Are My GaussDB Instances Still Available During Storage Scale-up and Instance Specification Change?

Currently, you can scale up storage space and change the CPU and memory specifications of a GaussDB instance.

• When storage space scale-up, GaussDB instances are available and services are not interrupted. However, you cannot delete or reboot the instances that are being scaled.
• During CPU and memory specification change, the network is intermittently disconnected for one or two times in seconds. A failover may occur during this period and services may be briefly interrupted.

  For DB instances earlier than 3.100, the instances will be rebooted after their specifications are changed. During the reboot, services are unavailable. For instances of version 3.100 or later, no reboot is required, which greatly reduces the impact of intermittent disconnections. To prevent service interruption, perform the operation during off-peak hours. Rebooting a DB instance will clear the cached memory in it. You are advised to reboot it during off-peak hours.