Difference between revisions of "Swap"
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Swapping is when a computer exchanges the location of memory pages between physical RAM and harddisk space. | Swapping is when a computer exchanges the location of memory pages between physical RAM and harddisk space. | ||
| − | + | = add swap space = | |
| − | + | If you want to add swap space to your running system | |
| − | + | * create a file (in this example /tmp/swap with a size of 1GB) | |
| − | + | # dd if=/dev/zero of=/tmp/swap bs=1024k count=1000 | |
| − | + | 1000+0 records in | |
| − | Filename Type Size Used Priority | + | 1000+0 records out |
| − | /tmp/swap file | + | 1048576000 bytes (1.0 GB) copied, 4.35241 s, 241 MB/s |
| − | + | * make it swap space | |
| + | # mkswap /tmp/swap | ||
| + | Setting up swapspace version 1, size = 1023996 KiB | ||
| + | no label, UUID=107e7939-e839-4a0e-b8fb-a50c9e0b96d5 | ||
| + | * tell the kernel to use it for swapping | ||
| + | # swapon /tmp/swap | ||
| + | ;Note: This command did not work with Knoppix 7.02. | ||
| + | * verify it has been added to your swap devices: | ||
| + | # swapon -s | ||
| + | Filename Type Size Used Priority | ||
| + | /tmp/swap file 1023996 0 -1 | ||
| + | |||
| + | = remove swap space = | ||
| + | To remove swap space from your system again, use the [[command]] swapoff, e.g. | ||
| + | # swapoff /tmp/swap | ||
Latest revision as of 11:35, 10 June 2012
Swapping is when a computer exchanges the location of memory pages between physical RAM and harddisk space.
add swap space
If you want to add swap space to your running system
- create a file (in this example /tmp/swap with a size of 1GB)
# dd if=/dev/zero of=/tmp/swap bs=1024k count=1000 1000+0 records in 1000+0 records out 1048576000 bytes (1.0 GB) copied, 4.35241 s, 241 MB/s
- make it swap space
# mkswap /tmp/swap Setting up swapspace version 1, size = 1023996 KiB no label, UUID=107e7939-e839-4a0e-b8fb-a50c9e0b96d5
- tell the kernel to use it for swapping
# swapon /tmp/swap
- Note
- This command did not work with Knoppix 7.02.
- verify it has been added to your swap devices:
# swapon -s Filename Type Size Used Priority /tmp/swap file 1023996 0 -1
remove swap space
To remove swap space from your system again, use the command swapoff, e.g.
# swapoff /tmp/swap
