This topic describes billable items and billing rules of PolarDB for MySQL serverless clusters.
|Backup storage space (only charged after the free quota is reached)|
|SQL Explorer (optional)|
- If a serverless cluster runs normally, its compute nodes, storage capacity, backup storage space, and SQL Explorer (optional) are billed.
- After a serverless cluster is suspended, the compute nodes are not billed. However, the storage capacity, backup storage space, and SQL Explorer (optional) remain billed.
Compute nodes are billed on an hourly basis in PCUs. One PCU is approximately equal to 1 core (maximum) and 2 GB of memory. The following table describes the billing details.
|Billable item||Region in the Chinese mainland||US (Silicon Valley)||Indonesia (Jakarta)||Germany (Frankfurt)||India (Mumbai)||US (Virginia)||Japan (Tokyo)||Philippines (Manila)||Thailand (Bangkok)||South Korea (Seoul)||Singapore||Malaysia (Kuala Lumpur)||China (Hong Kong)||UK (London)||Australia (Sydney)|
|Compute node||USD 0.0611||USD 0.0947||USD 0.1069||USD 0.1038||USD 0.0916||USD 0.0794||USD 0.0977||USD 0.1069||USD 0.1069||USD 0.0977||USD 0.1160||USD 0.1160||USD 0.1160||USD 0.1160||USD 0.1160|
The hourly fees of compute nodes are calculated in the following formula: [Unit price of PCUs × (Minimum number of read-only nodes + 1 primary node) × Minimum number of PCUs per node] to [Unit price of PCUs × (Maximum number of read-only nodes + 1 primary node) × Maximum number of PCUs per node].
For serverless clusters, a serverless architecture is used for storage. Therefore, you do not need to specify the storage capacity when you purchase clusters. The storage capacity is automatically increased when the amount of data increases. You are charged for only the storage that you use. For more information about the billing rules, see Pay-as-you-go.
For the serverless feature of a fixed-specification cluster, the storage space uses the storage of the fixed-specification cluster. For more information, see Pay-as-you-go.
Backup storage space
Serverless clusters support level-1 backup, level -2 backup, and log backup. For more information about the billing rules, see Billing rules of backup storage that exceeds the free quota.
You are charged for SQL Explorer only after the SQL Explorer feature is enabled. For more information about how to enable SQL Explorer, see ️SQL Explorer and Audit. For more information about the billing rules, see Billing rules of SQL Explorer (optional).