Linux kernel developer Ingo Molnár called atime perhaps the most stupid Unix design idea of all times. http://lwn.net/Articles/244829/

/etc/fstab

/dev/mapper/debian--vg-var /var            ext4    defaults        0       2

mount -o remount,noatime /var

http://askubuntu.com/questions/2099/is-it-worth-to-tune-ext4-with-noatime http://neosting.net/optimiser-son-ssd-avec-ubuntu