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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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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493 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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910 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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61 views

vim leaves a swapfile after crash with unknown owner

I am running Cygwin on windows. Several times now I've had a swap file left behind from vim after a crash, but it can't be recovered or deleted. "ls -l" shows this: -rw-r----- 1 Unknown+User ...
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128 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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60 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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2k 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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362 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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258 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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38 views

How to tweak Windows swapping priority (if there is some?)

Sometimes I open a program that allocates too much memory - i.e. computer has 0.5 gb free ram, and an application requests 1gb. In this case, it will start swapping so it can fulfill the request. ...
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25 views

is it necessary to create swap partition while installing RHEL?

I'm a newbie to RHEL.I've installed RHEL 7 using VMware .but,during the installation ,it asked me to create Swap partition and i created it worth 2GB. please brief me the reasons.what if the swap ...
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76 views

Windows 7 Swapping Threshold

When physical memory jumps to 80%, the RAM starts swapping itself to pagefile. How to increase this 80% threshold to say 90% ? I have 4GB of RAM which means the swapping starts when 3.2GB of RAM is ...
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70 views

Where's my RAM disk being stored?

I'm running an Ubuntu VM under Windows 7, within the VM I've allocated a 5GB RAM disk using sudo mount -t tmpfs -o size=5G tmpfs /mnt/gitRAM and then copied files into it. When I then look at conky ...
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1answer
138 views

linux not using swap, but OOM killer is triggered

I've been having this problem for a long time now, and I can't seem to figure it out, basically, my linux (32bit 3.2.6-3.fc16.i686.PAE) system is refusing to use the swap. When I run $ tail ...
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143 views

What’s eating almost all memory and swap in this Linux machine? (not buffers/cached-related)

I have a Linux machine that reports almost all of its memory and swap are in use, yet I can’t identify any processes using a significant amount of memory on the machine. We are running Linux kernel ...
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38 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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1answer
534 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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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
26 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 ...
0
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1answer
118 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
1k 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
450 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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555 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
233 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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694 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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600 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
141 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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47 views

How to load entire process memory from swap quickly (linux)?

I run a bunch of CPU-hungry processes in parallel, they normally use a few GB of memory each. From time to time they allocate large amount of memory too (say 150-250GB). Usually at most one of the ...
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204 views

OpenWRT and USB write cycle limit

Background (feel free to skip) I am currently usin OpenWRT at home. I have an external HDD connected to router's USB port for the network shared storage. Actual transfer speed from the HDD to the ...
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401 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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38 views

How to limit swap usage?

I want my computer to automatically hibernate when the UPS switches to the battery, so I need enough free swap space at any moment. But if I activate the swap partition, even right before the ...
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315 views

Debian extremely slow resume after hibernate

I have a very irritating issue with my Debian 8: resume after hibernate takes from 5 to 10 minutes. During resume time system shows me picture on a display but not respond, cursor are not moving, ...
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712 views

Is it possible to make a swap space(partition) in windows 8.1 like linux?

I'm using alot of ram on a daily basis and I know you have swap partitions in linux to help this, is it possible to do in windows 8.1 and if so, how? thanks
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46 views

Is it a bad idea to make a swap partition on a SSD?

Since it has limited amount of read/write cycles, it seems to be a bad choice but I have no solid reasoning on why or why not to use it other than that.
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162 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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76 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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328 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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425 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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259 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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14 views

Monitor Linux per-runtime swap statistics

I've recently upgraded a low-end notebook from HDD to SSD, and, since there's only 700MB of RAM and no option of upgrading, I need to use that SSD as a swap drive, too. Since SSDs have a limited ...
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23 views

how does a process know it's pages have been swapped out?

Let's assume I have several processes running, a1 and a2. a2 takes so much space that physical pages belonging to a1 start to get swapped out. a1's page table has to be modified to reflect this. how a ...
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17 views

How to clear swap used on CentOS?

top is showing very high swap used. Which is causing nagios to throw alerts. I've tried running swapoff -a && swapon -a sync; echo 3 > /proc/sys/vm/drop_caches but it doesn't clear the ...
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192 views

How make Fedora load every thing that was in RAM before hibernation into RAM again after wake up?

I use systemctl hibernate to hibernate my (Fedora 22) system. After reboot, It doesn't load everything into memory (Lot of memory stays on the swap) even though I have more then enough RAM for it. ...
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35 views

How to tell how much swap a Windows process actually uses?

In Windows 8.1 x64, I'm running a VBox machine that is configued to use 5200MB RAM. The host OS has 16GB of RAM, however often the other open programs add up and fill up the memory. My theory is that ...
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79 views

How to Logically Swap Fn and CTRL keys in Lenovo E40-80 i5 Laptop?

How to Logically Swap Fn and CTRL keys in Lenovo E40-80 i5 Laptop? As Physical swap is not possible due to key size difference. I have tried the possible methods like looking at BIOS, as suggested by ...
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32 views

Prevent KDE from swapping

I've realized that my laptop was overheating as a result of lots of I/O, so I searched for the programs who used swap, and I found the following: $ pgrep kwin 13387 $ pgrep plasma-desktop 13424 $ cat ...
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159 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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28 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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130 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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80 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 ...