The memory-management tag has no wiki summary.
37
votes
4answers
16k views
How to disable Mac OS X from using swap when there still is “Inactive” memory?
A common phenomena in my day to day usage (and several other's according to various posts throughout the internet) of OS X, the system seems to become slow whenever there is no more "Free" memory ...
15
votes
4answers
908 views
Is killing a process still considered bad for memory management?
So I am having a little discussion with my boss about memory management.
I've been told that killing a process does not allow it to deallocate memory. Is that still the case, or was that years ago?
...
8
votes
3answers
5k views
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 ...
7
votes
1answer
2k views
Wired Memory vs. Active Memory in OS X
I'm having trouble understanding the difference between Wired Memory and Active Memory in OS X.
Do not talk about the four types of memory (don't talk about free or inactive memory, because I ...
6
votes
6answers
6k views
Where exactly L1, L2 and L3 Caches located in computer?
Where exactly L1, L2 and L3 Caches Located in computer ?
I know, we use Cache to increase performance by picking DATA and INSTRUCTIONS from Cache rather than Main Memory.
Following are my questions
...
5
votes
2answers
8k views
How to setup Windows 7 to effectively use 24GB RAM
I need to know the best strategy to let Windows 7 use 24GB RAM in the most effective way, so it does as few reads from disk drive as possible.
I once read there is some setting in Windows but I can't ...
5
votes
3answers
359 views
How to know which program or service take long time at and after PC Starting?
I want to tell which program consume and take my PC resources at the windows7 start up and after i log-in.
Because after i log in my HDD led still working for almost 5 minutes.
So i want to know ...
5
votes
3answers
630 views
Windows x86 physical memory is 24-bit?
I am reading the new book, Windows Internals 5 about memory management (chapter 9 in Physical Address Extension PAE section). It is mentioned "A 32-bit system represents physical addresses internally ...
5
votes
1answer
133 views
Prevent important OS X process being swapped out, without code change?
I want hotkey-based utilities like Quicksilver or Zooom to respond immediately. But if they have been idle for a while, they (I guess) get swapped out, and respond slowly, sometimes not even ...
4
votes
1answer
240 views
Why RAM usage is much bigger than Virtual Memory usage
I am running some tests on a very powerful machine ( 24GB RAM, Window 2008 64bit )
I checked my task manager: Physical memory: 98% ( RAM is 24GB )
But the totally "Memory(Private working set)" usage ...
4
votes
1answer
1k views
How do I limit the memory usage of a specific process in linux?
I've written a program for a class that my professor will be testing in various low memory environments to see how it behaves when the program runs out of memory. Is there a way I can simulate the ...
4
votes
1answer
1k views
Why does limiting my virtual memory to 512MB with ulimit -v crash the JVM?
I am trying to enforce maximum memory a program can consume on a Unix system. I thought ulimit -v should do the trick. Here is a sample Java program I have written for testing :
import java.util.*;
...
3
votes
2answers
98 views
About memory cache of Linux
I'm running a python script to do some statistics and the actually memory which used is low,about 10%.And no other process cost more memory.However,when i use free -m and it shows that almost 95% ...
3
votes
1answer
603 views
How to show memory usage in Netbeans?
I would like to know if there is an option in Netbeans (v. 6.9) to show its memory usage.
For example, how much got allocated to it and how much it has used.
3
votes
3answers
996 views
Detecting source of memory usage on a Linux box
I have a toy Linux box with 256mb RAM running Ubuntu 10.04.1 LTS. Here is the output of free -m:
total used free shared buffers cached
Mem: 245 ...
3
votes
4answers
6k views
How could I limit or even disable file cache on Windows Server 2008R2?
There is a machine, with a very fast RAID array, and a fast internet connection. But, it only got 8gb of mem, which runs out really quick, when the upload goes up.
Any ideas how could I disable, or ...
3
votes
2answers
254 views
Atomic operation. How does it guarantee consistency from hardware perspective?
Atomic operation. How does it guarantee consistency from hardware perspective ? How is it implemented in HW ?
As far as I know, atomic instruction makes sure that when it is executed, no other ...
3
votes
1answer
161 views
Windows equivalent for “cat /proc/iomem”
Is there an equivalent program for Windows that "cat /proc/iomem" gives you under Linux?
