notes in limit holdem

[AKsPRO]

I am low-limit PLO player but I decided to try limit holdem again. And I have a question about making notes on players.
Seems like person who makes a lot of work on making notes after each session (I'm talking about using PT of course) would have a GREAT advantage. In limit there are a lot of showdowns so there so much information available. But its a lot of time! If you are play 4 tables 5-8 hour in a day how can you analyse each showdown-hand?
So... We cant ignore advantage of analysis (and making notes) and we cant spent a lot of time to make this analysis...
Any help and comments?