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 V2.0-3.100, the instances will be rebooted after their specifications are changed. During the reboot, services are unavailable. For instances of version V2.0-3.100 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.