How to disable Spotlight

Disabling Spotlight in Snow Leopard is pretty easy, launch the Terminal and type the following command:

sudo
mdutil -a -i off

This tells the Spotlight manager to disable all indexing on all volumes, the command will require your administrative password to execute.

Re-enabling Spotlight in Mac OS X 10.6
Snow Leopard is just as easy, just reverse the command to:

sudo
mdutil -a -i on

Now Spotlight indexing will be back on and work as usual.