RAM (random access memory), either RAM hardware or software and operating system use of RAM.

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Attempting to access RAM /dev/mem… says “Operation not permitted”

I am using Ubuntu 12.04 I read the following tutorial on how to access the contents of RAM in Linux.... http://www.rootninja.com/using-dd-to-search-for-strings-in-memory-or-devices/ Code: dd ...
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49 views

Seemingly inconsistent output from `top` re: Swap header vs. SWAP column

How should I interpret this seemingly inconsistent output from top re: swap? Running free confirms that no swap space is in use: $ free -m total used free shared ...
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611 views

Is it possible to use GPU memory as more main memory?

I have a ATI Graphics Card with 1G of RAM. GPU-Z says that 143MB (dedicated) and 75MB (dynamic) is being used on the card (GPU). Is it possible to get your PC to use GPU as more RAM (main memory) for ...
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56 views

What desktop computer hardware specifications are most important for database heavy applications?

I am purchasing a new personal desktop computer with the hope of improving performance for database-heavy applications (mostly data mining). I will want versatile hardware for all sorts of future ...
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100 views

Sony Vaio VPCEE2E1E memory upgrade issue

I own Sony Vaio laptop VPCEE2E1E and I recently upgraded RAM MEMORY from default 3GB to 4GB after that operation I'm facing serious problem with performance.Windows shows that I have only 1.74GB ...
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562 views

Random BSOD crashes when all RAM slots are occupied

Although I'm a long term user of other StackExchange sites this is my first question on SuperUser, so please let me know if I've neglected any community customs I am experiencing regular BSOD crashes ...
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30 views

Back of the envelope calculation for speed of matrix multiplications

I'm trying to develop an intuition for how feasible/scalable machine learning algorithms are. The dominant cost is always matrix multiplications, but there seem to be no readily Google-able resource ...
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172 views

Apache memory usage never goes above 5%

I'm deploying an application that uses ImageMagick into VPS server. I tested in on two different OS: Centos6 and Ubuntu Server 12.04. On Centos6, the application is working properly and when ...
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525 views

What's so special about `hal.dll+12a3b`?

I have a BSOD/STOP 0x124 problem that keeps haunting me for a very very long time: It always happens at address hal.dll+12a3b. In my searches for an explanation/solution, I found suggestions that ...
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210 views

Mac suddenly says I'm out of space, and terminal says low on swap space

I'm running a pretty dated Mac but its what I have and can't afford throwing hardware at the issue. I am on Mac 10.6.8 Suddenly Terminal says Terminal has detected the system is running low on ...
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1k views

Down-clock 1600Mhz RAM on Macbook Pro Mid 2009

My Mac (Mid 2009- MacBookPro5,5) installing OS 10.8.2. Currently, it is using 2 x 1GB (1066 Mhz). My friend gave me 2 x 2GB (1600 Mhz) of his 2012 Mac. After installing 2 x 2GB (1600 Mhz) on my ...
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45 views

Using the heap command line tool

I am getting a crash while using libgmalloc and I get a complain which says something like Failed to VM allocate XYZ bytes Explicitly trapping into debugger!!! Now I when I encounter this ...
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246 views

Seagate external hard disk does not power down

When my computer is off, this external hard disk remains on, consuming power. It is permanently warm, and inside components are active (perhaps the fan?). I have a UPS for the system so a complete ...
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210 views

Overheating RAM, ddr2 motherboard 2 slots

Recently, I bought a new memory stick to speed up my machine, which is the exact product that I have been using. The problem is either of the RAM overheats like after 5 minutes once my computer turns ...
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160 views

Unusual memory usage spike

Ok, on Windows 7 64 bit, I basically use Firefox to browse the web, with a DSL broadband connection.Sometimes while surfing, I see the computer slows to a crawl for a few minutes and then goes all ...
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74 views

How big is PATA throughput on original Macbook Air (Rev A)?

I still have one of the original Macbook Air's that I use sometimes. It's got 2Gb of RAM and whenever it's filling up and starts paging, the whole things becomes barely responsive. I've heard SSD's ...
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335 views

How many RAM Hardfaults is too many?

