Swap space is a virtual memory of RAM. It is used when the amount of RAM is full. Swap space can be a dedicated swap partition, a swap file, or a combination of swap partitions and swap files.

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Should I symlink my /private/var/vm dir to another volume in OS X Lion?

So I just installed an SSD in my MBP and have been a bit concerned about running out of disk space. I noticed that /private/var/vm holds an 8.6 gb sleepimage file as well as swap files. I'd be much ...
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2k views

Moving Swapfile in Mac OS X Lion

I had previously consulted this thread when using snow leopard to move all swap to an SSD: Moving the swapfiles to a dedicated partition in Snow Leopard The information appears to be out of date at ...
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53 views

Windows 8.1: Is there a way to find out how much swap space is currently being used?

Not the size of the file on the disk. Older versions of Windows used to have "%pagefile in use" in the Performance Monitor. Thanks. UPDATE: In turns out Windows 8.1 still includes the Performance ...
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481 views

OS X “Swap used”

I'm a bit confused here, I'm trying to open a tab in Chrome and sometimes it takes few seconds while freezing my computer significantly so that I can't use even to bring Dock menu... I even closed ...
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699 views

My Ubuntu laptop swap cache to disk freeze my system

My laptop is Thinkpad x220, 4G ram, harddisk is 7200rpm, installed with Ubuntu 12.04, using Unity desktop. When I open eclipse and chrome, they eat about 2G memory. Here is the free -m result: ...
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75 views

When memory is swapped to disk, and later RAM is freed, does the memory get swapped back into RAM?

I'm guessing the answer depends on the OS. In this case, it is VMware ESXi. I created a low memory condition by migrating several VM's to a host that has memory over-committed. Once page sharing and ...
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1answer
74 views

Windows obstinately shrinking the pagefile

I admit I have rather small free space available on my C:\ drive (only 3-4 GiBs usually, with a 4 GiB pagefile being around), but what really annoys me is this: Windows sometimes does an operation(1) ...
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52 views

GRUB recreate a partition before booting a certain OS

I am having a problem of managing the swap areas on my hard drive. Side story: Due to having only a few GiBs free on my C:\ partition, Windows regularly shrinks the pagefile (even though it ...
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1k views

Can't enable swapping in mac os x 10.8.3

some time ago a disabled swap. I need to enable it now and i was not managed to do it with help of sudo launchctl load -wF /System/Library/LaunchDaemons/com.apple.dynamic_pager.plist & reboot ...
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1answer
299 views

On Centos 6.3, why do several swap measuring methods return different results?

I have a production system running centos 6.3 with 96 Gb RAM and swap of 2 Gb. The intention is that there is enough RAM on the box so that no processes should get swapped. Over the last week or so ...
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234 views

Linux swap position on hdd

As far as I know hard drives are faster at the beginning of the disk. If this is true, why does Ubuntu put the swap partition to the back of the disk by default?
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25 views

Disable swapping out of readonly pages etc. on linux?

Is there any way to prevent Linux from ever swapping out anything but rather go right to the OOM killer if it runs out of physical RAM? Background I have a Linux workstation that every once in a ...
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201 views

How to swap Fn and Ctrl keys on Lenovo L540

I recently got a new computer and the Fn/Ctrl keys are driving me crazy. Can anyone tell me the proper way to swap Function Fn and Control Ctrl keys on Lenovo L540?
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1answer
405 views

why do i get swapping even if i set vm.swappiness to 0?

I have a couple centos 6.5 x64 servers with 64GB ram running lots of kvm vps's. some of these servers have no swap usage at all and some do. I've set swappiness to zero. However some still swap even ...
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1answer
25 views

How to get data shown out of workspace or directly from application?

I'm a new user, because until this moment I used to handle with everything by myself. My problem is complex so I think I chose the right section. Because of some reason I had to use another web ...
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1answer
104 views

Swap size LIMITED to RAM size

I've created a swap file of 4.3GB. Made it a swap file with mkswap and then mounted it at boot. Now... if I have done a free -m of my system I got: total used free ...
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1answer
821 views

How to see whats eating my swap space on linux

I have a unique situation here where a Java app I wrote is choking when it forks and creates some child processes. According to the error logs I'm seeing there is a java.lang.UNIXProcess method ...
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1answer
373 views

How can I restore a partition to its former NTFS file system?

While installing Ubuntu 11.04 I was asked to choose a swap area for better performances, so I chose my 1T hard drive(which had only one partition). The problem is that I did not know it will use the ...
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1answer
436 views

Installing Windows 7 onto a Raid 5 setup without an install disk. Can it be done?

I am upgrading my motherboard from a crappy dell prefab to a Foxconn Inferno Katana. I am also upgrading my ram from crappy stock dell ram to G.Skill. I have decided to set up a raid system, now ...
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1answer
193 views

Is it possible to swap two styles in Microsoft Word or modify the document map?

