the standard response of "large cache is good, it shouldn't effect performance", "the kernel knows best". I have recently upgraded from 12.04 to ...
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240 views

Where is my ram?

I have 2GB installed on my machine running Ubuntu 12.04. After some time of use, I see much of my RAM used. The RAM does not free enough even though I closed all my programs. I included 2 ...
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656 views

Will Kubuntu run on 256 MB Ram?

For two weeks, I have been trying to install Kubuntu 12.04.1 onto a Kingston USB stick to run on my Acer Aspire 1362 Laptop, which has 256MB RAM. Firstly I downloaded: ...
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How do I tune WordPress to make my site more responsive?

I have a Linode that has Ubuntu loaded and am hosting a WordPress site. I would like to optimize my site so that I no longer get Out of Memory errors like the following: Killed process 16660 ...
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160 views

Shutter is using big memory

I included Shutter on my Startup Applications list upon installing the app. For the second time in two days, my laptop would suddenly freeze heavily for a few seconds that I can't even move the mouse ...
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104 views

I had 2G of RAM and I upgraded to 6G and it only sees 3G

I did some searching, and I have a processor that supports pae. It is red when I run cat /proc/cpuinfo | grep pae I do have the 64 bit server version installed, however, I'm using a desktop. (That is ...
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67 views

How I can auto end specific process?

How can I auto end a specific process when it reaches 400 MB RAM? And how do I change it back after I do that ? Is there any program or script or anything ?!
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Compiz Memory leak [closed]

After sluggish performance and freezing for two weeks I finally managed to nail down the culprit to Compiz, I found out it's vital to Unity and is basically an OpenGL wrapper for Ubuntu and Xorg. How ...
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Which is correct for VirtualBox memory usage: Windows Task Manager or System Monitor?

I have configured my Ubuntu VirtualBox install to have a base memory setting of 512MB. When running this install, its fairly sluggish in a way that feels like its thrashing memory. In other words, ...
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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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70 views

Disable memory cache - real reason

OK, before you mark my thread a duplicate I want to say, that I know this very good answer: How do I clean or disable the memory cache? But this is not case for me. I am making some performance tests ...
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Ubuntu 13.10 freezes at times; *ERROR* stuck on render ring

My ubuntu 13.10 laptop freezes relatively frequently, after I recently installed it. It is most common while I am playing Minecraft, but I have also had it happen at other times. I think it may be a ...
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176 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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202 views

Not recognising 4GB of RAM

I have a pae kernel but free -m only shows 3.2 Gigs of the 4 GB that is physically installed. The BIOS shows 4 GB available. uname -a gives: 3.2.0-35-generic-pae #55-Ubuntu SMP Wed Dec 5 18:04:39 UTC ...
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How much swap do I really need? [duplicate]

Possible Duplicate: I have 16GB RAM. Do I need 32GB swap? I have a 4 GB RAM and 300 GB HDD with 8 GB of it as a Swap partition. I'm running 12.04 with hibernate enabled. How much swap do I ...
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Lenovo T60P with 4GB of RAM, Ubuntu 11.04 and 11.10 only see 3GB

I have a Lenovo ThinkPad T60P with 4GB of memory (BIOS sees all 4GB RAM). I have installed Ubuntu 11.04 and 11.10 and both are only recognizing 3GB RAM. Please advise. Thanks. Updates Used 32bit ...
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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 ...
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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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352 views

What is memcached? Is it good for gaming or virtual machines?

This is a performance question: My machine always runs Ubuntu as the main, and as I login, it always starts up a Windows VM and firefox? If I install memcached, will it improve my performance? I ...
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How to check for errors in RAM via linux?

I have ubuntu 11 running off a 3.6gb usb flash/stick drive. System has 4gb ram and blank harddisk (wiped using DBAN tool). How do i check if there are no errors in my RAM ? Is there a guaranteed way ...
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1answer
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How much memory does Ubuntu need? [duplicate]

Possible Duplicate: What are the minimum system requirements for 12.04 LTS? How much memory do I need for Ubuntu? I mean everything that is taking memory space after I finished installing ...
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249 views

Why isn't my SWAP cleared after usage?

