We start a database without sqlnet.ora file. So as SQLNET.EXPIRE_TIME is not configured, some process has been disconnected.
We had sqlnet.ora with a SQLNET.EXPIRE_TIME=1, restart the listener but have still the same problem (somme disconnected process after an idle time). It seems that the database ignore this new parameter.
We use shared server for this db (11.2).
Do you have any suggest (of course, it's impossible to restart the database)?