crontab内容：

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19 1,8,16 * * * sh /home/oracle/rman_del_arch_all.sh > /home/oracle/rman_del_arch_all.sh.out

脚本rman_del_arch_all.sh的内容：

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export ORACLE_BASE=/database/oracle/product
export ORACLE_HOME=/database/oracle/product/rdbms/11.2.0
export ORACLE_SID=hnpay1
export NLS_LANG=AMERICAN_AMERICA.AL32UTF8
export PATH=.:${PATH}:$HOME/bin:$ORACLE_HOME/bin
export PATH=${PATH}:/usr/bin:/oracle/app/grid/bin:/bin:/usr/bin/X11:/usr/local/bin
export PATH=${PATH}:/opt/oracle/ogg/ggircn:$ORACLE_HOME/OPatch:$ORACLE_BASE/common/oracle/bin
export LD_LIBRARY_PATH=$ORACLE_HOME/lib
rman target / <<EOF
crosscheck archivelog all;
delete noprompt archivelog all completed before 'sysdate-0.5';
exit
EOF

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自动清理oracle 归档脚本