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

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Why does the memory usage in “top” not add up?

I have noticed that sometimes when I run top, the memory usage of each process in the process table does not seem to add up to the total. For example, in the dump below, top says that I am using 16 ...
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4answers
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Windows 7 100% Memory Usage (without any process listed as using that much memory)

When I plug my external USB 2TB hard drive into my windows 7 box, my RAM usage climbs up to all 4 Gigs (but in task manager it shows that all process are small) and the hard drive is churning like ...
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7answers
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Running Windows with defective RAM

Is it possible to run Windows (7, x64) with a defective RAM module? More precisely, is there some way to tell Windows not to allocate a known bad address or block of addresses? For Linux, there is ...
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4answers
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Releasing swap space

At times the kernel seems to be intent on keeping e.g. firefox in swap, even though there is enough physical memory available and I'm using firefox: robert@rm:~> free -m total ...
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2answers
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Will 8GB RAM stick work if my motherboard has limit of 16GB (for 4 slots)?

This one is quite tricky and I can't find any decent information source/documentation. I have Gigabyte motherboard from 2008: Gigabyte MA770T-UD3P rev. 1.0. It has 4 RAM slots and total limit of ...
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4answers
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How can I get my 64-bit computer to recognize all of my RAM

I've recently upgraded my system from 6GB of RAM to 12GB. Once I installed the new RAM, Windows 7 shows in my System Information that I have "12.0 GB installed (7.99 GB usable)". Although less common, ...
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10answers
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8GB RAM on XP Professional [duplicate]

I recently installed 8GB of RAM onto a quad core workstation (HP xw8600) running Windows XP Pro (32-bit). I added the /PAE switch in the boot.ini file, but the SysInfo is saying 3GB total memory ...
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5answers
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64 Bit OS and RAM

How much RAM can a 64-bit Windows 8 Ultimate Operating System use? I have read on the Microsoft website that you can place up to 512 gigabytes (GB), but to my understanding, I thought 64-bit implies ...
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3GB RAM Installed and Detected by BIOS, Windows Vista 32bit Only Sees 2GB

I am attempting to install more RAM on a Windows Vista 32bit machine which is using a X6DAL-XG motherboard and the RAM amount reported in the BIOS is 3GB+, but Windows is only reporting 2GB installed. ...
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What are these different kinds of memory usage in Windows 7 task manager?

In Windows 7's task manager, I can select different columns to show. There are a bunch that are related to memory and memory usage, but I'm not sure what it all means. I have a Dutch installation of ...
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How do I interpret the specification of memory (RAM)?

When looking at memory there are a few specifications that I don't understand and was hoping to have clarification on. What do these terms mean, and how do they affect the systems performance? Feel ...
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98-100% memory use, no process uses more than 25MB

I am having intermittent issues with my gaming computer. Sometimes, while playing Battlefield 3 (only 2 times the problem has occured), my memory usage goes to 100% of my 16GB machine. I close down ...
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6answers
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How do I make Windows 7 less aggressive in caching memory?

I've noted recently that Windows 7 on my machine has been complaining about running out of memory and that I should close some programs. It would then usually point out a program I have running that ...
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3answers
19k views

What is Performance Monitor telling me when my page faults / second are high?

I have a Windows 7 64-bit computer that is having performance issues. After some investigation, I have discovered that the page faults / second on it - as reported by Performance Monitor - are really ...
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2answers
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I've got RAM everywhere. How do I identify it?

I've pulled RAM from a bunch of old PCs and I'm ready to find the largest modules to reuse. Most of it is just SDRAM but some of it doesn't have any identifiable markings that might explain it's ...
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2answers
295 views

How to “swap in” again memory from page file to physical memory in Windows at once (like linux swap-off)

Is there a way to swap back in (to put back all the memory data that was put into the page file (or swap, whatever you prefer)) memory on a windows PC? On linux, one can easily do this with the ...
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3answers
1k views

Web browser memory usage

How come web browsers are so heavy in memory? I have Firefox opened with two tabs, and it takes over 800 MB of RAM, Chrome with four tabs takes over 1.2 GB! I mean, what's up with consuming ...
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3answers
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How to findout which firefox tab is using most CPU or memory?

