Standby Database

Check Oracle Data Guard Standby Synchronization Status Purpose Is the physical standby caught up with the primary? The fastest first answer is a pair of numbers: the log sequence the primary is writing now, and the newest log sequence the standby has applied. If the two are close, redo is flowing and being applied. If …

How to Check Oracle Database Role Using V$DATABASE View Purpose The SQL query SELECT database_role FROM v$database is a fundamental Oracle Database command used to determine the current operational role of a database instance. This query is essential for Database Administrators (DBAs) working with Oracle Data Guard …

How to Disable and Enable Oracle Archive Log Destinations Purpose Coordinating redo shipping around a standby maintenance window is an operational task every Data Guard DBA runs into: the standby is about to go down for patching, storage work, or a network change, and the primary database needs to keep generating and …

Check Missing Archive Logs in Oracle Data Guard Standby Database Purpose This SQL query helps database administrators identify missing archive logs on an Oracle Data Guard standby database. When archive logs fail to transfer from the primary to the standby database, it creates gaps that prevent proper synchronization. …

How to Cancel Oracle Data Guard Managed Recovery Overview The ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL command stops the Managed Recovery Process (MRP) on an Oracle Data Guard physical standby database. This command is essential when you need to perform maintenance operations, open the database in …

Removing Standby Database Apply Delay in Oracle Data Guard Purpose This script removes the apply delay from an Oracle Data Guard physical standby database. Apply delays are safety features that create a time lag between when redo data arrives at the standby database and when it is applied, protecting against corrupted …

Oracle Data Guard Standby Database Startup Commands Oracle Data Guard standby database startup commands enable database administrators to initialize and maintain physical standby databases that provide disaster recovery and high availability for production systems. These three essential commands work together to bring …