Swappiness=0__linux of Linux swap space

Linux uses a portion of the hard disk as a swap partition for process scheduling--the process is a running program--tune the currently unused process to ' wait (standby) ', or even ' sleep ', once it is used, and then tuned to ' Activities (Active) ', the process of sleep lying to the swap partition, the memory empty out to the ' activity ' process.
If the memory is large enough, you should tell Linux not to use the SWAP partition too much, and you can modify the Swappiness value. Swappiness=0 the maximum use of physical memory, and then the swap space, swappiness=100 when the positive use of the swap partition, and the memory of the data in a timely manner into the swap space.
In Linux, the default setting swappiness this value is equal to 60.

　　
Now generally 1 g of memory can be modified to 10, 2 G can be changed to 5, or even 0. To do this specifically:
1. View the swappiness in your system
$ cat/proc/sys/vm/swappiness
No surprises, you should see it's 60.
2. Modify Swappiness value to 10
$ sudo sysctl vm.swappiness=10
But this is only a temporary change, after you restart the system will restore the default 60, for long-term stability, but also to further:
$ sudo gedit/etc/sysctl.conf
At the end of this document, add this line:
vm.swappiness=10
Then save and reboot. OK, your settings are in effect.