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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ZFS - Always Out of Memory

I read that ZFS was set to use all physical memory except 1GB on systems that have 4GB or more. Since I have virtual machines running my home-server that is running the ZFS filesystem, I wanted to ...
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13 views

Get OS Process List with Volatility From a memory dump

I am wondering if anyone can help me I am trying to figure out how to get a count of the processes that were running in the OS process list using volatility from a ram dump. $python vol.py pslist -f ...
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What is “cached” in the top command?

When running top, I get: top - 09:10:52 up 18:37, 1 user, load average: 1.56, 1.33, 1.15 Tasks: 39 total, 1 running, 38 sleeping, 0 stopped, 0 zombie Cpu(s): 0.1%us, 0.6%sy, 1.0%ni, ...
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2answers
575 views

How can I change the frequency of the RAM, and also know its value from Ubuntu?

I am using two modules of RAM and I would like to know their frequency because at simple sight, I can't see any sign of it in the modules. When I ran memtest one time, it showed me the test settings' ...
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0answers
24 views

“-/+ buffers/cache memory” is zero

i have an OpenVZ VPS with ubuntu server 14.04.2 and i can access to a SolusVM control panel. Recently, "memory usage" is always 0 KB, and only "vswap usage" shows real swap usage. if i run free -k i ...
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1answer
50 views

Could I install Ubuntu on SD card and runt it from my Chromebook?

So I just installed Ubuntu on my Chromebook. Now the main issue is that the internal memory is limited. I am thinking of using a 64 GB SD card to expend the memory. Would it run as smooth as it does ...
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2answers
51 views

RAM memory size info confusion; F2 key or “System Setting”?

I am receiving two different figures for my RAM size. I have installed 2x2GB RAM and F2 key says I have 4028MB but Ubuntu System Setting "Detail" aka "About this computer" says I only have 2,9G. I ...
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23 views

Ubuntu 12.04 only recognising 2.9Gb Ram out of 4Gb

Yes it is a 32-bit installation, but there is supposed to be PAE that allows it to use all of the ram. The command: sudo lshw -class memory | grep GiB -m 1 tells me that yes there is 4Gb ...
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13 views

Prepare for a huge computational script (RAM, SWAP…)

I run lots of python scripts on my laptop, but this time the situation is tricky. I need to read dump files, and perform huge calculations, so I need a lot of RAM and space. A crude calculation ...
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1answer
17 views

How to check if there is already a swap area?

I am using Ubuntu 14.04 on my laptop with 4 GB RAM. I had chosen option to "replace Windows 8 and install Ubuntu with LVM" when installing Ubuntu. Now I wanted to create a swap partition, I executed ...
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1answer
30 views

Virtual RAM folder in Ubuntu?

I would like to have a folder mounted as temporary, which is actually my RAM. This is so that, for example, I could copy a movie into my RAM, unplug my external drive, and then watch it. Can this be ...
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1answer
30 views

Ubuntu 14.04 RAM not usable — mallocate problem

I have a strange situation where my Ubuntu server (14.04) is not recognizing all of the memory installed in my server. I have a HP Proliant DL 380 G3 server (32bit) with 10 GB memory. I couldn't use ...
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2answers
2k views

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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1answer
21 views

Is it possible to limit cache memory to a process?

I am using network capture tool named dumpcap and it is consuming too much cache memory. So other processes getting no memory to run. htop command shown cache memory as 29 GB in Meters. Can ...
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0answers
40 views

My laptop very slow, Is the problem with Hard Disk or RAM ( very low Timing cached reads value)

My laptop has been running very slow, I reinstalled Ubuntu and also tried Windows but didn’t find any difference. I thought this could be a problem with my HD. I tried the below tests with hdparm ...
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40 views

automate processes based on priority and memory size.

I have written a script to output vmstat etc according to user input and have also written a script for process control based on user input. the process script allows the user to use a series of menu ...
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21 views

Questions regarding RAM wiping using Sdmem on logout

I have a few questions regarding the thread. 1) Would executing sdmem before i log out wipe rests of my encryption key out of the RAM of my laptop so that i can let the camera record and be secured ...
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4answers
57k views

MicroSD card is set to Read-only state. How can I write data on it?

