Billing

This section describes all billing items of serverless DB instances.

**Table 1** Billing description
Billing Item	Billing Method
DB instance	You are billed for the selected instance specifications. The billing starts immediately after the instance is purchased. For details, see Billing Rules.
Storage space	You do not need to select storage when purchasing a DB instance. Storage will be scaled up dynamically based on how much data needs to be stored. It is billed hourly on a pay-per-use basis.
Backup space	GaussDB provides free backup storage equal to the amount of your used storage space. If the backup space usage exceeds 100% of your provisioned database storage, the additional part will be billed based on the backup pricing.
Public network traffic	GaussDB(for MySQL) instances are accessible from both private and public networks, but the traffic from public networks is billed.

The billing unit is TCU. 1 TCU is approximately equal to 1 vCPU and 2 GB of memory. The detailed fees are as follows:

**Table 2** Billing rules (USD/TCU/hour)
Region	Unit Price (USD/TCU/Hour)
CN North-Beijing4 and CN East-Shanghai1	0.063
AP-Singapore	0.19

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