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Target customers: Big data and database customers who have self-O&M requirements for their instances. Features released: Based on the Hologres console, full-scenario self-service upgrade capabilities are provided. Supported instance types include general-purpose instances, primary/secondary instances, and virtual warehouse instances. Users can initiate an upgrade preparation process directly from the console, which will automatically check version compatibility, including the syntax and performance. Once the preparation is successful, users can proceed with the self-service hot upgrade. During the hot upgrade process, reads are not interrupted, and writes are paused. Users can monitor each step and the current status of the upgrade in the console, effectively reducing the O&M difficulty.