Note
This parameter is available starting with V2.2.50.
Description
px_task_size specifies the amount of data processed by each task in the SQL parallel query engine.
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 |
|---|---|
| Type | Capacity |
| Default value | 2 MB. The default unit is MB. You must specify the unit when you configure this parameter. |
| Value range | [2 MB, +∞) |
| 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 amount of data processed by each task in the SQL parallel query engine to 2 MB.
obclient> ALTER SYSTEM SET px_task_size ='2M';