Archived Log entry 30 added for thread 1 sequence 118 ID 0x774e158c dest 1:
Mon Sep 21 10:05:47 2015
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/backupset/2015_09_17/o1_mf_annnn_TAG20150917T195557_bzoblfck_.bkp
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/archivelog/2015_09_17/o1_mf_1_100_bzokvqj0_.arc
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/autobackup/2015_09_17/o1_mf_s_890682958_bzoblglw_.bkp
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/archivelog/2015_09_18/o1_mf_1_101_bzp6zx31_.arc
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/archivelog/2015_09_18/o1_mf_1_102_bzpp9nln_.arc
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/archivelog/2015_09_18/o1_mf_1_103_bzr67h1h_.arc
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/archivelog/2015_09_18/o1_mf_1_104_bzr6812s_.arc
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/archivelog/2015_09_19/o1_mf_1_105_bzs2cj5y_.arc
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/archivelog/2015_09_19/o1_mf_1_106_bzsbq54p_.arc
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/archivelog/2015_09_19/o1_mf_1_107_bzsjm99v_.arc
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/archivelog/2015_09_19/o1_mf_1_108_bztq3f2v_.arc
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/archivelog/2015_09_20/o1_mf_1_109_bzvprgf1_.arc
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/archivelog/2015_09_20/o1_mf_1_110_bzvz4rj7_.arc
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/archivelog/2015_09_20/o1_mf_1_111_bzw50zmb_.arc
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/archivelog/2015_09_20/o1_mf_1_112_bzx7yj9g_.arc
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/archivelog/2015_09_21/o1_mf_1_113_bzypmw8c_.arc
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/backupset/2015_09_21/o1_mf_annnn_TAG20150921T091644_bzypmwty_.bkp
Mon Sep 21 10:05:58 2015
Deleted Oracle managed file /u01/app/oracle/fast_recovery_area/XXXXDB/backupset/2015_09_21/o1_mf_nnndf_TAG20150921T091647_bzypn055_.bkp
Mon Sep 21 10:06:15 2015
ALTER SYSTEM ARCHIVE LOG
Mon Sep 21 10:06:15 2015
Thread 1 advanced to log sequence 120 (LGWR switch)
? Current log# 3 seq# 120 mem# 0: /u01/app/oracle/oradata/XXXXDB/onlinelog/o1_mf_3_bxzzjl0z_.log
? Current log# 3 seq# 120 mem# 1: /u01/app/oracle/fast_recovery_area/XXXXDB/onlinelog/o1_mf_3_bxzzjl35_.log
Archived Log entry 31 added for thread 1 sequence 119 ID 0x774e158c dest 1:
日志里面，Oracle不仅仅删除了部分备份过两次的日志，而且删除了一个已经obsolete的备份集合。这个体现了一个特性：当fast recovery area空间紧张的时候，obsolete和符合删除deletion policy的归档日志会被自动删除。