Solution to shutdown failure in Oracle 11g

Problem description: The database insertion Operation, after commit, and then shutdown, Oracle did not respond.

Solution: Because the database has a large amount of data to roll back, execute
SQL> alter system checkpoint;
SQL> shutdown immediate;

The database has been closed.
The database has been detached.
The Oracle routine has been disabled.

Another: If in the middle, the execution of shutdown did not respond to close, in the login, will report "ORA-01012: not logged on" error, You can restart the service, and then login to solve.