Whenever Linux reads a file, it changes the last access time (known as the atime). This is also true for your web server: If you are getting hit by 50 requests a second, your hard disk will be updating the atime 50 times a second. Do you really need to know the last time a file was accessed? If not, you can disable the atime setting for a directory by typing this:
matthew@seymour:~$ chattr –R +A /path/to/directory
chattr command changes file system attributes, of which “don’t update atime” is one. To set that attribute, use
+A and specify
-R so that it is recursively set.
/path/to/directory gets changed, and so do all the files and subdirectories it contains.