Your DB_RECOVERY_FILE_DEST_SIZE IS 8G,Currently,5G of the space is used of which 4G consists of obsolete backups, You execute this command;
SQL> ALTER SYSTEM SET db_recovery_file_dest_size=2G;
What is the outcome?
A) It changes DB_RECOVERY_FILE_DEST_SIZE to 2G and deletes the obsolete backups
B) It changes DB_RECOVERY_FILE_DEST_SIZE to 5G
C) It fails because DB_RECOVERY_FILE_DEST_SIZE is a static parameter
D) It changes DB_RECOVERY_FILE_DEST_SIZE to 2G without deleting valid backups
E) It fails because the new size is less than 5G
Answer: D (verified)
CUUG: there is free space because the current 3G, so no need to delete the active and inactive backup.
Zhao: User A is selected to be authenticated. Personally think that the only valid backup 1G, 2G after less than is modified, no need to delete obsolete backup.
Translated title: DB_Recovery_file_DEST_size to 8G, space currently used for the 5G, 4G which by the outdated backup components.
Other: A measurement will not be deleted