fact: Oracle Server - Enterprise Edition
symptom: Database Connection fails
symptom: ORA-00020: maximum number of processes (num) exceeded
cause: The database instance has too few processes allocated.
fix:
1. Edit the database init.ora file
2. Locate and increase the processes parameter to a higher value.
3. Save the init.ora file
4. Stop and restart the database
5. Re-connect to the database instance