I'd like an easy way to read the Windows memory map.
3
votes
3answers
2k views
Preloading programs and files into ram? (Windows 7)
Now that I have 12 gigs of ram in my PC I'd like to make the most of it and minimize the disk access of the application/game I'm using while I use it so I'm wondering if there are some ways to preload ...
2
votes
4answers
163 views
What could cause a computer to slow down over time?
I have an application/game that ran smoothly a few months ago but lately I've realized it runs more sluggish than usual (the frames per second get quite low).
I thought maybe something I installed is ...
2
votes
4answers
149 views
Can I track down what is consuming more and more memory on Windows XP?
I use XP at work and if I don't restart every day the system gradually uses more and more memory with roughly the same processes running. I use Windows 7 at home and I don't experience the same ...
2
votes
4answers
683 views
Firefox Tab Recycling
I have a somewhat academical question. When using Firefox, would it be better for memory usage if, when going to a website, with an unused tab available, I:
Close that tab, then open a new one with ...
2
votes
2answers
831 views
Memory management (segmentation and paging) in 80286 and 80386: How does it work?
I found lots of Web sites and books explaining how memory management worked on the 8086 and later x86 CPUs in Real Mode. I understand, I think, how two 16 bit values, segment address and offset are ...
2
votes
3answers
885 views
What is my peak total memory usage? How much of my RAM is actually being actively used?
Is there an app or utility in Windows that shows me the peak value of in-use memory (i.e., the total of the shareable and private memory of processes, drivers and the operating system) (not standby ...
2
votes
1answer
482 views
Making full use of memory on graphic cards
Onboard graphics cards often reserve some of the system main memory for their own use.
For a computer with a separate graphics card which has its own memory, is this possible that some of it be ...
2
votes
2answers
3k views
How do I resolve BSOD: PAGE_FAULT_IN_NONPAGED_AREA?
I have been trouble shooting this for a few days and cannot fix this anyhow.
Computer specifications
Mobo: ASUS Sabertooth X58 LGA 1366 Intel X58 SATA 6Gb/s USB 3.0 ATX Intel Motherboard
CPU: ...
2
votes
1answer
2k views
Swaping, Paging, Segmentation, and Virtual memory on x86 PM architecture
Well, this may seem a common or already asked question but after searching various books, online tutorials and even here on SU, I am still puzzled at how these four beasts work together on a x86 ...
2
votes
2answers
847 views
Is it possible to make the OOM killer intervent earlier?
I try to tweak my development system to maximal reliability. I disabled swap, because for GUI usage it mostly renders the machine unresponsive in such a way not useable anymore. Nevertheless, if ...
2
votes
2answers
34 views
8 or 12 gb when dealing with mat
I had a huge problem with my computer BSODying all the time and all the times it seemed to be a memory problem. I have 16 gb RAM (4*4) and checked each of my modules individually with memtest86 and ...
2
votes
1answer
75 views
What resource am I lacking? Causes notepad to be missing menu, or programs to not open
At this point when a notepad window is like that with no menu, I can't open another notepad either.
After closing one or a few cmd prompts. Or after closing an add/remove programs window, or a ...
2
votes
2answers
626 views
Why do different du versions report different file sizes?
at our organization we have a windows file server, which I use to store a large number of files. This file server is mounted using smbmount on 2 clusters.
Cluster A runs CentOS 4.8, and du version ...
2
votes
2answers
783 views
What is Paging in memory management?
I was just reading Operating System Principles by Silberschatz et al when I came across paging in memory management.I'm slightly confused about it.
It states that Physical Memory(I assume it's RAM) is ...
2
votes
1answer
316 views
How can I configure Firefox to assume I have less memory?
Firefox has a few different settings that automatically get tuned based on the system ram. This is all great if you're running nothing besides Firefox, but when you're running half a dozen apps at the ...
2
votes
1answer
178 views
Java: compile and run hanging at command prompt
I'm having an issue that I'm hoping someone can help with. I'm working on netbook running WinXP Pro SP3, 1.6GHz & 1GB of RAM. I've got a relatively simple java program that I'm able to ...
2
votes
1answer
1k views
Windows XP only uses 2 GB of my physical 3 GB RAM
At work we still have to use Windows XP 32bit. Slowly we're getting to Windows 7 but for now I'm stuck with Windows XP.
