哪些操作会导致归档切换

在归档文件被写满前，以下配置会强制切换归档

• SQL> alter system switch logfile;
• SQL> alter system archive log current;
• RMAN> backup archivelog all;
• RMAN> backup database plus archivelog;
• ARCHIVE_LAG_TARGET : limits the amount of data that can be lost and effectively increases the availability of the standby database by forcing a log switch after the specified amount of time elapses. you can see this aswell in RAC with an idle/low-load instance.