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.
4
votes
2answers
328 views
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?
...
2
votes
1answer
29 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 ...
0
votes
1answer
45 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 ...
9
votes
3answers
150 views
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 ...
0
votes
2answers
47 views
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 ...
4
votes
1answer
75 views
What happens when you try to hibernate but there is not enough swap available?
I have a Linux box with a swap partition of size RAM + x. Suppose more than x of the swap is already in use. Now I try to hibernate. Will the kernel
randomly kill sleeping and/or not sleeping ...
2
votes
1answer
40 views
Should I use the openSUSE installer to encrypt /swap until ecryptfs is updated to work with systemd?
I recently installed openSUSE 12.3. I didn't use any partition encryption in the installer. Immediately after the install was complete, I installed ecryptfs-utils and ran ecryptfs-migrate-user -u ...
1
vote
1answer
36 views
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 ...
0
votes
0answers
57 views
With modern operating systems, does using swap really help or hurt? [closed]
Let me start with some examples:
A NAS OS that boots from USB flash into ram and runs from there
The system typically runs with about 25-50% memory load, and under extreme activity may tend to go up ...
0
votes
0answers
31 views
Partitioning on a multiboot laptop
I have a Fujitsu AH531 laptop with 320GB HDD.
Currently, I have 3 OS installed on it: Win7, Win8, Linux Mint14 and a bulk part for archiving my files.
Now I wanna allocate another part to commence ...
3
votes
1answer
59 views
Where is terminal scroll back information stored (how does tmpfs work)?
While trying to test something unconnected, I launched an infinite loop on my terminator terminal emulator which printed a lot of data to STDOUT. After running it for a few minutes, I noticed that my ...
17
votes
2answers
721 views
Linux Mint doesn't boot after creating a swap partition
When I was creating my Linux hard drive, I skipped creating a swap partition, thinking that 4GB would be enough RAM. Now, I think I do need a swap partition. I asked some people on IRC how to do this, ...
0
votes
2answers
388 views
Swapon failed: Invalid argument on a Linux system with Btrfs filesystem
What's wrong with this sequence of operation, running on a Debian Squeeze system with a Btrfs filesystem?
$ dd if=/dev/zero of=swapfile2 bs=1024 count=524288
$ sudo mkswap swapfile2
$ sudo chown ...
4
votes
3answers
460 views
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?
0
votes
3answers
55 views
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 ...
-1
votes
1answer
261 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 ...
0
votes
2answers
113 views
Turn off swap for single program. Windows 8
Can I turn off using swap for single program? Visual Studio for example.
Or set high priority of using memory by this program?
0
votes
4answers
93 views
Partitioning a Linux based system
I am using Linux Mandriva OS. During installation my friend suggested 2GB for the swap partition and the remainder as the root partition. What is the use of providing a separate space for root? ...
0
votes
1answer
66 views
Can I temporarily swap out my new MacBook hard drive with the old one?
I recently upgraded my standard hd to an ssd. There are some files on the old one that I still need to access. Can I simply swap the current one for the old one temporarily? Just to email off some ...
2
votes
1answer
111 views
Too Much Swapping, even though RAM is ~75% Empty
I have a VPS with 9GB RAM, 300GB HDD, 3 GB Swap, 7 Cores.
The OS is CentOS 5.7 Final.
I have postgres9.0 running on my machine, with proper tuning done (at least by book/wiki of PostgreSQL).
What ...
0
votes
0answers
70 views
Using a UUID to mount a swap volume causes startup to hang?
I have a mdadm RAID setup complete with a swap volume. I can use the volume for swap easy enough, but when I go to mark it as swap in the fstab, I get a system startup hang.
# /dev/md125
...
1
vote
1answer
119 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 ...
1
vote
1answer
109 views
How do I prevent my computer from freezing when it starts to swap?
I work as a Java programmer, so I often have to run several programs at the same time that consume a lot of memory.
When my memory is full and Linux starts swapping, my computer almost completely ...
1
vote
0answers
26 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 ...
-1
votes
2answers
343 views
Why using swap file over a SMB/NFS mounted filesystem is not possible in Linux?
I'd like to use another machine's unused RAM as swapspace for my primary Linux installation. I was just curious about performance of network ramdisks compared to local (slow) mechanical hard disks.
...
4
votes
2answers
140 views
swap rule 1.5 *memory= swap still valid [duplicate]
Possible Duplicate:
Why should the size of the swap partition be double of the RAM size?
Does the rule of 1.5 *memory= swap still apply in these days where systems can have32 GB of memory. ...
3
votes
1answer
112 views
How can I use a remote machine for swap space?