I have a MicroSD card reader in my notebook. When I insert a MicroSD memory card into it, I can't write any data on it - it's read-only. The same thing happens when I try to do it under root. And I ...
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2answers
471 views

How do I run memtest86+?

If I encounter a situation where I suspect my machine's RAM might be going bad, I might need to launch memtest86+ to check it. How can I do this using Ubuntu? Are there different methods for launching ...
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489 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 ...
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5answers
847 views

How to log memory usage per minute on Ubuntu Server?

I checked few programs such as htop or top command but couldn't find any features for logging per minute. Is there a way to do that for tracking memory issues ? edit: I was using linode and decided ...
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2answers
36 views

record of swap/memory usage - how to do it?

Here is a quick intro to the problem, but if you're interested only on the question, I think you may skip to the last paragraph. I have installed Ubuntu Mate on my laptop with the recommended amount ...
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13 views

Virtualization hardware review

I'm running an home server based on Ubuntu 14.10 for running some services that I need on my LAN such as: mysql db, LAMP stack, NFS share, Squid proxy and so. My machine is built on Intel(R) ...
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1answer
21 views

Real & accurate memory usage statistics (top)?

Need accurate memory usage statistics to figure out what size matrix I can work with without choking the RAM on this laptop. ;) I am using top to figure out how much memory an app I'm working on is ...
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1answer
54 views

How do I know how much RAM can I upgrade my laptop?

I have a HP Pavilion laptop quite old (2008) which I would like to increase the RAM. Ideally I would like to have 8Gb but I have no idea how to check if hardware could support this extension. These ...
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13 views

Desktop computer slowdown on heavy loads

In Linux generally, is it possible to limit cpu, ram and iops(hdd,nic..) given for processes not belonging to core operating system, including system libraries, X server, system utilities, user ...
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61 views

Gluglug ThinkPad X200 Ubuntu?

I'm looking at buying the Lenovo ThinkPad X200 from Gluglug (http://shop.gluglug.org.uk/product/libreboot-x200/) and they say they have Libreboot so you can install any OS, but I'm wondering if the ...
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0answers
33 views

Why my memory is shooting to nearly 100 percent which makes my laptop unable to work?

I am a newbie. I am currently using xubuntu 14.04 on my old dell laptop (~8-9 years old). When ever i watch any video on YouTube or similar site the video is not coming properly. I am not able to do ...
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0answers
12 views

Ubuntu VM shows different RAM then what vCenter is showing

I created a 64-bit VM with 4 GB of RAM and installed Ubuntu 14.04 64-bit The command, free –g, shows a total of 3GB The details screen on the desktop shows 3.9 GB vCenter Server Performance Monitor ...
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29 views

Wrong amount of memory show in Settings -> Details in Ubuntu 14.04 [duplicate]

I have installed 4Gb as two modules but only 2.9Gb is shown in Settings.
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3answers
5k views

Why is my /dev/loop0 showing full?

I have sufficent memory , but somehow I get my /dev/loop0 showing usage of 9 GB here's my df-h. Filesystem Size Used Avail Use% Mounted on /dev/loop0 12G 10G 1.4G 88% / udev ...
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26 views

Zcache Usage in Lubuntu

Recently I appended zcache to my grub configuration: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash zcache" But I am at a loss as to whether zcache is working or if I need to do something else. There is ...
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2answers
3k views

Why runs evolution-calendar-factory?

Why runs evolution-calendar-factory? Here are some processes (created with ps aux --forest) lightdm \_ /usr/bin/X -core :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch \_ lightdm ...
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0answers
27 views

Jave heap space error appearing Linux ubuntu 12.04

I'm running my program and this error appears after some time java.lang.OutOfMemoryError: Java heap space at HadoopMyapp.HistogramPair.<init>(HistogramPair.java:25) at ...
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2answers
183 views

Why do programs (including Xorg) close when out of RAM but Swap is near empty?

