title: Should I store user data in sessions?
body: <p>Simple question, but not so simple answer. If I store user data into the sessions, then I wouldn't have to get that data from MySQL database. But then that data could get become obsolete. If I store only user_id in session, then I would have to ask database each time for user info and that could lead server to slow down.
  If you got any suggestions, please write them.</p>
  
  <p>Thanks :).</p>