CI session database, lot of data

[eluser]CroNiX[/eluser]
Also, you wrote different code for your 2 examples.

When you used $_SESSION, you ran session_start(); in each method before trying to set or read session data.

When you used CI session, you only loaded session in the test() method. You also need to load session in test2(), like you did for your $_SESSION. session_start() gets run when you load the session library. This is one of the libraries that should be autoloaded.