Note
- For V4.4.x, this parameter is available starting with V4.4.0.
- For V4.3.5, this parameter is available starting with V4.3.5 BP2.
Description
clog_io_isolation_mode specifies whether to enable I/O isolation for the clog disk based on whether the clog disk and data disk are independent. You can adjust the value of this parameter based on the actual deployment of the system to balance performance and resource utilization.
Privilege requirements
Query the parameter
The
systenant and all user tenants can query this parameter by using theSHOW PARAMETERSstatement or theGV$OB_PARAMETERSview.Modify the parameter
Only the
systenant can modify this parameter. User tenants cannot modify this parameter.
Attributes
| Attribute | Description |
|---|---|
| Parameter type | Int |
| Default value | 1 |
| Value range |
|
| 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 I/O isolation mode of the clog disk to non-isolation mode.
obclient> ALTER SYSTEM SET clog_io_isolation_mode=1;