Note
For V4.2.5, this parameter is available starting with V4.2.5.
Description
recover_table_concurrency specifies the maximum number of tables that can be restored in parallel during the cross-tenant table import phase of table-level restore.
Privilege requirements
Query the parameter
The
systenant and all user tenants can query the value of this parameter by using theSHOW PARAMETERSstatement or theGV$OB_PARAMETERSview.Modify the parameter
The
systenant and user tenants can modify this parameter.
Attributes
| Attribute | Description |
|---|---|
| Type | Int |
| Default value | 0, which indicates that one table can be restored by default. |
| Value range | [0, 16] |
| Modifiable | Yes. You can use the ALTER SYSTEM SET statement to modify the parameter. |
| Effective upon OBServer node restart | No. The setting takes effect immediately. |
Considerations
This parameter is used to control the parallelism of the cross-tenant table import phase of table-level restore. For more information about the table-level restore process, see Restore process.
For more information about the parallel restore feature, see Execute table-level restore.
Examples
Set the parallelism of multi-table restore for the MySQL tenant to 3.
obclient> ALTER SYSTEM SET recover_table_concurrency = 3 TENANT = 'mysql';