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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Sharing RAM resources between 2 or more computers

I know there was a somewhat similar question before: How to share CPU or RAM? But, let me just specify it a little more... When Microsoft Windows requires more RAM capacity than available it uses a ...
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Is it possible to mount a swap partition into a directory?

I want to have a look inside the swap partition of an external linux drive. How can I mount it as a regular file system directory? I tried mounting it via mount -o loop,offset=35556433920 -t ...
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Why is my system swapping if there is free RAM available?

I have a KVM host running several virtual machines. The hardware is comprised of 24 cores w/ 40G of ram. This is the output of the free command: total used free ...
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What is the meaning of pri=42

When mounting a swap partition on Linux, what does the mount option pri=42 mean? fstab: /dev/hda1 swap swap pri=42 0 0
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even if we have enough RAM space, why OS will use SWAP memory? [duplicate]

from the above pic, you can see we have 3191 RAM free, but at the same swap is also using about 661 bytes. why it is occurring ? can any give a glance regarding this. Thanks
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Linux - Move partition from back of disk to the front for performance

Hard drives have faster performance at the beginning of the platter (see zone bit recording). According to an answer to "What is the purpose of multiple swap files?", you should put your swap ...
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How to create Swap in Fedora?

I am new about swap and filesystem. Now I encounter a problem: 2G ext4 disk /dev/sda7 # Want to be used as swap in fedora 24G ext4 disk /dev/sda8 # My fedora is built on it without Swap As ...
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When is swap memory useful? Why do we need to set it to twice the amount of RAM? [duplicate]

I know that memory will be swapped whenever RAM usage is high. And I read that we need to set swap to be twice of the amount of RAM. But why? How will it shift from RAM to swap? If we do not have swap ...
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What is the difference between swap entries in fstab?

I've been looking around and seen two different things ways to declare swap in fstab. I've seen something like the line below: UUID=UUID-HERE none swap sw 0 0 and UUID=UUID-HERE none swap swap 0 ...
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Will increasing swap partition size increase the memory that can be used by a program?

I have a program that requires a lot of memory. So much that the malloc fails as the system goes out of memory. I don't care if the overhead for swapping pages in and out of the disk is too high - I ...
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Why won't Ubuntu use swap?

I'm running 32-bit Ubuntu 10.04 on a 4-core AMD Phenom machine with 4GB of RAM. With normal use (a dozen or so Chrome tabs, 1 VirtualBox machine, 2 or 3 instances of QtCreator, ) the memory will ...
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What does the messsage "Adding *k swap on …' mean?

I have the following message in the syslog on some machines: Adding 8385920k swap on /dev/sda3. Priority:-112957 extents:1 across:8385920k What does it mean? Is it a problem? And why is this ...
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What type of data is stored in the swap partition?

When a page fault occurs, the system must fetch the page from disk. Does this mean that there is a page table stored on the hard drive for every running process (to fetch the page from)? If yes, ...
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How to stop swap process in OS X?

How would I prevent OS X even looking for a swap file? I killed the swap file on my MBP. This is dead easy: just change the default swap file location so the system can't find it (goto ...
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Should a Linux Swap partition be on the RAID?

When setting up a new system, if I am planning on mirroring two hard drives, what should I do with the SWAP area? I can think of three things I can do... Do a mirror of the SWAP partition Stripe it ...
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how to check how much memory processes take?

As we know in Linux machines, we have RAM memory and swap memory. My first question is: What is the reason that the swap memory is increasing – because high level of using the RAM memory or ...
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What does it mean to have a swap partition mounted at /dev/null?

I ran swapon -s on a VPS that I’m using and discovered that there’s a swap partition pointing at /dev/null. # swapon -s Filename Type Size Used Priority /dev/null partition ...
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How can I change the amount of data copied back into RAM when resuming in Linux?

Normally when I shut down my computer I hibernate. On the next boot I then resume. My problem is, that it seems that Linux just copies the least amount of data that is needed back into ram, because ...
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How to activate swap on Linux? “swapon -a” doesn't seem to work?

