title: How to keep alive the connection in PL/SQL Developer?
body: <p>I am using PL/SQL Developer 11.0.4.1774. In my work, I need to use database whole day. Sometimes, during 30-60 minutes, I do not use ide and when I need to use it again, it requires reconnection. </p>
  
  <p>I do not want to reconnect, is there any way to keep the connection alive whole day? </p>