I have two Linux boxes, one of which doesn't have much RAM or disk space. How would I go about setting up a swap file on the second machine for the first to use?
3
votes
2answers
204 views
More RAM than motherboard supports using ram disk + swap?
I want to put 6GB of RAM in a motherboard that supports 4. I heard something about using the excess RAM as a RAM disk and formatting that partition as SWAP, but that doesn't seen like it will work.
I ...
5
votes
1answer
869 views
Confused about Windows 7 64-bit page file with SSD
I followed this advice to get Windows to use more RAM and less paging. To be honest, I'm a total noob to all this page file stuff. I've always just assumed that Windows was using the 8 GB of ram I ...
1
vote
1answer
244 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 ...
0
votes
0answers
43 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 ...
0
votes
1answer
581 views
New Ubuntu 12.04 install doesn't have swap working
This is a brand new Ubuntu 12.04 installation on my netbook. During installation I selected to encrypt my home folder. Now I'm trying to set up hibernation, but my swap partition isn't working. ...
1
vote
1answer
802 views
controling tmpfs memory usage
Any way to limit the amount of RAM used by tmpfs wihtout limiting the amount of swap?
Most documentations says that tmpfs' size option will limit the total size of the tmpfs partition and later on ...
14
votes
3answers
7k views
Why OS X use swap when there is lots of “inactive memory”?
I am using OS X from few months (Lion and now Mountain Lion). I have 8 GB on my mini and almost daily now it get close to that. On Windows 7 machine with 8 GB I never had that kind of problem. Anyway, ...
1
vote
1answer
255 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:
...
2
votes
2answers
896 views
Linux zram (compcache) + SwapCached
I have a question about zram + swapcached. I know that zram is a
compressed swap in memory, but linux use it's own internal SwapCached
area to store recent swap pages also in memory. I have a 512MB ...
0
votes
2answers
947 views
How much swap space needed for 4GB RAM [duplicate]
Possible Duplicate:
Swap partition size for 4GB RAM
For 4GB RAM how much swap space needed ?
If I made 8GB as swap space, weather my system become slow ? If so then what is the reason for ...
0
votes
1answer
245 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 ...
1
vote
1answer
447 views
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 ...
-1
votes
1answer
79 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 ...
1
vote
1answer
131 views
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 ...
0
votes
1answer
1k views
Windows 7 Hard fault / Page fault and memory bottleneck
Windows 7 resmon displays 0 hard faults.
But perfmon shows pagefault around 60 and perfmon /report tells me my system swaps actively.
AFAIK not every page fault is hard fault: page could be stored ...
4
votes
4answers
1k views
'cache swap' filesystem for SSD/HDD combo?
As we all know, Solid State Drives (SSD) are expensive ($/Gb) but they are quick to access. I'm wondering if there exists a sort of software-kernel-level 'cache swap' filesystem technology; the idea ...
3
votes
1answer
2k views
Disable Mac's dynamic_pager?
I read this blog post about the memory management in Mac OS X: http://workstuff.tumblr.com/post/20464780085/something-is-deeply-broken-in-os-x-memory-management
I would like your opinion on the ...
2
votes
2answers
736 views
How to use compcache for Linux 3.2 (Debian Wheezy)
How do I set up and configure compcache for Debian Wheezy (3.2 kernel). As far as I can understand compcache is now in the kernel and is not to be found in the debian repo either. Compcache should be ...
5
votes
2answers
195 views
How to “swap in” again memory from page file to physical memory in Windows at once (like linux swap-off)
Is there a way to swap back in (to put back all the memory data that was put into the page file (or swap, whatever you prefer)) memory on a windows PC?
On linux, one can easily do this with the ...
1
vote
2answers
2k views
Using SSD as Linux RAM
I have a very very fast SSD OCZ Revo. I want to use a lot of RAM but I'm limited to 4GB RAM for the moment. If I use my SSD OCZ Revo as swap (the whole of it, 160GB), does that mean I have effectively ...
2
votes
3answers
380 views
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 ...
0
votes
2answers
207 views
Swap implication in Linux and way to increase it
I used top command to print this on Linux box:
[root@localhost ~]# top
top - 23:38:38 up 361 days, 12:16, 2 users, load average: 0.09, 0.06, 0.01
Tasks: 129 total, 2 running, 126 sleeping, 1 ...
1
vote
1answer
2k views
Would upgrading memory from 4GB to 8GB on my laptop solve swapping issues?
I have a laptop with 4GB of memory with Windows 7 on it and I often experience with Eclipse that it is swapped out to disk.
On the net they usually write 4GB of RAM is more than enough for average ...
