Note
- Due to internal optimization, for V4.4.2, this parameter is available starting with V4.4.2 BP1. Subsequent schema multi-version history data recycling is controlled by the scheduled task
SCHEDULED_RECYCLE_SCHEMA_HISTORY. The task scheduling interval can be modified using theSET ATTRIBUTEsubprogram inDBMS_SCHEDULER. - For V1.4, this parameter is available starting with V1.4.
Description
schema_history_recycle_interval specifies the interval at which the system performs the multi-version record recycling task for schema.
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 |
|---|---|
| Type | Time |
| Default value | 10m, which indicates 10 minutes |
| Value range | [0s, +∞)
Note
|
| 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 interval at which the system performs the multi-version record recycling task for schema to 10 minutes.
obclient> ALTER SYSTEM SET schema_history_recycle_interval = '10m';