"WARNING: %s of %s bytes is %s%% used, and has %s remaining bytes available."
*Cause: DB_RECOVERY_FILE_DEST is running out of disk space.
*Action: One of the following:
1. Add disk space and increase DB_RECOVERY_FILE_DEST_SIZE.
2. Backup files to tertiary device using RMAN.
3. Consider changing RMAN retention policy.
4. Consider changing RMAN archived log deletion policy.
5. Delete files from recovery area using RMAN.