测试导数据验证一个其它问题，但是突然导入的时候一直卡主了。然后一看日志发现原来impdp导入过程中产生大量归档日志，存储归档的空间满了所以才卡住了
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tail /u01/app/oracle/diag/rdbms/zhanky/zhanky/trace/alert_zhanky.log（主要报错如下）
[root@source ~]# tail /u01/app/oracle/diag/rdbms/zhanky/zhanky/trace/alert_zhanky.log
....
************************************************************************
ARC3: Error 19809 Creating archive log file to '/u01/app/oracle/fast_recovery_area/ZHANKY/archivelog/2019_05_07/o1_mf_1_100_%u_.arc'
Errors in file /u01/app/oracle/diag/rdbms/zhanky/zhanky/trace/zhanky_arc0_2423.trc:
ORA-19815: WARNING: db_recovery_file_dest_size of 4385144832 bytes is 100.00% used, and has 0 remaining bytes available.
************************************************************************
You have following choices to free up space from recovery area:
1. Consider changing RMAN RETENTION POLICY. If you are using Data Guard,
then consider changing RMAN ARCHIVELOG DELETION POLICY.
2. Back up files to tertiary device such as tape using RMAN
BACKUP RECOVERY AREA command.
3. Add disk space and increase db_recovery_file_dest_size parameter to
reflect the new space.
4. Delete unnecessary files using RMAN DELETE command. If an operating
system command was used to delete files, then use RMAN CROSSCHECK and
DELETE EXPIRED commands.
************************************************************************
...
因为是测试环境所以只是开启了归档其它啥都没设置，于是就默认存放位置载db_recovery_file_dest_size 下，默认也是4G大小。
其实解决方法也简单，只不过想起来好久没写博客所以记录一下。主要归档满了，我们可以通过设置限制的大小或者删除归档日志来解决。但是因为我这边测试空间不多所以采用第二种方法删除归档日志。
先新开一个终端，rman target / 运行以下命令。
[oracle@source ~]$ rman target /
Recovery Manager: Release 11.2.0.4.0 - Production on Tue May 7 20:48:26 2019
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
connected to target database: ZHANKY (DBID=2622149390)
RMAN>
RMAN> delete archivelog all;
released channel: ORA_DISK_1
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=1163 device type=DISK
List of Archived Log Copies for database with db_unique_name ZHANKY
=====================================================================
Key Thrd Seq S Low Time
------- ---- ------- - ---------
97 1 100 A 07-MAY-19
.
.
.
.
Name: /u01/app/oracle/fast_recovery_area/ZHANKY/archivelog/2019_05_07/o1_mf_1_100_gf3079ns_.arc
140 1 144 A 07-MAY-19
Name: /u01/app/oracle/fast_recovery_area/ZHANKY/archivelog/2019_05_07/o1_mf_1_144_gf30osyo_.arc
Do you really want to delete the above objects (enter YES or NO)? yes
deleted archived log
archived log file name=/u01/app/oracle/fast_recovery_area/ZHANKY/archivelog/2019_05_07/o1_mf_1_100_gf3079ns_.arc RECID=97 STAMP=1007672299
deleted archived log
.
.
.
.
archived log file name=/u01/app/oracle/fast_recovery_area/ZHANKY/archivelog/2019_05_07/o1_mf_1_144_gf30osyo_.arc RECID=140 STAMP=1007672763
Deleted 45 objects
RMAN> exit
后面在开就恢复正常了
[root@source ~]# tail /u01/app/oracle/diag/rdbms/zhanky/zhanky/trace/alert_zhanky.log
Archived Log entry 139 added for thread 1 sequence 143 ID 0x9c4b270e dest 1:
Thread 1 advanced to log sequence 145 (LGWR switch)
Current log# 1 seq# 145 mem# 0: /u01/app/oracle/oradata/zhanky/redo01.log
Tue May 07 21:06:03 2019
Archived Log entry 140 added for thread 1 sequence 144 ID 0x9c4b270e dest 1:
Tue May 07 21:06:12 2019
Thread 1 advanced to log sequence 146 (LGWR switch)
Current log# 2 seq# 146 mem# 0: /u01/app/oracle/oradata/zhanky/redo02.log
Tue May 07 21:06:13 2019
Archived Log entry 141 added for thread 1 sequence 145 ID 0x9c4b270e dest 1:
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