title: How to list HttpSession objects and size in a ServletFilter without creating performance issues?
body: <p>I´m trying to solve a performance and stability issue in a JEE application caused by some HttpSessions storing large objects. The app is deployed on  Oracle Weblogic Server 12.1.1. but unfortunately I don´t have access to the app code so I´m thinking about creating a ServletFilter to obtain session objects and its size.</p>
  
  <p>Although it seems a theoretical solution, I´m worried about possible performance issues this approach would create on an application that already has performance problems.</p>
  
  <p>I´ll appreciate your comments and ideas on how to do this.</p>
  
  <p>Best Regards.</p>