When i tried to connect to database, I got the ORA-00020: maximum number of processes (%s) exceeded error.
Even from sysdba I was not able to connect.
Step 1 : Connect to database with prelim option and shutdown abort.
$ sqlplus -prelim
SQL> shutdown abort.
Step 2 : Change the processes parameter to a higher value in the init.ora file.
3. SQL> STARTUP