If the zone of an instance is fully loaded or in other cases where the instance performance is affected, you can migrate the instance to another zone.
Note: Currently, only MySQL 5.6 and SQL Server 2008 R2 instances support instance migration across zones.
There will be 30 seconds of transient disconnection during migration across zones. Ensure that your application has a reconnection mechanism.
Migration across zones is possible only when the region of an instance has multiple zones.
Log on to the
RDS Consoleand select the target instance.
Select Basic Information in the menu.
Click Migration zone in Basic Information, as shown in the figure below.
Select a target zone on the Migrate the instance to another zones page and click OK, as shown in the figure below.