CREATING LOAD ON MYSQL

i m using mysql server for different application

now i need to test my database optimal performance when a simple query runs such as "select col_name from tab_name where col_name='value' "
and a heavy load been applied to the database

i downloaded loadUI-1_5_0 for the purpose of applying load but can't understand how to apply it can any1 help me moreover i have to use it on stand alone database

any help is appreciated
abhijit