Init parameterFiles & storage

DB_CREATE_FILE_DEST

What it controls

Default location for Oracle-managed datafiles and tempfiles.

Know this before you change it

With it set, ADD DATAFILE needs no file name.

Check and change it

1-- Current value on every instance2SELECT inst_id, name, value, isdefault, ismodified3FROM gv$parameter4WHERE name = 'db_create_file_dest';5 6-- Value stored in the spfile7SELECT sid, value FROM v$spparameter WHERE name = 'db_create_file_dest' AND isspecified = 'TRUE';8 9-- Dynamic: takes effect now and is kept after a restart10ALTER SYSTEM SET db_create_file_dest = '+DATA' SCOPE = BOTH SID = '*';11 12-- Or for your own session only13ALTER SESSION SET db_create_file_dest = '+DATA';14 15-- Remove it from the spfile to go back to the default at the next restart16ALTER SYSTEM RESET db_create_file_dest SCOPE = SPFILE SID = '*';

Open in the parameter referenceOracle's reference

More in Files & storage

• DB_CREATE_ONLINE_LOG_DEST_NLocations for Oracle-managed online redo logs and control files. Numbered 1 to 5; each one holds a member of every group.
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• DB_FILESThe most datafiles the database can have open.
• FILESYSTEMIO_OPTIONSAsynchronous and direct I/O for datafiles on file systems.
• DEFERRED_SEGMENT_CREATIONWhether new tables and indexes get space only when the first row arrives.
• RECYCLEBINWhether dropped tables go to the recycle bin so they can be flashed back.
• MAX_STRING_SIZEEXTENDED raises VARCHAR2, NVARCHAR2 and RAW limits from 4000 to 32767 bytes.