DB_FILES

Parameter type	Integer
Default value	200
Parameter class	Static
Range of values	Minimum: the current actual number of datafiles in the database Maximum: the value that was specified in the MAXDATAFILES clause the last time CREATE DATABASE or CREATE CONTROLFILE was executed
Oracle9i Real Application Clusters	You must set this parameter for every instance, and multiple instances must have the same value.

DB_FILES specifies the maximum number of database files that can be opened for this database. The maximum valid value is the maximum number of files, subject to operating system constraint, that will ever be specified for the database, including files to be added by ADD DATAFILE statements.

If you increase the value of DB_FILES, you must shut down and restart all instances accessing the database before the new value can take effect. If you have a primary and standby database, they should have the same value for this parameter.

Note: The checkpoint process is enabled automatically if DB_FILES >= 50 or DB_BLOCK_BUFFERS >= 10000. At these values, switching checkpoint processing from the logwriter to a separate process improves performance.

See Also: Oracle9i Real Application Clusters Administration for information on setting this parameter in an Oracle9i Real Application Clusters environment Your operating system-specific Oracle documentation for the default value of this parameter