PROBLEM: I was getting Warning: ORA-16854: apply lag could not be determined in dgmgrl show configuration command. , despite my dataguard replication was working fine and no errors were in any of the ...

Overview: Below are the questions asked to a candidate with 10 years of experience in Oracle DBA and postgres . There were 2 rounds.   Round 1 :  What are your day to day activities. And what is...

If your standby database is out of sync from primary or some archive logs got deleted before it is being shipped or applied to standby ,then you can follow below method to sync standby database with p...

            Oracle Data Guard and Oracle GoldenGate are disaster recovery software used for data replication. The two software are mainly the top picks for disaster recovery. Other software like...

Below script is helpful in monitoring lag in standby database and send mail to DBAs in case the lag is increasing. For the script to work, make sure dataguard broker is enabled between primary and sta...

This articles contains useful dgmgrl commands to manage the dataguard environments. 1. Setup DG broker in the standby setup.(Run on both primary and standby) - For standalone db : ALTER SYSTEM SET dg_...

Dataguard broker is used to automate monitoring and controlling standby setups. It is very much useful, when the organization has multiple standby sites. In this article, we will see, how to enable dg...

1. What is the use of standby redolog? The Advantage of having Standby Redo Logs is that every records written into the Online RedoLogs of the Primary Database is transferred to the Standby database a...

If standby_file_management is set to AUTO, as soon as we add a datafile on primary database, same will be created automatically on standby database. But will the same valid for tempfile?? Answer is NO...

Active dataguard means, the standby database is open with read only mode, even when redo logs are getting applied in real time. Below are the benefit of using active dataguard. Reporting queries can b...