0
votes
0answers
21 views

What is the exact difference between the parameters (pgpgin, pswpin) and (pswpout, pgpgout) in /proc/vmstat?

Please note that this question is specific to linux only. And by swap space, I mean the dedicated swap partition. I did google a bit on this, and found these definitions: Paging refers to writing ...
1
vote
0answers
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 ...
0
votes
1answer
105 views

Why does Windows always use as much Virtual Memory as there is RAM installed?

And why does it want to have a maximum of twice as much of that amount? My System has 32GB of RAM and Windows, by default, sets a minimum of 16MB Virtual Memory, allocated 32GB(!) and recommends ...
1
vote
0answers
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 ...
1
vote
3answers
122 views

Do I need Readyboost and page file if I have lots of free RAM?

I have 12 GB RAM installed in my laptop. I have currently both page file and ready boost disabled. Most of the time my RAM usage are under 6 GB. So, I still have 6 GB RAM all the time. Considering ...
0
votes
1answer
40 views

I want to increase the swappiness in my windows 7

as I have 60% RAM usage every time. I have already increased Virtual Memory (Increased Swap Size) but want to increase swappiness too. see my RAM usage:
0
votes
0answers
28 views

Prevent a closed source chosen process from swapping on Windows [duplicate]

When I run VirtualBox If I don't use VirtualBox for some time and then I come back to using it the virtual machine runs very slowly, obliviously all subsequent operation go enough fast. How I can ...
0
votes
0answers
18 views

Why was overlaying suppose to be done by the programmer?

I was reading about OS memory organization, and the first entry in the Virtual Memory(VM) chapter refers to overlaying and how when it was used at a large scale (up to the 60s) the process memory ...
0
votes
0answers
27 views

virtual memory view in windows server 2008

AFAIK, Task Manager in windows 2008 shows the physical memory. I have a program that sums up the FREE physical & FREE virtual memory in MG. How can I confirm it has the right output of this sum? ...
0
votes
1answer
110 views

Windows - How can I flush modified memory?

This is a follow up on my previous question, here: Windows modified memory without a pagefile - Super User I have no pagefile and a lot of modified memory according to resource monitor (Win 7 x64). ...
0
votes
1answer
68 views

Windows modified memory without a pagefile

How does Windows' modified memory work without a pagefile? The physical memory is modified and then...? I'm running Windows 7 with 16GB of RAM and no pagefile. I have about 2.5GB of modified memory, ...
2
votes
2answers
568 views

Why does increasing Virtual Memory not helping game performance? [closed]

My RAM has a pathetic 2GB and most of my applications and background services take up at least 25% to 35% of it and thus causing the game to be laggy and all. I've tried adding virtual memory, from ...
1
vote
1answer
299 views

Changing virtual memory using batch

I am making a program using batch to boost pc performance and I have now come to the stage where I need to edit windows virtual memory to a size that I can change in the code. if needed it can be done ...
-1
votes
5answers
139 views

Why aren't all the disks contents in virtual memory?

For simplification let's only talk about hard disks and RAM. In a nut shell, virtual memory is when "memory addresses used by a program.. [are mapped] into physical addresses in computer memory". By ...
0
votes
1answer
167 views

Turn off single process swap and overcommit

Two questions: Is there some way to turn off swapping for a given process, i.e., is it possible to kill a certain process if it uses all the system's primary memory available? How do I deactivate ...
0
votes
1answer
78 views

Linux virtual memory consumption after parsing log file

I wrote a parser to read the auth.log. For some reason while parsing auth.log I get that VSZ is larger than the total physical memory, which is 2GB. Depending on the size of auth.log and how long ...
0
votes
1answer
1k views

Top command cache vs free memory

When I am running top command (on embedded system with 64 MB RAM) I am getting below description on total memory usage: "Mem: 43468K used, 968K free, 0K shrd, 1280K buff, 21896K cached" It looks ...
-1
votes
2answers
354 views

Why does the Windows Task Manager never show more than 80% memory used?

In the Windows Task Manager I have never seen the memory usage close to 100%. If physical memory is never depleted, how come computers have virtual memory? I realize many years ago maybe computers did ...
1
vote
2answers
133 views

Does a storage HDD need a page file?

I've an HDD used only for storing files (i.e., not used for installing software). Do I need to set a page file for it?
18
votes
4answers
3k views

Why does Linux use a swap partition when the kernel supports paging/virtual memory anyway?

As far as I understand paging and swapping, they're completely different concepts. While swapping means, that a process is either completely in physical memory or on the hard drive, with paging parts ...
0
votes
6answers
3k views

How much RAM will Windows 7 consume or reserve for cache if I install 16 GB of RAM? [closed]

I have a pc with 4 gb of ram. I am thinking of buying 16 gb of ram because it might help windows 7 cache more "stuff" and I would browse stuff faster and maybe it would allow games to cache all data ...
1
vote
2answers
390 views

How does a software like cheat engine work?

I used to think that what cheat engine does is pretty much trivial: going to an address and simply modifying it but I realze now that things are not that simple. Each process has it's own virtual ...
12
votes
5answers
1k views

Increase page file or buy RAM?