Trying to play BF3, sometimes seemingly randomly, it will start lagging. I assumed despite 4GB of RAM, it might be hitting its max. I just however noticed a lot of RAM Hardfaults. Is this a lot, or ...
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193 views

Asus P4B SDRAM Upgrade

I have to fix a PC for a friend - and - bought RAM because 256 MB SDRAM PC133 is not enough for WinXP. I bought 2x 512 MB SDRAM PC133. If I insert one stick, it doesn't matter which one, the PC won't ...
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38 views
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Intel - How pre-allocated memory and legacy VGA works

Reading a few datasheets for Intel processors and I keep reading - This address range extends from 1 MB to the top of physical memory that is permitted to be accessible by the IMC (as ...
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37 views

How to keep mysqld alive with minimal memory?

I have a rackspace server that I have been renting to run my personal projects upon. Since I am cheap, it has 256Mb of RAM and honestly can't handle a lot. Every once in a while, when there is a sharp ...
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17 views

Will this RAM work with my Intel mobo (DX58SO)?

I'm planning to add three DIMMS so I have 12 GB triple channel. Memory is: 4GB Module - DDR3 1333MHz Part Number: KVR13N9S8/4 Specs: DDR3, 1333MHz, Non-ECC, CL9, 1.5V, Unbuffered, DIMM, ...
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32 views

How much memory is used for a particular process

I am using qsub for submitting jobs on the cluster(SGE). What i want to know is when i submit a qsub job and after it finishes, I want to find how much memory it actually uses up so next time I ...
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72 views

asus motherboard: one long beep, 3 short beeps, one short beep

When my computer starts, monitor shows no signal, you can hear the computer trying to do something (almost sounds like starting a car with multiple tries). Then I hear one long beep, three short beep, ...
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15 views

What is exactly shown by “perf” as page-faults?

I want to count the number of disk accesses during a complete run of my script. My bash script runs 2 other executable files locally and 2 other executable files remotely. something like this (those ...
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40 views

Extra memory slows my laptop to a crawl

I have an Acer Aspire "TimeLine" 4810TZ, model MS2271 running Windows 7 (64-bit) with 3GB of RAM, which is comprised of a 2GB and a 1GB SODIMM - Both DDR3 with a frequency of 1066. I was told that my ...
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61 views

Why is Jenkins using so much memory?

I just started htop in my VPS and filtered to Jenkins to see if this was what was taking so much memory. Holy crap?! I only have two build executors and only ran the service once (on machine bootup), ...
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144 views

Windows 8 “Insufficient memory” error whilst copying through .bat files

Info: Sys: Windows 8 Pro 64-bit (6.2, Build 9200) (9200.win8_gdr.130531-1504) BIOS: Default System BIOS Processor: Intel(R) Core(TM) i7 CPU ; 960 @ 3.20GHz (8 CPUs), ~3.2GHz Memory: 14336MB RAM ...
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27 views

Laptop plays music choppy after a few minutes of idling

I noticed that when I'm doing my homework and let my laptop play music, the music becomes choppy after 10-15 minutes. Like my laptop's freezing or something, but as soon as I do something (bring a ...
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73 views

RAM capacity vs power consumption in S3 Suspend-to-RAM mode

My netbook with 1GB DDR2 RAM module takes 16% of battery for 24 hours of S3 standby mode (STR - Suspend-to-RAM). That amounts to the power consumption of 0.32 Watts in standby. That also means that ...
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160 views

csrss.exe and dwm.exe eating huge amounts (2-6GB) of RAM

These two processes (csrss.exe and dwm.exe) sometimes decide to consume enormous amounts of my RAM. This only happens when I have been away from the computer. I move the mouse to wake up the monitor ...
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40 views

Relation between a memory map and address space in the architecture?

I will just post some quotes about each of these two from somewhat reputable sources: CPU address space from techtarget: Address space is the amount of memory allocated for all possible addresses ...
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Suddenly a large set of applications seems to have memory leaks, allocating more and more memory nonestop

Like already said in the title, a large set of applications is suddenly having massive memory leaks. These are all programms that I have use for some time already, and none of them had this problem ...
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39 views

Is my swap space being over used in OS X in /private/var/swap?

