Note
This view is available starting with V4.2.0.
Purpose
This view displays the history of load balancing tasks for the current tenant.
Columns
Column |
Type |
Nullable |
Description |
|---|---|---|---|
| JOB_ID | NUMBER(38) | NO | The ID of the load balancing task. |
| CREATE_TIME | TIMESTAMP(6) WITH LOCAL TIME ZONE | NO | The time when the task was created. |
| FINISH_TIME | TIMESTAMP(6) WITH LOCAL TIME ZONE | NO | The time when the task was completed. This includes both the successful completion time and the cancellation time. |
| BALANCE_STRATEGY | VARCHAR2(64) | NO | The name of the balancing strategy. Valid values:
|
| JOB_TYPE | VARCHAR2(64) | NO | The type of the task. Valid values:
|
| TARGET_UNIT_NUM | NUMBE | NO | The number of units in each zone after the change.
Note
|
| TARGET_PRIMARY_ZONE_NUM | NUMBER(38) | NO | The number of primary zones after the change. |
| STATUS | VARCHAR2(64) | NO | The status of the task. Valid values:
|
| COMMENT | CLOB | YES | The comment. |
| MAX_END_TIME | TIMESTAMP(6) WITH LOCAL TIME ZONE | YES | The maximum end time of the load balancing task.
NoteFor V4.3.x, this view is available starting from V4.3.4. For V4.2.x, this column is available starting from V4.2.4. |
| ZONE_UNIT_NUM_LIST | VARCHAR2(4096) | NO | The number of units in each zone of the tenant.
Note
|
| PARAMETER_LIST | CLOB | NO | The parameters of the load balancing task.
Note
|
Sample query
Query the history of load balancing tasks for the current tenant.
obclient(SYS@oracle001)[SYS]> SELECT * FROM SYS.DBA_OB_BALANCE_JOB_HISTORY;
The query result is as follows:
+--------+----------------------------+----------------------------+-------------------------+------------+-----------------+-------------------------+-----------+---------+--------------+--------------------+----------------------------------------------------------------------------------------------+
| JOB_ID | CREATE_TIME | FINISH_TIME | BALANCE_STRATEGY | JOB_TYPE | TARGET_UNIT_NUM | TARGET_PRIMARY_ZONE_NUM | STATUS | COMMENT | MAX_END_TIME | ZONE_UNIT_NUM_LIST | PARAMETER_LIST |
+--------+----------------------------+----------------------------+-------------------------+------------+-----------------+-------------------------+-----------+---------+--------------+--------------------+----------------------------------------------------------------------------------------------+
| 120112 | 16-JAN-26 17:37:21.308318 | 16-JAN-26 17:37:53.423716 | alter LS group location | LS_BALANCE | NULL | 2 | COMPLETED | NULL | NULL | z1:1,z2:1 | ls_scale_out_factor:1,enable_rebalance:true,enable_transfer:true,enable_gts_standalone:false |
+--------+----------------------------+----------------------------+-------------------------+------------+-----------------+-------------------------+-----------+---------+--------------+--------------------+----------------------------------------------------------------------------------------------+
1 row in set
References
Query the log stream-based load balancing tasks (jobs) that are being executed for the current tenant: DBA_OB_BALANCE_JOBS
Query the log stream-based load balancing tasks (tasks) for the current tenant:
Query the tablet-based load balancing tasks (tasks) for the current tenant:
Query the transfer partition tasks (tasks) for the current tenant:
For more information about data load balancing, see Data load balancing.