I've been writing a document in Microsoft Word and have been using the default Title style as my main heading for each section and Heading 1 for my sub-sections. However Word uses Heading 1 as the ...
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1answer
644 views

Made the USB Drive as Swap Partition, Installed it, How to undo it{Ubuntu 10.10}

Well,it was a very stupid thing to do on my part, But I made a 500 GB USB connected Hard Disk as my swap partition (thinking it will be only used during installation) and installed Ubuntu10.10. I ...
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517 views

set up permanent ramdisk in ubuntu to not using ram when is the ramdisk empty

My laptop running Ubuntu 12.04 has 8GB RAM. I added following record to /etc/fstab tmpfs /media/ramdisk tmpfs defaults,noatime,mode=1777 0 0 What exactly does it mean? I have tested that I can ...
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1answer
119 views

RamFS over sshFS as swapspace

Guys I have to computers at office, boxA - 256mb RD-ram with decent cpu boxB - 1.5 gigs of ram with terrible cpu Network cards are 10/100 I plan to sshfs into boxB and mount a ramfs of boxB as ...
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156 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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59 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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57 views

possibility of swap space has larger data in it than in my physical memory

Quoting the Deployment Guide from centos.org that is, Swap space in Linux is used when the amount of physical memory (RAM) is full. And that Wikipedia also said that, the term "swap" [is ...
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319 views

Can't move OS X swap file to another folder, it keeps being recreated

So I followed these instructions to the letter ---> Moving the swapfiles to a dedicated partition in Snow Leopard But for some reason, the swap files keep being regenerated in the same folder. I've ...
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2k views

How change linux swap disk priority permanently

I'm using two swap disks. Changing the order they are in in /etc/fstab and using "pri" in fstab doesn't have any effect. This is what it looks like /etc/fstab #swap on other disk ...
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356 views

improving swapping strategy

I'm finding linux's swapping strategy to be somewhat less than ideal. In general I have a ton of processes running, maybe 40 or more big ones, and only end up using a few regularly. Nonetheless, I ...
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236 views

swapping or trashing with vast amounts of unmapped pagecache

I'm using kubuntu jaunty (i386 32bit), kernel 2.6.28-13-generic. I've 4Gb of RAM, of which only 3317Mb are seen by the system (I guess because of the 32bit system). I'm seeing that the pagecache ...
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25 views

Win8.1 Bad Virtual Memory Managment?

For the last couple weeks I'm facing a serious problem with my Win 8.1 32bit (64x CPU) 4G RAM, having "System Managed size" setting for virtual memory (then win allocates 1.8G), minimizing even light ...
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17 views

Place specific programs in virtual memory / swap memory

I was just curious if it was possible to identify programs that I want to be swapped and others that I want to keep in ram. For example, I've realized that Chrome sometimes takes up to 2GB of RAM and ...
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17 views

swap\pagefile of 2 levels

Lets assume I want to assign 2GB to swap(linux)/pagefile(windows) on SSD, and 16GB more on HDD. Is that possible to use the space on SSD as level 1 of virtual memory, and the space on HDD as level 2 ? ...
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82 views

Mavericks isn't compressing memory

Specs: Mac OS X 10.9.5 | Macbook Pro Mid-2012 15" | 4GB RAM So recently I've been driving my machine to the limit with lots of bioinformatics work and didn't give it much rest. This afternoon it said ...
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59 views

Ubuntu swap not mounted half of the time

I have about 8 different ubuntu systems using different versions of ubuntu/lubuntu/kubuntu/mythbuntu/etc. Some are physical machines, some are virtual. The issue I always have is that upon booting up, ...
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21 views

Know which is the biggest matrix that can be computed in MATLAB

I mainly use MATLAB for solving linear problems such as Ax = b and the eigenvalue eig/eigs one. I noticed in my current configuration (OS X, i7 2,3GHz, 16GB RAM) that I can compute without using swap ...
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239 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 ...
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78 views

Linux Has Become Very Slow Dealing With Large Data

Last year I bought a computer, for around $1,800, so it is relatively high-end. When I first got it I was particularly pleased at how quick it dealt with large MySQL queries, imports and exports. But ...
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41 views

Does zswap compress pages, that written to swap device?

Does zswap compress pages, that written to swap device? Is it eligible to reduce swap IO?
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134 views

OS-X how do I figure out is my swap file is enabled?

This may be a strange case, but I used to enable and disable my swap file depending on which apps I wanted to run. (I found that disabling the swap file when I would run Parallels made a difference. ...
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76 views

Forcing suspended jobs to swap all memory in Ubuntu

Is is possible to suspend a job and force all of its memory to swap? I've got six jobs running, and they're competing with each other for resources. So much gets wasted on system swapping that they ...