My computer has quite some memory (6GB) which is enough for most of what I do. A while back I was messing with my swap, turning it on and off with sudo swapon -a and sudo swapoff -a. In then end I ...
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Swap and Root: same partition

I have 3 partitions, and I can't delete any of them. (Recovery, SYSTEM, C:), and I need to install GNU/Linux. How can I have swap and root on the same partition?
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Replace 60GB solid state drive with a higher capacity one [duplicate]

Possible Duplicate: Move smaller hard drive to partition on a larger hard drive restore a smaller hard drive 320GB image to a larger harddrive 1TB I have a 60 GB solid state hard drive on ...
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Additional swap created on a new partition gets removed on reboot

I have created a new swap volume using logical volume management tool on RHEL. Suppose the volume is /dev/rootvg/swap2 I did mkswamp /dev/rootvg/swap2 and then swapon /dev/rootvg/swap2 when listing ...
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Linux Virtual Memory/Swap isn't being used

I think my virtual memory is not configured correctly on my MintLinux machine. I opened up a new IDE, IntelliJ IDEA, and my whole system appeared to freeze. I tried to TTL to the console but that did ...
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SSDNow100VS2 Page File (Windows 7) [duplicate]

Possible Duplicates: How to control RAM / swap usage Should I keep my swap file on an SSD drive? I just put an SSDNow100VS2 into my laptop, with Windows 7 Ultimate 64, and 4GB of ram. I'm ...
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Memory and SWAP in Ubuntu

When I go to the system monitor in Ubuntu, about 75% of the Memory is used and 45% of Swap is used. Why is the Swap used even when Memory is available? Doesn't Linux move data from Swap to Memory?
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linux swap disk priority

Let's say you have two swap disks, set up like this: swap1: priority = -1 swap2: priority = -2 Is this going to be any different from the following setup? swap1: priority = 47 swap2: priority = 10 ...
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Memory percentage in top (linux)

Just wondering (1) is the memory percentage in top for a process is relative to memory or relative to memory+swap? (2) if it is the former, how can I get the latter? Vice versa. (3) To determine ...
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Empty swapfile after using dd

According to many tutorials available on the internet (like for example this one https://www.digitalocean.com/community/tutorials/how-to-add-swap-on-ubuntu-14-04 ), to generate a swapfile, i need to ...
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Bind Solaris 10 swap file

I have created an Oracle swap file to enhance my swap space. I have to do this for a Oracle Client installation. After creating swap file i Run the swap command to specify the additional swap space ...
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Is ecryptfs-setup-swap persistent?

I have what I think is a quick question: Is running ecryptfs-setup-swap on a system that didn't have home-directory or swap encryption enabled when it was installed persistent? The man page at ...
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521 views

How to create an encrypted swap partition in Debian 6?

I am installing Debian and would like to set up the /swap partition as encrypted. I am able to select either encrypted physical device or as swap/swap. Are there any methods to create an encrypted ...
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720 views

Mount /tmp on swap in Linux

I have seen this before ... the /tmp directory mounted on swap space. I am aware something similar can be done using tmpfs, but I don't think that what was being used. I too would like to mount /tmp ...
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Mount physical disk with swap included

I'm using VirtualBox and a virtual hard disk, formatted as a swap partition, for booting a virtual machine with a USB key. The guest machine is Ubuntu 10.04. I realized that there's no swap partition ...
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Do Linux swap partitions need to be cloned?

I'm in the process of cloning my hard disk in order to test some unstable software. One of the partitions is Linux-swap. From my understanding, it can be used by the os as additional ram. So this ...
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Page file on a separate partition in Windows

I have recently rebuilt my computer (Windows 7 Pro 32bit), and am in the process of paritioning my hard drive. My question is, is it beneficial to make a separate partition for the page file, rather ...
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How can I get vim to set an ACL on its swap files?

I use vim on an OS X Snow Leopard Server machine. A number of the directories I work in have ACLs (so that various groups of users can access them over AFP) that are inherited. For some reason, when ...
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tweak windows 7 virtual memory and cache / caching settings

im on windows 7 64 bit, with 4gb of memory whenever i copy or deal with a big ammount of data, windows swaps out everything from memory to the virtual memory swapfile, to make room to data cache. ...
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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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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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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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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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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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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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Move swap contents back to the RAM once there's free memory

So I understand that swap mem is used when computer runs out of space on ram. Once there is available space in the memory how can I move contents of swap to ram so taht it doesn't slow me down?
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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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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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Swap performance testing

I understand the general concept of swap memory, but I need to somehow build a program that forces the use of swap memory for performance testing and I don't know where to even begin. Basically, I am ...
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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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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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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 ...