There are times when the firefox responds reluctantly. And it is not only when i have opened many tabs. But there are cases when i have opened as many as 20 tabs and firefox is working fine and there ...
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1answer
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Is this RAM usage normal (huge non-paged pool)?

I bought an ultrabook today. It boots extremely quickly and everything, so obviously some sophisticated techniques are involved, but I'm confused because task manager shows over 80% RAM usage when I'm ...
9
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1answer
343 views

increase desktop responsiveness on linux while swapping

All GNU/Linux distributions I tested so far have the problem that whenever the ram gets filled and the system begins swapping, the whole desktop and graphical user interface becomes unresponsive as ...
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6answers
418 views

Just Dropped A RAM Inside Plastic Casing - Is it Dead?

I just dropped some laptop-sized RAM while it was in it's plastic wrapping onto my keyboard of my laptop. What's the chances of it failing because of this drop? If the RAM fails, would the failure ...
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3answers
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Why not use SSD space as RAM?

I am new to the hardware side of things. I run a few machines which have 400GB+ SSD's and 32GB RAM. I have been thinking about going up to 64GB RAM, however, I was thinking, since SSD's are ...
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How to enable 4GB in my Windows 7 64 bit?

I have the following machine configuration: Intel Core 2 Duo E6300 1 x 2048 MBytes memory chip 2 x 1024 MBytes memory chip 1 x Radeon HD 4870 Motherboard : Gigabyte 945P-S3 Windows 7 RTM 64-bit In ...
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2answers
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Is a DDR3 MB compatible with DDR2 RAM?

If a motherboard's specifications say it supports DDR3 SDRAM sticks, would I be correct to assume it is also compatible with DDR2 RAM? Am I wrong, or does it depend on the motherboard?
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Windows 7 using exactly HALF the installed memory

I've taken this directly from system information: Installed Physical Memory (RAM) 4.00 GB Total Physical Memory 2.00 GB Available Physical Memory 434 MB Total Virtual Memory 5.10 GB Available ...
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7answers
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Will adding more RAM speed up my computer?

Apparently, you can speed up your computer by adding more RAM. Is the amount of ram to be added is directly or indirectly related to the amount of hard-disk space, processor speed, Motherboard etc... ...
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3answers
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Why does my 32bit ubuntu see 8GB of RAM?

I have just installed a fresh copy of ubuntu 11.04 32 bit and I was surprised to see that the OS can see my 8GB of RAM not like Windows 32 bit OS. How does it work? How is the address mapping ...
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3answers
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Is there a command to find out the available memory in Windows?

I am looking for a command that returns the available physical memory in Windows. I tried "systeminfo" but it takes too long and returns a lot of unnessesary information for me. If there is not any ...
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6answers
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How does Motherboard and CPU affect RAM choice?

I am seeking advice on which memory to use with my motherboard and CPU. Below are my components and some relevant information extracted from their official websites. NOTE: Although this is a very ...
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4answers
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In Windows 7, is there a way to know how much memory a service is using?

In windows 7, is there a way (by using common interface or a custom utility) to know how much memory a specific windows service is using ? It seems most services are hosted by svchost.exe processes ...
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4answers
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Installed memory 4GB but only 1.93 GB is usable shows in system properties dialog?

In my Intel Core i5 2.80 GHz CPU , DH55HC series Intel mother board machine installed with windows 7 64 bit machine, when I right click my computer and see system properties I see that "Installed ...
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2answers
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Can I use faster DDR3 RAM than my motherboard allows?

My motherboard states it supports DDR3 1066/1333. Can I purchase DDR3 1600 and expect my system to drop it down to the highest level the motherboard supports? Will this change the Cas Latency or ...
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3answers
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Can I launch a Windows exe with a simulated reduced amount of RAM?

I have an older application that crashes on launch on a Windows 7-64 bit machine. The root cause, according to the internets, is apparently I have too much memory and the app has some bug when it ...
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3answers
248 views

Is a computer's DRAM size not as important once we get a Solid State Drive?