I have some swap configured and I believe activated... Filename Type Size Used Priority /dev/sda5 partition 7811068 1124912 200 ...
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0answers
26 views

java.lang.OutOfMemoryError: Java heap space

I'm using Hadoop in my application, but just before the program exits I get this error java.lang.OutOfMemoryError: Java heap space I already modified the mapred-site.xml and added this property to it ...
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1answer
38 views

How to free up my laptop's RAM?

I have an old DELL laptop with 2GB of RAM and Ubuntu 14.04 (64-bit) as its OS. Many times I am out of RAM and thus every thing goes very slow! I think there is many background programs (services or ...
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2answers
107 views

Gnome System Monitor shows only 5.7 GiB RAM of 8GB installed

Some time ago, I reinstalled Ubuntu, like I did a lot of time before. Since then, Gnome System Monitor and System Information (and any other graphical tool I tried, for that matter) show only 5,7 GiB ...
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2answers
2k views

Ubuntu 14.04 (amd64) not detecting all of my memory

I've got 4gb of RAM installed in my machine but Ubuntu only detects 2.8gb of RAM If I run uname -a I get: Linux DeLillo 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 x86_64 ...
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1answer
35 views

Can I install 8gb of memory to full Macbook 5,1 Ubuntu install?

Seems that 8gb of memory is not stable in original Macbook 5,1 if I'm not running "Mac OS X 10.6 "Snow Leopard" or higher and have Boot ROM Version MB51.007D.B03" ...
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1answer
24 views

Theoretical question about memory usage

I'm wondering about following issue: Taken some abc console(no matter if bash,zsh or something) in some *nix system. If I start some process stuff which uses 2MB of memory and then launch second ...
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0answers
76 views

X.org is allocating more than 900MB of RAM but xrestop says ~1/40th of that is actually used; how I force it to free the rest without restarting X?

So X.org is allocating an insane amount of RAM: right now 910MB (according to the RES column in htop), second only to Firefox (really Nightly) (at just over 1GB) and trailed by GNOME Shell (at only ...
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1answer
160 views

4GB out of 8GB total reserved 64bit 12.04 why

Can anyone explain why 50% of my ram is being reserved and for what? I do have two radeon 7990 cards but surely the ram is not reserved for them? root@stan-desktop:/home/stan# cat /etc/issue Ubuntu ...
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0answers
34 views

httpd process high memory utilization

My httpd process is utilizing high memory per process. My site is php coded and create on drupal as a content management system. We have a high end server with 8 cores and 16 gb RAM. my per process ...
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0answers
27 views

problem using mmap() using linaro running on zynq SOC with ARM processor

I am trying to execute the following code in linaro on zed board. My problem is that I am trying to access the Physical locations by mapping them to virtual locations and the problem is I am trying to ...
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2answers
474 views

How to increase video memory in Wine? (Wine version 1.6.2)

I'm trying to run a program(BeamNG.drive) on Wine 1.6.2, and there seems to be a problem. See, here's the thing: I can actually get it to load most of the way. But just before it would have finished ...
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0answers
56 views

swap memory value / percentage meaning

Swap memory can be set between 0 to 100 What Does It means when we set swap memory to .. ? swappiness= 0 Tells the kernel to avoid swapping processes out of physical memory for as long as ...
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4answers
30k views

How to check video memory size?

Is there a way to check the size of the video memory? Specifically, is there one that works accurately for both integrated GPU's as well as PCI/AGP graphics cards? Many integrated GPU's have ...
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1answer
148 views

Ubuntu 14.04 detects 4 out of 8GB of ram

I've been dual-booting my laptop for about six months now, on one side Ubuntu 14.04 and on the other Windows 7. When I bought this computer two and a half years ago, it had 8GB of ram. My Windows ...
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4answers
32k views

How do I clean or disable the memory cache?

After the system starts, in a few minutes my memory cache fills up and it starts using the swap. Here's a screenshot of /proc/meminfo. However, if I can disable this process / clean the cache once ...