atd, batch // Setting the load limiting factor

Found a solution:

• Create a file: /etc/init/atd.override
• Add a line exec atd -l 7.2
• Then sudo service atd restart

It has to do with how the 'Upstart init daemon' works. Explanations there: http://linux.die.net/man/5/init If the file /etc/init/atd.override already exists with an line starting with exec, edit this line.