The following figure shows the approximate cost breakdown of billable items for a PolarDB cluster.
Table 1. Billing overview
Billable item | Description | Supported billing methods |
Compute nodes | Compute nodes include primary nodes and read-only nodes. The cost of compute nodes depends on the region, node specifications, and usage duration.
| Pay-as-you-go Subscription
|
Storage space | You are charged for the storage space used by items such as data files, index files, log files (online logs and archived logs), and temporary files. The cost of storage space depends on the data volume and storage duration.
| |
Backup storage space (charged only when the free quota is exceeded) | |
Note Backup storage space does not support the subscription billing method. If you select Subscription when you purchase a cluster, the billing method applies only to compute nodes. Therefore, a subscription cluster may still incur other fees, such as those for backup storage space. . For more information about the billing rules for data backup, see Pay-as-you-go rules.
|
SQL Explorer (optional) | SQL Explorer provides value-added services for your database, such as security audit and performance diagnostics. After you enable this feature, you are charged for the storage of audit logs. The cost of SQL Explorer depends on the storage capacity and retention period of audit logs.
|
Note SQL Explorer does not support the subscription billing method. If you select Subscription when you purchase a cluster, the billing method applies only to compute nodes. Therefore, a subscription cluster may still incur other fees, such as those for SQL Explorer. For more information about the billing rules for SQL Explorer, see Billing rules for SQL Explorer (optional).
|