linux_speed-up

http://law9.com/linux-speed-up-your-filesystem-by-upto-50/
Open your /etc/fstab in the editor of your choice (nano, kate or gedit recommended). This can be done by issuing the command “nano /etc/fstab”, “kate /etc/fstab”, or “gedit /etc/fstab”.
Locate the partitions that contain your / and /home file systems, as well as any other file system you want to optimize. Examples include /dev/hda2 and /dev/hda3, or /dev/sda2 and /dev/sda3.
In the fourth section (just before the two numbers at the end of the line) you will see the options section of the fstab.
Enter “,noatime,nodiratime” after the existing options for each partition you wish to optimize.

$ sudo cat /proc/sys/vm/swappiness 
$ sudo sysctl -w vm.swappiness=10 
vm.swappiness=10 to /etc/sysctl.conf