Through the DATAGUARD did the master-slave backup, data on both sides are synchronous, but for checking IN on the v $archive_log library last record of the applied condition is always IN the MEMORY,
Not YES, how to adjust the need

CodePudding user response:

Real-time synchronous mode, the in - the memory state representatives have applied in the memory of the log, but haven't written to the data file,
Such as written to the data file, the log is yes, next to the in - the memory, until the write data file,

CodePudding user response:

reference 1st floor marssea response:

real-time synchronization mode, as the memory state representatives have applied in the memory of the log, but has not yet been written to the data file,
Such as written to the data file, the log is yes, the next to the in - the memory, until the write data file,

There is a new record, the original IN - the MEMORY will be YES, but the new record is always IN the MEMORY, where configuration has a problem.
So if an accident, the last record not written into the data file, don't lost?