dbParameterGroupName

The name of an existing DB parameter group or a reference to an AWS::RDS::DBParameterGroup resource created in the template. To list all of the available DB parameter group names, use the following command: `aws rds describe-db-parameter-groups --query "DBParameterGroups[].DBParameterGroupName" --output text` If any of the data members of the referenced parameter group are changed during an update, the DB instance might need to be restarted, which causes some interruption. If the parameter group contains static parameters, whether they were changed or not, an update triggers a reboot. If you don't specify a value for `DBParameterGroupName` property, the default DB parameter group for the specified engine and engine version is used.