The main goal with suited connectors is to make a lot of money on straight of flush... and if you get lucky 2 pair or top pair in premium circumstances but i wont be considering this last one in the explanation. So since this hand isn't at all like ace king or ace queen which dont want limpers since they can catch, you want the total opposite. You want as many ppl in the hand as possible. Think of it this way... there are 7 ppl, your mid position. If you had ace king you would definitly raise so that someone doesnt get lucky (unless your varying your play). On the other hand you wanna usually just call with 89s. The pot will probably stay the same size anyway! If you just call, usually there are more limpers and the pot gets big with a lot of small callers. If you raise, only like 1 or 2 ppl will call and the pot will be big but with a few ppl. Now, if by any chance you catch a drawing hand or you caught it already on the flop, its more likely that someone has something to call your bet with or to bet (depending on the position, or how you are playing it.)
Now, back to your original question. If someone raises big to you, you are being beat preflop almost for sure... And another thing, its very unlikely that other ppl are going to call that big beat anyway so theres no big point in trying to catch against only like 1 or 2 ppl since in those rare occasions you will most likely scare them off. Now... there are some circumstances in which you can call that big bet. For example, if you want to catch someone offguard you can call or even put in a nice raise to make him think you have a great hand. If you miss the flop you can bluff and theres a good chance he will believe you. If you catch, you can pretend your bluffing and get more money! Win Win situation a lot of the times! Another situation could be if someone raises big and lots of ppl call! In this case most ppl would have high cards, and being so there are bigger chances of lower cards coming. And even if high cards come, if by chance you get the draw, no one will be expecting it, causing you to get even more money. These are the kind of hands that make the most money in poker.
Good luck at the tables!