How long should a poker session be?

[MattsTheMan]

Got vacation going on so there is a lot of poker. I’ve been thinking of how long a poker session should be lately. I had a bad run a month ago or so and at that time I could play 4h without any break.

I did read about this on some poker site and Antonius said who must be one of the better online Pkr players were saying about 2 Hours. I’ve tried 2 Hours and that seems to be pretty good. But today I was sitting at a table where a person had vpip 88 and had made about 6 buyins and reraised a raise with K8o in EP.

In a case like that I am not going to quit until I have the person stacked. How long sessions do you play? I think it is hard to concentrate for 5h in a row.