Newbie question about commit

Hello I am fairly new to JSF (a week) now I am having a trouble with a commit and running out of memory.

My problem its the table (Mysql) its a way to big, while I am doing pagination for the loading I dunno how to deal with the saving (using woodstock netbeans web jsf framework).

Someone mention me to use a data model anyone know where I can get a example of this kind of behavior?

Sorry for my bad english

Ok I narrow down my problem, forgive me if I am to new and the question its stupid, it seems when I create the new row, its set into a cache, now I send default values to the fk camps, still when I try to save the page won't even read the code inside the save command button, now is this because I am missing something on the prerender method?