How to verify normal synchronization in dataguard

How to verify whether the synchronization is normal in dataguard? for this question, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

1 、

The easiest way is to check whether the latest archive log is apply, and synchronize normally if applied is yes.

Main library sqlplus > alter system switch logfile

Repository sqlplus > select SEQUENCE#,applied,FIRST_TIME,NEXT_TIME from v$archived_log order by 1 desc

2 、

Whether the BLOCK# of the LNS process in the main library changes, and the slave database checks whether the BLOCK# of the RFS process changes. If the BLOCK# changes, it synchronizes normally.

Main library sqlplus > select PROCESS,STATUS,SEQUENCE#,BLOCK# from V$MANAGED_STANDBY where process='LNS'

Prepare the library sqlplus > select PROCESS,CLIENT_PROCESS,SEQUENCE#,BLOCK# from V$MANAGED_STANDBY where PROCESS='RFS'

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