How does Oracle Autonomous Database minimize downtime during patch updates?

Oracle Autonomous Database minimizes downtime during patch updates by utilizing rolling patch updates. This approach allows the database to apply updates sequentially to individual components or instances within a cluster without taking the entire system offline. As one instance is updated, other instances continue to handle requests, ensuring that applications remain operational and available to users throughout the process.

This method is particularly effective in maintaining high availability and reducing the likelihood of service disruption. It contrasts with strategies like shutting down services temporarily, which would cause immediate downtime; scheduling updates during off-peak hours, which may still result in some downtime during the update window; and implementing cluster failover, which involves switching operations to a standby system but does not directly relate to how patches are applied. Thus, rolling patch updates represent a significant advantage in operational efficiency and service continuity for Oracle Autonomous Database.