Data Guard uses alter system archive log current to maintain the Archive Log

When Data Guard uses alter system archive log current to maintain Archive Log Routine Maintenance Data Guard, we can use Archive Log management: www.2cto.com ① alter system switch logfile ② alter system archive log current what is the difference between the two? Alter system switch logfile-only switches the current online log to another group, triggers a checkpoint, and immediately forwards the control back to the caller-this command can be executed in both archive and non-archive modes, -- The system is responsible for non-archiving. If the load is heavy, after switching, it may not be able to return the file alter system archive log current -- switch and archive first, and OK will be returned only after archiving is complete -- So switch logfile is much faster than archive log current sometimes we found Archive Gap in the slave database. If we need to manually fill the Gap, using alter system archive log current is better than using alter system switch logfile, appropriate