title: How to remove all inactive CI_Session?
body: <p>Currently, I am saving all CI_Session data in AWS RDS (MySQL) and the number of rows in CI_Session table exceeded over 1,300,000.</p>
  
  <p>I want to sort out all inactive CI_Session, so that I can effectively manage CI_Session table. How do I do this?</p>
  
  <p>Thank you in advance</p>