Dear Sir,
I reach a error message as below,
"ORA-1118 signalled during: ALTER TABLESPACE "IDX001" ADD DATAFILE '/data4/db/.."
as I know, that is reach maximum number of database files

Whether increas parameter DB_FILES in init file for add new data file to database?
what about parameters MAXDATAFILES when we create database?
what relationship between DB_FILES & MAXDATAFILES?