There are situations where the database has a high level of locking or other issues that prevents us sign in. A simple way that we are going to allow access is using the parameter -prelim from sqlplus. In accordance with this connection we will be able to basically to perform two actions
hanganalyze or systemstate.
Below is an example of connection with the -prelim option. If you run any type of statement it gives us a error.
HTH – Antonio NAVARRO