一、背景：
数据库开启归档日志，若不及时清理归档日志，系统就会报
ORA-00257: archiver error. Connect internal only, until freed
有没有自动清理归档脚本，不需要每次都手动清理呢？
当然有，实现自动清理归档日志，可以通过 Linux crontab,Oracle rman。
二、编写删除rman脚本
新建一个脚本clearLog.sh
${ORACLE_HOME}/bin/rman nocatalog log=/home/oracle/del_arch$(date +%Y-%m-%d).log <
三、手动测试脚本
赋权：chomd +xclearLog.sh
执行：./clearLog.sh
ok,,查看del_arch.log,能删除归档。
四、添加至corntab
在oracle 用户下执行crontab -e
42 20 * * * /home/oracle/clearLOG.sh晚上20:42分执行clearLog.sh
五、测试与验证
修改crontab中的clearLog.sh运行时间为系统时候后的1分钟 。
1、查看运行日志： more del_arch文件，并无内容
2、查看cron运行日志
more /var/log/cron
Jul 4 18:40:01 orac1 CROND[632]: (root) CMD (/usr/lib64/sa/sa1 1 1)
Jul 4 18:41:18 orac1 crontab[1415]: (oracle) BEGIN EDIT (oracle)
Jul 4 18:41:37 orac1 crontab[1415]: (oracle) REPLACE (oracle)
Jul 4 18:41:37 orac1 crontab[1415]: (oracle) END EDIT (oracle)
Jul 4 18:42:01 orac1 crond[3515]: (oracle) RELOAD (/var/spool/cron/oracle)
Jul 4 18:42:02 orac1 CROND[1604]: (oracle) CMD (/home/oracle/clearLOG.sh)
发现脚本在指定时间运行了，但为什么没有清除归档？百度一下，发现有两种解决方案
1、使用su - oracle -c
2、添加oracle 环境变量
六、添加oracle 环境变量
切换至oracle 用户
more .bash_profile
将oracle 相关的环境变量粘贴至clearLog.sh文件中
export ORACLE_BASE=/u01/app/oracle
export ORACLE_HOME=$ORACLE_BASE/db
export ORACLE_SID=orcl1
export ORACLE_UNQNAME=orcl
export ORACLE_TERM=xterm
export NLS_DATE_FORMAT="yyyy-mm-dd hh24:mi:ss"
export NLS_LANG="AMERICAN_AMERICA.AL32UTF8"
export PATH=$ORACLE_HOME/bin:$ORACLE_HOME/oui/bin:/usr/bin:$PATH
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib
export CLASSPATH=$ORACLE_HOME/JRE:$ORACLE_HOME/jlib:$ORACLE_HOME/sdbms/jlib
export NLS_LANG=AMERICAN_AMERICA.ZHS16GBK
${ORACLE_HOME}/bin/rman nocatalog log=/home/oracle/del_arch$(date +%Y-%m-%d).log
<
七、再次测试与验证
[oracle@orac1 ~]$ ls
backup clearLOG.sh_bak core.14518 del_arch-07-04.log
clearLOG.sh core.14076 core.14561
[oracle@orac1 ~]$ wc -l del_arch-07-04.log
79 del_arch-07-04.log
[oracle@orac1 ~]$ more del_arch-07-04.log
Recovery Manager: Release 11.2.0.3.0 - Production on Fri Jul 4 20:31:04
Copyright (c) 1982, , Oracle and/or its affiliates. All rights reserved.
RMAN>
connected to target database: ORCL (DBID=1367727099)
using target database control file instead of recovery catalog
RMAN> 2> 3>
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=174 instance=orcl1 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=190 instance=orcl1 device type=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: SID=217 instance=orcl1 device type=DISK
allocated channel: ORA_DISK_4
channel ORA_DISK_4: SID=113 instance=orcl1 device type=DISK
List of Archived Log Copies for database with db_unique_name ORCL
=====================================================================
Key Thrd Seq S Low Time
------- ---- ------- - -------------------
68984 1 39462 A -06-23 18:07:21
Name: +ARV1/orcl/archivelog/_06_23/thread_1_seq_39462.2542.851021325
68988 1 39463 A -06-23 18:48:44
Name: +ARV1/orcl/archivelog/_06_23/thread_1_seq_39463.2548.851023995
68992 1 39464 A -06-23 19:33:15
Name: +ARV1/orcl/archivelog/_06_23/thread_1_seq_39464.2555.851027033
68983 2 29516 A -06-23 18:37:56
Name: +ARV1/orcl/archivelog/_06_23/thread_2_seq_29516.2545.851021323
68985 2 29517 A -06-23 18:48:42
Name: +ARV1/orcl/archivelog/_06_23/thread_2_seq_29517.2543.85102
68986 2 29518 A -06-23 19:00:15
Name: +ARV1/orcl/archivelog/_06_23/thread_2_seq_29518.2546.851022997
68987 2 29519 A -06-23 19:16:37
Name: +ARV1/orcl/archivelog/_06_23/thread_2_seq_29519.2550.851023995
68989 2 29520 A -06-23 19:33:14
Name: +ARV1/orcl/archivelog/_06_23/thread_2_seq_29520.2549.851025009
68990 2 29521 A -06-23 19:50:08
Name: +ARV1/orcl/archivelog/_06_23/thread_2_seq_29521.2552.851025979
68991 2 29522 A -06-23 20:06:18
Name: +ARV1/orcl/archivelog/_06_23/thread_2_seq_29522.2558.851027033
deleted archived log
archived log file name=+ARV1/orcl/archivelog/_06_23/thread_1_seq_39462.2542.851021325 RECID=68984 STAMP=851021324
deleted archived log
archived log file name=+ARV1/orcl/archivelog/_06_23/thread_1_seq_39463.2548.851023995 RECID=68988 STAMP=851023995
deleted archived log
archived log file name=+ARV1/orcl/archivelog/_06_23/thread_1_seq_39464.2555.851027033 RECID=68992 STAMP=851027033
deleted archived log
archived log file name=+ARV1/orcl/archivelog/_06_23/thread_2_seq_29516.2545.851021323 RECID=68983 STAMP=851021322
deleted archived log
archived log file name=+ARV1/orcl/archivelog/_06_23/thread_2_seq_29517.2543.85102 RECID=68985 STAMP=85102
deleted archived log
archived log file name=+ARV1/orcl/archivelog/_06_23/thread_2_seq_29518.2546.851022997 RECID=68986 STAMP=851022998
deleted archived log
archived log file name=+ARV1/orcl/archivelog/_06_23/thread_2_seq_29519.2550.851023995 RECID=68987 STAMP=851023995
deleted archived log
archived log file name=+ARV1/orcl/archivelog/_06_23/thread_2_seq_29520.2549.851025009 RECID=68989 STAMP=851025010
deleted archived log
archived log file name=+ARV1/orcl/archivelog/_06_23/thread_2_seq_29521.2552.851025979 RECID=68990 STAMP=851025980
deleted archived log
archived log file name=+ARV1/orcl/archivelog/_06_23/thread_2_seq_29522.2558.851027033 RECID=68991 STAMP=851027032
Deleted 10 objects
RMAN>
Recovery Manager complete.
ok 祝你好运。
