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 happens when linux OS out of RAM and no swap

What happens when linux OS is out of RAM and no swap is available?
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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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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to move all swap to an SSD: Moving the swapfiles to a dedicated partition in Snow Leopard The information appears to be out of date at ...
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1answer
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Create Linux swap on external USB 3 hard drive

I have an external USB 3 hard drive USB 3 port on Debian, and I would like to create a swap partition on that drive which drive also holds the partitions for databases and other high-volume stuff. ...
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G510 Can I replace screen with higher resolution? [duplicate]

I have got Lenovo G510 with 15,6"1366×768 and I would like to replace with screen with 1920x1080 resolution. Is it possible? Do I have to change lcd cable or just swap screen?
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Creating and enabling an internal storage swap partition on rooted Android Kitkat [migrated]

System: Rooted Android 4.4 phone (actual rom: CM 11 Milestone 6) with 1GB ram, plenty of internal storage, but no sdcard slot. My phone's partition scheme is unmodified CyanogenMod 11. Problem: ...
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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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76 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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274 views

What is swap partition

I read that the swap partition must have the double size of your RAM, that is optional to install, that is for hibernation mode only, several technical information that tells me what to do. I am using ...
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1answer
24 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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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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Linux: don't create swap partition?

I was wondering since I heard that swap is used when you're out or RAM and and swapping too much is bad, since I have a lot of RAM ( 8GB ).... what if I dont create a swap partition? Also, do I need ...
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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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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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Should I keep my swap file on an SSD drive?

I'm considering getting an SSD drive to run as the primary OS partition. As I understand, this should provide a substantial improvement in performance. My question is this: Should I leave the swap ...
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1answer
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How can I use a flash drive to increase my virtual memory?

My computer has 8gb of physical memory. I'm running some memory intensive processes that quickly eat up that 8gb. When the physical memory runs out, it starts using the virtual memory and I see ...
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Does the 4 GB RAM limit on 32-bit systems also affect the swap space?

It is well known that 32-bit systems can only handle 4 GB as maximum amount of RAM. Under Linux, does this limit also apply to swap partitions? If my RAM + swap exceeds 4 GB, will it be fully used? ...
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How can I find out the size of a swap partition?

What are the sizes of the following swap partitions? root@pc:~# swapon -s -v Filename Type Size Used Priority /dev/sda5 ...
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Resizing swap partition (RHEL 5.x)

The following is what parted print outputs: (parted) print Model: VMware Virtual disk (scsi) Disk /dev/sda: 26.8GB Sector size ...
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How to realocate space from the Swap partition to the ext4 'normal' partition in Ubuntu?

My Linux is running in a VM for which I allocated half of the physical amount of RAM (32 div 2) and 20 GB of disk space. I can see the structure of my disks. The 'linux swap' partition took 16GB. ...
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1answer
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Windows 8 pagefile on usb FLASH

Not duplicate :) Windows 8 hides usb flash drives in the list of virtual memory drive list. The picture taken when I installed 2 usb flash drives but they are not in the list. Any body knows the ...
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1answer
190 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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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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How much swap is a given Mac application using?

Is there any way to tell whether a particular application running on Mac OSX (10.2+) has some of its memory swapped out (i.e., to one of the /private/var/vm/swapfile* files)? And how much? Bounty ...
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0answers
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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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What is the swap file for?

I don't get it why is that the more RAM memory you have, the larger the swap file is. Shouldn't it be the other way around? I was under the impression that HDD space is used when there isn't enough ...
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increase desktop responsiveness on linux while swapping

All GNU/Linux distributions I tested so far have the problem that whenever the ram gets filled and the system begins swapping, the whole desktop and graphical user interface becomes unresponsive as ...
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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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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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3answers
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How to increase swap memory in Windows? [duplicate]

I bought a new system with 4 GB of RAM. I don't know how do I check how much swap memory I have allocated. I know that we can increase RAM physically. I want to increase swap memory on windows. How ...
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2answers
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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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1answer
23 views

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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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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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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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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1answer
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I have a Linux swap partition but how do I set it up permanently?

I have a laptop with 2GB RAM and not the funds to buy more RAM. Ever since I installed 64-BIT Mint (MATE desktop), I am using more than 1GB RAM compared to between 170 - 500MB when I was in 32-BIT ...
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Why does my swap partition not appear in GParted (runnning Linux Mint in VMWare)?

I'm running Linux Mint 17 in VMWare. htop reports that I have a swap of size 8187MB: http://postimg.org/image/a54es37wd/ I'd like to increase this but GParted doesn't show any swap partition: ...
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How can I find out processes are using swap space?

I have a linux server top reports about 9GB of swap used: But I cannot figure where's it use swap, some google results said that top - O commad follow by p will show swap usage by process. But as ...
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Reduce “Metafile” memory usage?

My work computer (Windows 7 64-bit) spends a lot of time swapping memory when I switch between programs. This surprises me since I have 4 GB of RAM, and the programs I use aren't particularly RAM ...
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Force swapping of certain stopped processes

When I'm playing minecraft, my computer often has to swap because Google Chrome takes much RAM, too. So, I'd like to manually swap out Google Chrome. I know that I can temporarily stop all its ...
2
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1answer
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Pick which swap partition to use for Suspend to Disk

Is there anyway in Linux to pick which swap partition to use for Suspend to Disk? I have a setup with 2 swap partitions, one on an SSD and one on a HDD. I want the swap partition on the HDD to be used ...
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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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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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1answer
379 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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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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Increase Performance by utilizing RAM instead of swap (Windows 8) [duplicate]

My computer is pretty fast, but I feel it may be getting slowed down by putting things in swap which would do better in RAM. I have 16 GB of ram, and even in conditions where only around 3 GB is used, ...
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What's wrong with disabling the Windows page file?

People say that you always need a page file, and that it will increase performance, but my Windows 7 is set to run without a page file. I simply don't understand why people say this - I have 6 GiB of ...
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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:
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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 ...
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Move swap partition

How can I move swap (sda5) partition in my Debian 7 from main SSD disk to second HDD? lsblk output NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sdb 8:16 0 931.5G 0 disk ├─sdb1 8:17 0 ...