Note
For V3.1.4, this parameter is available starting with V3.1.4.
Description
The datafile_next parameter specifies the growth step of automatic disk file expansion.
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
Only the
systenant can modify this parameter. User tenants cannot modify this parameter.
Attributes
Attribute |
Description |
|---|---|
| Parameter type | Capacity |
| Default value | 0 |
| Value range | [0M, +∞) |
| 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
datafile_next defaults to 0, which means automatic growth is disabled. To enable it, you need to set a new value:
- If
datafile_nextis set to a value less than 1G, the value will be min (1G, datafile_maxsize * 10%). - If
datafile_nextis set to a value greater than 1G, the value will be min (datafile_next, remaining disk space).
Examples
Set the growth step of automatic disk file expansion to 10G.
obclient> ALTER SYSTEM SET datafile_next = '10G';