River Play

[Jorge10]

Ok I cant figure out how much to raise on the river when I got the nuts and a guy puts out a feeler bet. Like say I got:

A [img]/images/graemlins/heart.gif[/img]2 [img]/images/graemlins/club.gif[/img]7 [img]/images/graemlins/diamond.gif[/img]8 [img]/images/graemlins/heart.gif[/img]

Board:6 [img]/images/graemlins/diamond.gif[/img]5 [img]/images/graemlins/heart.gif[/img]K [img]/images/graemlins/heart.gif[/img]Q [img]/images/graemlins/club.gif[/img]J [img]/images/graemlins/heart.gif[/img]

And I know this guy has a flush as he suddenly bets on the river, say the pot is something like 70, so he bets out 30 and has about 100 left behind.

The question is how much do you raise him?

I used to think, well just jam it and try to take everything, but I constantly see people fold when someone shoves like that. The question is how much should you raise?