I'm using Disk Inventory X to look at whats taking up the most disk space on my HD. I understand that private/var/vm/ is where the OS stores items when it goes into hibernate. I have 8GB of ram, but ...
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48 views

Black Screen + Freeze after a couple minutes of gameplay (Windows 8)

Since this morning I'm getting random freezes after a couple of minutes of gameplay. It started with Battlefield 3, which made my screen turn black and I had to push the reset button since ...
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142 views

Mac has become insanely slow : Processes SystemUIServer, UserEventAgent and loginwindow using a lot of memory

I have been using my Mac for for many months without any problem. But recently all of a sudden the Mac became insanely slow. I opened Activity Manager to see what was happening. For three processes ...
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60 views

Huge file input/output

My question is a bit general, but the application is very practical. I wonder, how does system (Linux in particular, but general mechanisms are interesting too) handles reading/writing of huge (larger ...
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379 views

How do I reduce chrome's CPU and memory usage on page load?

I am running a Tampermonkey script in Chrome that auto-refreshes every 4-8 seconds a page within a page range that looks for changes in the HTML elements and acts within a certain threshold. The ...
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138 views

How to kill AMCMenu process which uses my whole ram for mac os 10.8.5 macbook pro?

whenever i kill AMCMenu through activity monitor it starts again and uses my ram. i have restarted my computer many times .please help . here the link to AMCMenu process sample : ...
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284 views

Vaio VGN FW41j/PCG-3H1M black screen with 8GB DDR2

I have a Sony Vaio VGN-FW41j(PCG-3H1M) which I configured and bought in 2009 on the German Sony Website. The relevant specs are: CPU: Intel Core2Duo T9800 GPU: AMD/ATI Mobility Radeon 4650, 1GB DDR3 ...
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252 views

Installed new memory, dell laptop, bios posts (recognizes memory), windows won't load

I have a Dell Latitude e6520 that had 2X4GB memory. I found on sale 2X8GB crucial memory, which my IT buddy said the specs match and should work. It has an intel i7-2620 processor with windows 7 x64. ...
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57 views

Which processes do contribute to “commit charge”?

I want to put the question squarely: what is the contribution of every process into commited memory. Process Explorer refers to the total memory committed and commit charge but only Private bytes, ...
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457 views

Memtest 86 for my laptop errors 'memtest86 unexpected interrupt halting

I have a huge problem with my ICOM PrestogeBook laptop. Its parameters: Mobo: Compal IFL90 CPU: Mobile DualCore Intel Core 2 Duo T9300, 2500 MHz 4 GB RAM, 2x2GB Graphics: ATI Mobility Radeon HD 3400 ...
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50 views

When does Windows decide to pull out pages from Working Set?

I am looking at the distribution of physical memory using the RAMMap tool by SysInternals. The distribution (see image below) shows 1.7 GB in Free (Zeroed) memory list 1.2 GB in Working Set list ...
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Ongoing computer lock up issue

My system is as follows Phenom II 945 stock Gigabyte GA-M720-US3 Windows 7 64bit 4GB Crucial DDR 2 4-4-12 Palit Geforce 460 GTX Samsung spinpoint F3 500gb HDD 3.5 inch floppy drive (yes...I ...
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180 views

Window 7 is crashing (ACER Laptop)

I have a question regarding Windows 7 and determining the possible causes for it crashing. I have a ACER laptop which I purchased 1 year ago with Window 7 installed on it. It has worked fine, but ...
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How to limit the amount of memory that OS X uses?

In linux, one can use the mem=xxxx boot argument to specify how much memory the OS can use. For example, if you say mem=2048 the OS will believe that your computer has 2048 GB of ram regardless of ...
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131 views

Why does Debian crashes with OOM

I recently upgraded my server from Debian squeeze i386 to wheezy amd64 by reinstalling and reconfigurating. Additionally I wanted to be able to start virtual guests, so I installed XEN, too. I got ...
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516 views

Ubuntu 12.04 freezes on laptop when running memory/cpu intensive process

I have a Dell Precision M4500 laptop with 4GB RAM memory and Ubuntu 12.04 64-bit installed with 8GB of swap memory. After launching usual Java development environment (Eclipse, MySQL Server, SQuirreL, ...
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42 views

query related to RAM

I am currently using DELL XPS laptop and from some days back whenever install any new game it displays that my RAM is too low to run the game.My laptop has 2nd generation corei7 2.0 GHz processor, 8 ...
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68 views

Macbook stuck on the loading screen

My Macbook stuck on the grey screen with the apple logo and the spinning wheel. I changed RAM memory (after crash) recently, but it worked fine for some time. I've already tried and it didn't help: ...