Note
For V4.4.0, this parameter is available starting with V4.4.0.
Description
external_table_io_hole_size specifies the maximum distance between two consecutive I/O ranges. Ranges that exceed this value will not be 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 |
|---|---|
| Parameter type | Capacity |
| Default value | 1 MB (in bytes) |
| 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 distance between two consecutive I/O ranges to 2 MB.
obclient> ALTER SYSTEM SET external_table_io_hole_size = '2MB';
References
For more information about the maximum size of a merged range, see external_table_io_range_size.