Note
For V4.4.0, this parameter is available starting with V4.4.0.
Description
external_table_io_range_size specifies the maximum size of a major compaction range. If two consecutive ranges are merged and the resulting range exceeds this size, they are not merged.
Privilege requirements
Query the parameter
The
systenant and all user tenants can use theSHOW PARAMETERSstatement or theGV$OB_PARAMETERSview to query this parameter.Modify the parameter
The
systenant and user tenants can modify this parameter.
Attributes
| Attribute | Description |
|---|---|
| Type | Capacity |
| Default value | 8 MB |
| Value range | [0, +∞) |
| 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. |
Examples
Set the maximum size of a major compaction range to 16 MB.
obclient> ALTER SYSTEM SET external_table_io_range_size = '16MB';
References
For more information about the maximum distance between two consecutive IO ranges, see external_table_io_hole_size.