Flashback area not enough, leading archived failed

1) flashback area not enough,leading archived failed 1@@@@ Example I do too much dml operation with huge redo logs. So... [oracle@station78 ~]$ sqlplus / as sysdba; Connected to an idle instance. SYS@ocm> startup ORACLE instance started. Total System Global Area? 524288000 bytes Fixed Size??? ??? ??? 2022016 bytes Variable Size??? ??? ? 159384960 bytes Database Buffers??? ? 356515840 bytes Redo Buffers??? ??? ??? 6365184 bytes Database mounted. ORA-16038: log 1 sequence# 53 cannot be archived ORA-19809: limit exceeded for recovery files ORA-00312: online log 1 thread 1: '/u01/app/oracle/oradata/ocm/redo01.log' @@@Cat the alert_log: ...... ARC0: Archiving not possible: No primary destinations ARC0: Failed to archive thread 1 sequence 53 (4) ARCH: Archival stopped,error occurred. Will continue retrying Thu Jan 10 15:50:26 2013 ORACLE Instance ocm - Archival Error Thu Jan 10 15:50:26 2013 ORA-16014: log 1 sequence# 53 not archived,no available destinations ORA-00312: online log 1 thread 1: '/u01/app/oracle/oradata/ocm/redo01.log' Thu Jan 10 15:50:26 2013 Errors in file /u01/app/oracle/admin/ocm/bdump/ocm_arc0_17738.trc: ORA-16014: log 1 sequence# 53 not archived,no available destinations ORA-00312: online log 1 thread 1: '/u01/app/oracle/oradata/ocm/redo01.log' Thu Jan 10 15:51:01 2013 ...... SYS@ocm> show parameter recovery NAME??? ??? ??? ??? ???? TYPE??? ?VALUE ------------------------------------ ----------- ------------------------------ db_recovery_file_dest??? ??? ???? string??? ?/u01/app/oracle/flash_recovery ??? ??? ??? ??? ??? ??? ?_area db_recovery_file_dest_size??? ???? big integer 2G recovery_parallelism??? ??? ???? integer??? ?0 SYS@ocm> alter system set db_recovery_file_dest_size=5G ; System altered. @@@Cat the alert_log: ...... ALTER SYSTEM SET db_recovery_file_dest_size='5G' SCOPE=BOTH; Thu Jan 10 15:51:10 2013 alter database open Thu Jan 10 15:51:10 2013 Block change tracking file is current. db_recovery_file_dest_size of 5120 MB is 40.45% used. This is a user-specified limit on the amount of space that will be used by this database for recovery-related files,and does not reflect the amount of space available in the underlying filesystem or ASM diskgroup. Thu Jan 10 15:51:11 2013 Thread 1 advanced to log sequence 56 Thread 1 opened at log sequence 56 ? Current log# 1 seq# 56 mem# 0: /u01/app/oracle/oradata/ocm/redo01.log Successful open of redo thread 1 Thu Jan 10 15:51:12 2013 MTTR advisory is disabled because FAST_START_MTTR_TARGET is not set Thu Jan 10 15:51:13 2013 Archiver process freed from errors. No longer stopped Thu Jan 10 15:51:13 2013 Starting background process CTWR CTWR started with pid=22,OS id=18022 Block change tracking service is active. Thu Jan 10 15:51:13 2013 SMON: enabling cache recovery Thu Jan 10 15:51:13 2013 Successfully onlined Undo Tablespace 1. Thu Jan 10 15:51:13 2013 SMON: enabling tx recovery SMON: Parallel transaction recovery tried Thu Jan 10 15:51:14 2013 Database Characterset is AL32UTF8 replication_dependency_tracking turned off (no async multimaster replication found) Starting background process QMNC QMNC started with pid=28,OS id=18034 Thu Jan 10 15:51:15 2013 Completed: alter database open ...... SYS@ocm> alter database open; Database altered. ?