My problem is that Windows XP uses only 2 maybe 2.1GB of ram from my physical ...
2
votes
1answer
687 views
RAM is showing 2.99 GB instead of 3.25 GB in Windows XP Professional 32-bit [duplicate]
Possible Duplicate:
Why does Windows only show about 3.5GB of my 4GB+ of RAM?
I have an Intel Core 2 Duo CPU E6550 with 4 GB of RAM. At that time, the system properties was showing RAM info ...
1
vote
4answers
915 views
Upgraded RAM Leading to Memory(?) Issues In Windows 7
I was super excited to upgrade my computer from 4GB to 8GB, so much so, I made a pretty amateur mistake: I swapped out the memory while my computer was asleep, and not shut down. Now, I'm not sure ...
1
vote
1answer
85 views
Sharing RAM/G5 Desktop/iMac [closed]
I have a Mac G5 Desktop with 14GB of RAM installed which I sometimes use as a start up disk. I have a 27" iMac 2.8GHz Core i5 with only 4GB of RAM installed. Is there anyway I can access/utilise the ...
1
vote
3answers
308 views
New Memory Power Management options in Power Options?
These options are listed under Memory Power Management in the Power Options on my laptop:
Backoff channel heat break tolerance
Consecutive time units to mark a page as cold
Backoff channel heat ...
1
vote
3answers
113 views
Resources of minimized programs in Linux
When a program is minimized to the taskbar in Linux does it use less resources?
1
vote
2answers
270 views
PC multi-core architecture, scheduling of cores access to system memory
My office computer has 8 cores. I recently upgraded the system from 4Gb of RAM (in two modules) to 24Gb of RAM (in six modules) and noticed a considerable increase in performance when multiple cores ...
1
vote
1answer
914 views
Mac OS X consumes so much memory
I use a Mac for software development. It has 4GB of RAM (cannot be upgraded), and when I power it on, without any programs run by me, it consumes 2GB of memory. I develop a Rails app and the server ...
1
vote
1answer
2k views
NTFS Partition gets auto-corrupt, becomes RAW and unreadable
I have dual boot on my machine: Windows 8 and Ubuntu 11.10.
Suddenly, one of my partitions went corrupt.
On Windows, it's showing this error.
Location is not available.
E:/ is not ...
1
vote
3answers
53 views
Windows 8 and memory consumption [closed]
My current system should have enough memory (4GB), but it's the lower average right now and if I want to run multiple applications at once - which is needed - memory is getting scarce.
In addition to ...
1
vote
1answer
114 views
Limit the number of inboxes loaded in Thunderbird to save memory? [closed]
I have 3 email accounts I use in Thunderbird, however I only use one of them on a regular basis.
Is it possible to selectively load accounts in Thunderbird to save memory?
Here is the ...
1
vote
1answer
186 views
A profile makes mozilla firefox killed. How to repair?
Mozilla firefox fills system memory and gets killed during startup if I use my "default" profile, even when started in safe mode. I'm using Kubuntu Linux.
$ firefox -safe-mode
Killed
$
Upgrading ...
1
vote
2answers
4k views
What's the advantage of 'hardware reserved' RAM?
I have Windows 7 64-bit, 8GB RAM and 1152MB is hardware reserved. This leaves me with 7039MB of physical memory available as I can see on the Task Manager. What are the advantages or disadvantages of ...
1
vote
1answer
215 views
Two Firefox windows vs two browsers? Ram Consumption
I don't know enough about Ram & sharing to know what the difference is here.
Normally, I run Chrome in one desktop for personal use, and Firefox on a second desktop for business. I like the ...
1
vote
0answers
42 views
SQL Server Continues to Swap RAM After Using a Virtual Machine
I have a dev computer running Windows Server 2008 R2 Enterprise and SQL Server 2008 R2 Enterprise, with 8GB of RAM. As I write code and use the database, SQL Server will use more-and-more RAM (which ...
1
vote
2answers
129 views
Best Settings for Windows 7 PC with lots of memory and CPU [closed]
I have a PC with Windows 7 Ultimate (64Bit) with 24 GB of ram and Intel i7 X980 (6 Cores).
I would like to know, what are best settings/tweaks I should have for faster performance and efficient ...
