Note
This parameter is available starting with V4.0.0.
Description
compaction_low_thread_score specifies the number of threads for low-priority major compactions. A low-priority major compaction is a major compaction on a major SSTable.
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
The
systenant and user tenants can modify this parameter.
Attributes
| Attribute | Description |
|---|---|
| Type | Int |
| Default value | 0, which indicates that the internal default value of 6 is used. |
| Value range | [0, 100] |
| 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 number of threads for low-priority major compactions to 6.
obclient> ALTER SYSTEM SET compaction_low_thread_score= 6;