CONTROL_FILES

Property	Description
Parameter type	String
Syntax	CONTROL_FILES = filename [, filename ] ... Note: The control file name can be an OMF (Oracle Managed Files) name. This occurs when the control file is re-created using the CREATE CONTROLFILE REUSE statement.
Default value	Operating system-dependent
Modifiable	No
Range of values	1 to 8 filenames
Basic	Yes
Real Application Clusters	Multiple instances must have the same value.

Every database has a control file, which contains entries that describe the structure of the database (such as its name, the timestamp of its creation, and the names and locations of its datafiles and redo files). CONTROL_FILES specifies one or more names of control files, separated by commas.

Oracle recommends that you multiplex multiple control files on different devices or mirror the file at the operating system level.

Note:

1. Query for the current value of the parameter

select name, value, isdefault, isses_modifiable, issys_modifiable,

isinstance_modifiable, isdeprecated, description

from v$parameter where upper(name) = 'ARCHIVE_LAG_TARGET';

NAME	VALUE	IS DEFAULT	ISSES_ MODIFIABLE	ISSYS_ MODIFIABLE	ISINSTANCE_ MODIFIABLE	IS DEPRECATED	DESCRIPTION
control_files	/ora_data/mydb/control01.ctl, /ora_data/mydb/control02.ctl	FALSE	FALSE	FALSE	FALSE	FALSE	control file names list

Oracle initializatoin parameters