1. Change to oracle user:$
su oracle2. Log in as sys user: $
sqlplus sys/password as sysdba3. Find out flash recovery area usage info, from where we can find the archive log space usage percent: SQL>
select * from V$FLASH_RECOVERY_AREA_USAGE;4. Caculate the space used by flash recovery area:SQL>
select sum(percent_space_used)*3/100 from V$FLASH_RECOVERY_AREA_USAGE;
5. Show Archive log location: SQL>
show parameter log_archive_dest;6. Show recovery area location: SQL>
show parameter recover;7. Delete or move some old archive log files: SQL>
rm -rf archive_log_2011_06_0*;Notice: After step 7, we must use RMAN to maintain the control files, otherwise, the deletion changes can not be apply.8. Log in as RMAN: SQL>
rman target sys/password;9. Find out unused archive log: SQL>
crosscheck archive log all;10. Delete expired archive log files: SQL>
delete expired archivelog all;11. Check the flash recovery area usage info again, make sure archive log files have been deleted: SQL>
select * from V$FLASH_RECOVERY_AREA_USAGE;
12. Finally, increase the recovery file destination size: SQL>
alter system set db_recovery_file_dest_size=3G scope=both;