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

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40 views

lshw not reporting memory information correctly

We are working a project where we will be receiving 50+ laptops on a regular basis and we need to get hardware information from them. During some test runs we found some strange results. On a Dell ...
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2k views

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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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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51 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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640 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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43 views

MemTest86+ bad adresses constant despite swapping sticks, processor/MOBO to blame?

(Sorry for the wall of text, but people seem equally critical of missing details) After about 2 years without trouble, I've been having issues recently with system instability, BSODs, random ...
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60 views

Utilizing the full power of my workstation

I am not a gamer. Used to be, 10+ years ago. My workstation is strictly for business: Quickbooks Excel Access General Business QuickBooks is tied to a synchronization engine that is synchronizing, ...
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79 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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193 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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762 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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33 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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190 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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541 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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242 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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240 views

Random freezing caused by khugepaged?

I have a fairly beefy Arch Linux computer, kernel 3.7.7-1-ARCH. However, recently it's been having random freeze ups. Never common, but it'd freeze for a good 15 seconds where no program is ...
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50 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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274 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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231 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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168 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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381 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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199 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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26 views

Should the CPU usage go up to 100% when swap happens on Linux

I had been running a demo system on Linux with the following kernel: 2.6.32-400.1.1.el5uek #1 SMP Mon Jun 25 20:25:08 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux And as soon as swap happens, the CPU ...
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29 views

External monitor take more CPU

My machine seems to hang when I connect an external monitor. My question is, does it take more CPU or Memory if I connect an External monitor to the laptop through the HDMI port? Hardware Specs HP ...
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11 views

How can I see the correct “private bytes” value in process explorer?

I have a process that intentionally uses large amounts of memory. When I view this process in Process Explorer's list view with all memory-related columns enabled, this is what I see: Note that all ...
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48 views

So-DIMM to DIMM adapter?

I have some nice 4GB SO-DIMMs from a broken workstation laptop that I would like to put to use in my desktop. Would this be possible? I did a bit of googling and found a SoDIMM to DIMM adapter on ...
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64 views

Dropbox on a Truecrypt volume eats over 6 GB of RAM, possible memory leak with memory-mapped files

I am using Dropbox with my folder on a Truecrypt volume on an HP Pavillion Touch 14-N009LA with an AMD A8-4555 APU, 8 GB of RAM and Windows 8.1. When I run Dropbox, after about 15 minutes my RAM usage ...
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12 views

Apache and MySql datbase memory consumption issue with Django

I'm writing a relatively simple web-application as a learning project to learn Django, Apache, Mysql etc. in practice. It consists of a web flash/html5 client which makes two API-calls to Django ...
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27 views

Is there a way to choose which applications go to virtual memory?

The way I understand virtual memory is that when an application is not being used for a period of time, the memory being used gets written to disk. When I use an application (netbeans), it seems to be ...
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117 views

Computer suddenly won't detect half the RAM

I have a System76 wilp9 machine running Ubuntu 14.04 which came with 32GB of RAM installed. When I rebooted it today, it displayed a warning that the memory decreased, and now both the bios and linux ...
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524 views

Ubuntu 12.04 LTS vs Ubuntu 14.04 LTS memory usage

My droplet has 512 MB memory and is running Ubuntu 12.04 LTS 64 bits and a Rails 4 application + several workers. It's running well. I tried to deploy the same thing on a Ubuntu 14.04 LTS 64 bits ...
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490 views

Perf samples too long, lowering kernel.perf_event_max_sample rate to

My machine freezes from time to time and I can get it working back by pressing the space key. I have this problem since two weeks now, but it was just once per day max. Now it's starting to be many ...
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60 views

Bsod on 2400 Mhz ram

I recently built a new pc. My pc shuts down randomly and I see a blue screen saying something about "windows has shutdown to prevent damage on itself" the screen only shows for 3 seconds or less, so ...
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41 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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51 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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38 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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936 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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20 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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57 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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213 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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32 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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139 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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342 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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56 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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43 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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59 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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167 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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64 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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439 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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168 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 : ...