I've a 10+ year old XP PC which surprisingly still works however one of the 256MB RAM finally died. Now I am left with just 256MB. As expected the PC became slower however when I tried to increase the ...
3
votes
1answer
1k views

linux: per-process monitor, every 10 minutes, with history access

I really didn't know a better way to ask my question, hence you get a horribly named question. I will explain what i want to do, maybe that will help you help me. I would like to have my linux ...
3
votes
0answers
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 ...
0
votes
2answers
558 views

Empty/dump modified memory to pagefile in windows

I use process hacker to clear out a few gigs of ram before loading large files such as 2GB stack traces so that everything does not freeze up for an hour as stuff gets swapped back and forth. However ...
2
votes
1answer
2k views

Clarification of the difference between PCI memory addressing and I/O addressing?

Could someone please clarify the difference between memory and I/O addresses on the PCI/PCIe bus? I understand that I/O addresses are 32-bit, limited to the range 0 to 4GB, and do not map onto system ...
8
votes
2answers
4k views

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 ...
0
votes
1answer
89 views

Fastest storage for virtual memory

I want to know which is the fastest storage medium like hd, fd, sd card.... to be used as virtual memory as my RAM is only 1GB and I didn`t want to spend too much on purchasing a new one.
4
votes
2answers
555 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 ...
0
votes
1answer
346 views

Page pool and cache memory

It is subtly mentioned on this article, that the page- and non-page pool, are used for contiguous memory allocations which are sub-page size. It then goes on to list the differences. I am not sure ...
3
votes
2answers
159 views

Virtual Memory is confusing me

My computer is like completely out of virtual memory. Granted I'm multitasking quite a bit, but I have 4gb of RAM which I just yesterday upgraded to from 2gb. On the performance tab of task manager ...
8
votes
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?
2
votes
2answers
1k views

Virtual memory vs. Virtual address space

I know virtual memory is a paging file that computer uses to store a part of RAM on hard disk for a running process. But how different is Virtual address space? is it the RAM or hard disk or both?
2
votes
2answers
9k views

what differences and relations are between logical and virtual memory?

I was wondering what differences and relations are between logical and virtual memory? How do their purposes differ? Are the relations and differences the same for logical and virtual addresses?
2
votes
1answer
2k views

Windows 7 virtual memory size

I have computer with 4GB RAM running windows 7 64 bit edition. I have set paging file size 8000MB( both initial size and maximum size) according this document, but after restart I'm seeing only 4GB ...
1
vote
2answers
104 views

Is it true to say that once I quit a process, the RAM used is immediately reclaimed?

I'm running Windows Vista Home Premium SP2 32-bit. Is it true to say that once I quit a process (Task Manager > Processes tab), the RAM used is immediately reclaimed?
1
vote
2answers
657 views

On Linux there is a 3GB/1GB kernel option. How do I do this in Windows 7 32-bit?

I have 4GB RAM installed. PAE is off. How do I tell the Windows 7 32-bit kernel to allocate 3GB virtual paging area to user mode and only 1GB to kernel space?
2
votes
2answers
677 views

ulimit broke my server

I ran "ulimit -v 75" to get SBCL working, and now nothing will run on my server. $ sbcl Killed $ vi Killed $ man ulimit Killed $ ulimit -v 256 -bash: ulimit: virtual memory: cannot modify limit: ...
0
votes
1answer
97 views

Is that true that Windows can eventually address executable files as if they were parts of virtual memory?

I've once read somewhere that Windows can treat programs' executables and DLL files as parts of swap file rather than duplicating their content into pagefile.sys when swapping them out of physical ...
-3
votes
1answer
187 views

What is Virtual Memory? [closed]

I would like to know what you guys think Virtual Memory is . Also Could you explain to me how the development of Virtual Memory has impacted operating systems and the personal computer.
0
votes
2answers
483 views

sizes of RAM, of virtual memory and of swap for 32-bit OS

If I understand correctly, a 32-bit OS (Ubuntu) can only address 4GiB memory, so RAM with size larger than 4Gib will only be used 4Gib of itself and the rest is a waste. I am now confused about this ...
1
vote
4answers
1k views

Force a process to run in virtual memory? Ubuntu

I am running a series of tests for an implementation of a remote pager that sends page faults to other computers in a network. Long story short, I was wondering if there is an easy way to force a ...
0
votes
3answers
6k views

Can Windows 7 pagefile be turned off if 4GB of hi-speed RAM present? [duplicate]

Possible Duplicate: Any reason not to disable the Windows pagefile given enough physical RAM? I believe that there is enough of memory for everything used at the moment to be stored and ...
4
votes
1answer
306 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 ...
0
votes
1answer
702 views

System thinks it is swapping, but isn't

I have a linux server (Ubuntu 10.04) which has no swap space (swapon -l reports nothing, 0kb swap memory listed in /proc/meminfo). The beginning of the output of top (sorted by %mem) is reproduced ...
0
votes
1answer
2k views

Can I disable virtual memory? [duplicate]

Possible Duplicate: Do I still need to use virtual memory? Suppose I have a system with 8 gigs of RAM. I have used systems with less than that including physical RAM and virtual memory. ...
2
votes
2answers
634 views

Make JVM use Virtual Memory only after using 1GB of RAM

Id like to run a memory intensive java program and limit how much physical memory it can use. Is possible to configure the JVM to use no more than 1gb of RAM, and use only virtual memory after it ...
1
vote
2answers
500 views

What is commit charge?

Wikipedia says In computing, commit charge is a term used in Microsoft Windows operating systems to describe the total amount of virtual address space for which the backing store is the ...
2
votes
1answer
2k views

Identify an instance of Google Chrome by PID

While working I generally need around 40 windows open at a time and run 100-200 processes. When memory constraints become an issue, I start picking off the processes that are the most resource ...