Can I feed my baby too much?

Sorry if this sounds a silly question. The baby books don't really advise on portion size as such.

On an average day my baby will eat

6.15am - 8oz formula

9.15am - 5 scoops baby porridge porridge made with 3oz formula

12.00 - 6oz formula

14.00 - vegetables (about 5 tablespoons full

16.00 - 6oz formula

19.00 - 8oz formula

Total formula around 31oz

Plus its a big bowl of porridge and vegtables. I've been gradually increasing the quantity of food but he still opens his mouth when it's finished. I'm just surprised how much he can eat already lol. He's around 17lbs. My first baby didn't eat this much I don't remember.