When I use a lot of RAM (90-100%) then the laptop normally starts using SWAP so if I look in htop during that intense usage I see it's using 200MB of SWAP. But when I stop using the laptop (the ...
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71 views

Where is everything saved when I “try Ubuntu without installing?”

The reason I ask is because I ran out of space each time Steam tried to unpack, and none of my drives or devices are full.
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How to find how much RAM my computer has

How do I find out how much ram my computer has? I am running Ubuntu 13.04.
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Why is only 3.2GBs out of 5 showing up?

I have 64Bit Ubuntu installed, and a MSI Graphics card. Any ideas on why this might be happening?
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System Monitor and top reporting wildly different memory usage

Lately, while browsing, I often get that the computer comes to a crawl. At the same time I notice memory consumptions of close to 90% by programs/ 10% as cache as indicated by the System Monitor ...
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389 views

typed `apt-get update` now showing a long list of EDAC errors. Is there anything wrong?

I typed apt-get update and then I saw a long list of EDAC i7Core: Lost 127 memory errors Please help me understand what has happened. I am using ubuntu server edition 12.04 LTS UPDATE: I ...
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351 views

Free up memory dump of all the terminated processes

I think my subject is pretty spot on. I am on Ubuntu 10.04 and have the following specs in my computer: i5 Processor with 3.30GHz 16GB Memory 1TB Hard drive 1 Gigabyte on board network I am ...
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576 views

How to speed up installation?

I have an Acer 4736z with 2gb Ram and ubuntu 12.04 is running too slow for my standards. I would like to know if I am running useless processes that I am not aware of and remove packages I will never ...
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1answer
308 views

Why isn't Ubuntu detecting all of my RAM?

I just upgraded my netbook from 1 gb of RAM to 2, but when I type free -g, it only says that I have 1 gb. How do I get it to detect all of my RAM?
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Conky show RAM without buffers or cache

I am wondering if there's a way to get Conky to show the RAM that is in use minus the buffers and cache. When I close a program, the RAM usage goes down in HTOP, but in conky it stays the same. So ...
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How is possible that Ubuntu 12.04 32bit can see all of 6gb ram

I have Ubuntu 12.04 32bit and system is displaying all of my ram 5.7 GiB, how is this possible?
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801 views

Different memory types in System Monitor

On the ubuntu system monitor there are different types of memory listed: Virtual Memory, Resident Memory, Writeable Memory, Shared Memory & X Server Memory. What are the differences between them, ...
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1answer
289 views

Memory is taken up by “invisible” threads

Xubuntu Saucy with 4GB RAM. When the computer is restarted and immediately after login, about 500 MB of RAM is taken according to free -m. Then I run some programs and memory usage goes above 3 GM. ...
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959 views

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 ...
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1answer
609 views

Is my computer slow due to lack of swap

A few months ago, I installed Ubuntu 12.04 alongside with Windows 7 on my Asus EEE-PC 1015bx. It has a tendency of freezing and when trying to investigate I found that a swap partition of only 256 MB ...
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1answer
3k views

Can I create virtual memory?

On Windows you can use virtual memory to use disk space as RAM. Can you do this on Ubuntu?
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1answer
148 views

Memory cache still load, after close programs

It's show on system indicator, I found solution in ubuntuforum to use command sudo echo 3 | sudo tee /proc/sys/vm/drop_caches It's work, but why my ubuntu not handle by itself?
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Would I benefit from reducing, or increasing swappiness?

I've read a few articles now about changing the swappiness level on Ubuntu to possibly increase performance. But I'm very unfamiliar with how swappiness works, would I benefit from increasing, or ...
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Ubuntu 13.10 64Bit version only shows 2.9GB of Ram

I have an old PC at home with 1.5 GB of RAM and as expected its quite slow. So I decided to install Ubuntu on a different PC. Intel Quad Core and 4 GB of memory, and a graphic card with dedicated ...
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Why is almost all of the 3 GB RAM on my HP G62 laptop always used? [duplicate]

I am using Ubuntu 13.10 on a computer with 3072 MB RAM and 20 GB swap. It is an HP G62 laptop which overheats pretty regularly. When I type free -mt in the terminal the output is: free -mt ...