please give your answers

1. i am getting some lock entries in SM12 then how can remove or delete that lock entries?

2. how can i deltete table lock?

3. when i am applying support patches getting buffer full problem so how can i clear the buffer?

what the buffer means?how can i get space in Eps/in?

4. if i delete cofiles and data folder entires from the production system what will happen? how can i get space in trans directory?

please donot ignore this.

thanks