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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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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537 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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3answers
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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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1answer
27 views

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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2answers
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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
544 views

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
33 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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402 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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1answer
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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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427 views

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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1answer
158 views

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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0answers
131 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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1answer
1k 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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2answers
2k views

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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1answer
852 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:
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1answer
146 views

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 ...
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1answer
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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2answers
656 views

Can I use Nand flash as a swap memory in Embedded Linux?

I have 128 MB of Ram in one of my products, which was sufficient when we released first version of the product. But now we added some extra features in it, So this much Ram may cause a problem of OOM. ...
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2answers
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how much swap space is too much on x64 and will cause problems?

Apart from using up too much disk space, how much swap space can you allocate before it will degrade performance or cause problems on an x64 OS? What differences are there between the x64 OSes? I'm ...
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50 views

Windows page file

I'm working on some CGI and am running out of RAM as well as page file space. However I have a second drive with a little extra space I could use for swapping. I have one question: If the swap space ...
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1answer
1k views

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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1answer
314 views

Use swap only for hibernation

I have a swap partition /dev/sda1. It is 2GB in size and i only want to use it for hibernating. My system has 4GB of RAM. When I am low on RAM the kernel starts swapping and I can't even switch to a ...
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1answer
108 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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1answer
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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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 ...
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2answers
4k views

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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1answer
1k views

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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1answer
163 views

Grub rescue after windows install

Disaster, Please, Help ASAP. I had a dual boot on my pc with windows xp and lubuntu linux. Then recently i had some windows errors and decided to install windows 8 instead of xp. So after i ...
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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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2answers
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How to load entire program from pagefile quickly?

Sometimes I do not use some programs with high memory usage (e.g. virtual machine with 2 GB of memory) for several days. When I return to it, its memory is mostly swapped onto HDD. When I try to work ...
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1answer
4k views

Modify Windows “Swappiness”

Is there a modifiable equivalent of "swappiness" in Windows 7? My system has 8GB of RAM which is more than enough for my day-to-day use. I'd like to modify swap behaviour, what *NIX systems call ...
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6answers
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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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Swap is empty on Linux

How can I create or resize the swap memory on a linux device (Amazon Linux AMI). The problem came when I run a program and it gave me that errors: IOError: [Errno 28] No space left on device INFO ...
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5answers
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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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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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Why does swapon take ages when enabeling a swap file?

I've created a swap file with dd if=/dev/zero of=swap.img bs=1024k count=4k mkswap swap.img swapon swap.img While this works, the swapon command takes ages (approx 10min) to finish. Enabling the ...
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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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1answer
164 views

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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How can I encrypt the swap file under Windows 7?

Mac OS X has the ability to use "secure virtual memory", meaning that anything from RAM that is swapped out to disk is encrypted. This improves security by making sure no passwords / keys are ever ...
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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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1answer
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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Is it possible to hint Windows to bring a process completely out of swap

Is it possible to hint the Windows virtual-memory-manager to bring a particular process out of swap? The situation I often find myself in is normally using about 50% of my RAM for all the normal ...
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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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1answer
207 views

Linux swap robustness and/or mirroring - kernel 3.2

i have 8x 2TB disks in raid6 with mdadm and I decided to add a little "slack" partition to each drive just in case a replacement drive is not exactly the same size of the drives i now use. The purpose ...
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3k views

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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Swapfile on different drive

Is it worth to spend money on a small capacity HDD (~5-20 GB, very cheap though) to use it as swapping area for the OS? I do believe it will increase the OS performance , or maybe SSD (still ~5-20 ...