Note
- Since V4.x no longer supports manual control of the execution order of major compactions, this parameter is removed starting from V4.0.0.
- In V4.x, after you execute the
MAJOR FREEZEcommand, the system will use a unified compaction strategy to execute the compaction process, and you no longer need to manually control the compaction order of each zone. If an error occurs during the compaction process, you can refer to the documentation on manually controlling compactions for troubleshooting. For more information about manually controlling compactions, see Manually control a major compaction.
Description
enable_manual_merge specifies whether to enable manual major compactions.
Attributes
| Attribute | Description |
|---|---|
| Parameter type | Bool |
| Default value | False |
| Value range |
|
| Effective upon OBServer node restart | No |
Considerations
When enable_manual_merge is set to True, the alter system major freeze command does not trigger a true major compaction. Instead, you need to manually perform major compactions on each zone. For example, you can use the following commands to perform major compactions on zone1 and zone2. Additionally, the compaction order can be adjusted as needed.
alter system start merge zone='zone1';
alter system start merge zone='zone2';