Changefeed Billing
TiDB Cloud measures the capacity of changefeeds in TiCDC Replication Capacity Units (RCUs). When you create the first changefeed for a cluster, TiDB Cloud automatically sets up TiCDC RCUs for you, and you will be charged for these TiCDC RCUs. All changefeeds that are created in a single cluster share the same TiCDC RCUs.
Number of TiCDC RCUs
For each TiDB cluster, the number of TiCDC RCUs is set up by TiDB Cloud according to the total vCPU count of all TiKV nodes in your cluster as follows:
| Total vCPUs of all TiKV nodes | Number of RCUs |
|---|---|
| < 48 | 16 |
| >= 48, and < 120 | 24 |
| >= 120, and <= 168 | 32 |
| > 168 | 40 |
Price
To learn about the supported regions and the price of TiDB Cloud for each TiCDC RCU, see Changefeed Cost.
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