ORA-00059:maximum number of DB_FILES exceeded

By default in every Oracle Database, you can have up to 200 total data files (.DBF files) in each Oracle Database instance as indicated by the value of the parameter “db_files” (you can check the value by running “show parameter db_files” in your database. If you need to create more data files than what the db_files parameter will allow, you will need to increase the value of db_files. If this is not done, you will receive the following error when you either create a new data file for an existing tablespace or create a new tablespace:

Symptom:

create tablespace data_tbs38 datafile "+DATA' size 100M;
*
ERROR at line 1:
ORA-00059: maximum number of DB_FILES exceeded

Solution:

Increase db_files initialization parameter and bounce the database. Increase this parameter will increase the PGA consumption for every server process.

SQL> alter system set db_files=500 scope=spfile sid='*';

System altered.

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