I am thinking of getting a Dell X11 netbook, and it can go up to 8GB of DRAM, together with a 256GB Solid State Drive. So in that case, it can handle quite a bit of Virtual PC running Linux, and Win ...
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6answers
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4.00GB (3.25GB usable) in Windows 7 x64

I have set up Windows 7 Ultimate 64-bit on my PC. I have 4GB RAM and my BIOS states the correct amount (4096MB), but Windows (System Manager) says I have 4.00GB (3.25GB usable). This seems to be a ...
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3answers
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Only 3.2GB of 4GB RAM detected on 64-bit Debian

I'm running Debian Squeeze (x64): # uname -srvmo Linux 2.6.32-5-amd64 #1 SMP Mon Jan 16 16:22:28 UTC 2012 x86_64 GNU/Linux I have 2 compatible 2 GB sticks of DDR2 in my G31M-S motherboard. It ...
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11answers
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Is it possible to limit the memory an application is allowed to use?

I've used tools to effectively reduce the amount of RAM available to all applications, but is there something to do the same on a per application basis? Specifically, I'm looking to limit the memory ...
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2answers
533 views

Why is my swap used even if my physical RAM isn't full?

Sometimes I have observed in Ubuntu's System Manager that without the physical RAM being used completely, the swap memory starts getting used. Why is it so?
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3answers
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What's using my swap (Ubuntu)?

I have an Ubuntu 8.04 server which is running a database and a bunch of Java application servers. Its memory configuration and usage is: total used free shared buffers ...
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2answers
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Will Mac RAM work on a PC?

I have some Mac RAM at school that is not being used. It has never been opened before, and one of the PC's needs a little extra. Will putting Mac RAM in be an issue? The RAM also is not labelled, how ...
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1answer
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Which files are cached by linux?

I understand that linux uses unused RAM to keep some files cached. But I wonder, which files it actually caches! If you take a look at free : Gesamt Belegt Frei Gemeinsam Puffer Cached Speicher: ...
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2answers
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How to get results from Memory Diagnostics Tool?

I ran the Memory Diagnostics Tool in Windows 7 64 bit. I have 16G RAM. It reported hardware problems. This is a new system with new memory. When the system rebooted I was expecting an icon in the task ...
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1answer
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How does RAM frequency and latency differ? How does it affect performance?

I have a question regarding two specifications of RAM memory, the amount of Mhz and the latency timings (example: 9-9-9-24). Which one of the two is most important for system performance and why? ...
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2answers
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Commit charge is 100% full but physical memory is just 60% when using no page file

I have disabled the page file in my system (hard disk is too slow, cannot buy a new one right away, cannot move page file to another partition). When I see into Resource Monitor, using memory ...
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2answers
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How can I limit the number of child processes that MySQL spawns?

Is there a way to limit the number of children than mysqld spawns? Or should one not worry about that? My VPS only has 512MB of RAM. Here's the output of htop, after I set max_connections to 6 and ...
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Getting gratuitous amounts of soft page faults when loading games and watching flash video

My computer has a strange issue when playing games that load assets on the fly. Perhaps I'm looking in the wrong places, but I seem to be unable to find anyone with a similar issue. In case it's not ...
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1answer
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Performance of Multiple RAM Sticks Compared to Single Sticks

It's no secret that using two physical drives gives better performance than two partitions on the same physical drive; because there are two devices, they each have their own platters, head, caches, ...
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4answers
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Why can't graphics cards just have more memory?

Something I never understood, why do graphics cards usually have small amounts of memory on them? I know memory isn't everything, but surely it's pretty cheap just to load 4gb of memory on any old ...
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6answers
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What is the relationship between CPU usage and RAM?

I have seen many times that my CPU usage is 100% and my RAM is only occupied for about 50%. What is the relationship between these two? How does one's performance affects the other?
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Windows 7 x64 - How can I test my memory?

People tell me that my computer may have some bad RAM. Is there a way to test it without special equipment?