oracle清理归档日志

首先确认归档日志是否开启：archive log list；

SQL> archive log list;
Database log mode	       Archive Mode
Automatic archival	       Enabled
Archive destination	       USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence     3017
Next log sequence to archive   3019
Current log sequence	       3019
SQL>

查看归档日志占用的空间大小：

SQL> select * from v$recovery_file_dest;
NAME
--------------------------------------------------------------------------------
SPACE_LIMIT SPACE_USED SPACE_RECLAIMABLE NUMBER_OF_FILES
----------- ---------- ----------------- ---------------
/volumes01/app/flash_recovery_area
 1.0737E+10 2008462336		       0	      86
SQL>
解释：
SPACE_LIMIT： 日志最大空间
SPACE_USED:   日志使用空间
SPACE_RECLAIMABLE：可回收的空间
NUMBER_OF_FILES：日志文件数量

 

SQL> select sum(percent_space_used)*3/100 from v$flash_recovery_area_usage;

SUM(PERCENT_SPACE_USED)*3/100
-----------------------------
      .5613
查询日志占用空间的百分比

查询归档日志：

[oracle@az1-ffs-prd-db-01 ~]$ rman target sys/Oracle123@orcl

Recovery Manager: Release 11.2.0.1.0 - Production on Mon May 13 14:41:31 2019

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

connected to target database: ORCL (DBID=1534994283)

RMAN> crosscheck archivelog all;

using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=52 device type=DISK
validation succeeded for archived log
archived log file name=/volumes01/app/flash_recovery_area/ORCL/archivelog/2019_05_13/o1_mf_1_2993_gfkk8tn0_.arc RECID=272 STAMP=1008148506
validation succeeded for archived log
。。。。。。。。
RMAN>

清理归档日志：

RMAN> delete archivelog until time 'sysdate'; --删除所有日志 
RMAN> delete archivelog until time 'sysdate-7'; --删除7天前的日志
RMAN> delete expired archivelog all;--删除过期日志

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