-以最小负载方式运行RMAN备份
RMAN> run{
backup as backupset duration 00:10 minimize load database current controlfile;
backup duration 00:10 minimize load archivelog all delete all input;
}
--限定通道大小方式运行RMAN备份
RMAN> run{
allocate channel c1 device type disk rate 2m format '/home/oracle/db_%U.bak';
backup as backupset database include current controlfile plus archivelog all delete all input;
release channel c1;
}

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