Question about the mini-raise

[kingstalker]

Pokerstars 3+0
I have [img]/images/graemlins/diamond.gif[/img]Q [img]/images/graemlins/club.gif[/img]J on the button
blinds 100/200 two limpers
Flop is
[img]/images/graemlins/spade.gif[/img]Q [img]/images/graemlins/diamond.gif[/img]6 [img]/images/graemlins/club.gif[/img]3
BB checks,MP raises to 200, I re raise to 600,BB calls, and now MP moves all in, I folded, he shows A-Q
I see a lot of players doing the mini raises in the tournments I play in and I am wondering if this is a case where I should of just did a mini raise to feel him out, what kind of a situations should you want to do mini raises in?