**To apply pending maintenance actions** The following ``apply-pending-maintenance-action`` example applies the pending maintenance actions for a DB cluster. :: aws rds apply-pending-maintenance-action \ --resource-identifier arn:aws:rds:us-east-1:123456789012:cluster:my-db-cluster \ --apply-action system-update \ --opt-in-type immediate Output:: { "ResourcePendingMaintenanceActions": { "ResourceIdentifier": "arn:aws:rds:us-east-1:123456789012:cluster:my-db-cluster", "PendingMaintenanceActionDetails": [ { "Action": "system-update", "OptInStatus": "immediate", "CurrentApplyDate": "2021-01-23T01:07:36.100Z", "Description": "Upgrade to Aurora PostgreSQL 3.3.2" } ] } } For more information, see `Maintaining a DB instance <https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_UpgradeDBInstance.Maintenance.html>`__ in the *Amazon RDS User Guide* and `Maintaining an Amazon Aurora DB cluster <https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/USER_UpgradeDBInstance.Maintenance.html>`__ in the *Amazon Aurora User Guide*.