Note
This view is available starting with V2.2.77.
Purpose
This view displays statistics of all previous workarea executions on the current node of the current tenant, such as the number of times operations were performed in the in-memory mode in the range of 1M to 2M and the number of one-pass executions.
Columns
Column |
Type |
Nullable |
Description |
|---|---|---|---|
| LOW_OPTIMAL_SIZE | bigint(20) | NO | The minimum memory size of the workarea in optimal mode. |
| HIGH_OPTIMAL_SIZE | bigint(20) | NO | The maximum memory size of the workarea in optimal mode. |
| OPTIMAL_EXECUTIONS | bigint(20) | NO | The number of executions of the workarea in optimal mode in the range of the minimum and maximum sizes. |
| ONEPASS_EXECUTIONS | bigint(20) | NO | The number of one-pass executions of the workarea in the range of the minimum and maximum sizes. |
| MULTIPASSES_EXECUTIONS | bigint(20) | NO | The number of multi-pass executions of the workarea in the range of the minimum and maximum sizes. |
| TOTAL_EXECUTIONS | bigint(20) | NO | The total number of executions of the workarea. |
| CON_ID | bigint(20) | NO | The tenant ID. |
| SVR_IP | varchar(46) | NO | The IP address of the server. |
| SVR_PORT | bigint(20) | NO | The port number of the server. |
Sample query
Query the statistics of all previous workarea executions on the current node of the current tenant and display the first 10 records.
obclient[oceanbase]> SELECT * FROM oceanbase.V$SQL_WORKAREA_HISTOGRAM LIMIT 10;
The query result is as follows:
+------------------+-------------------+--------------------+--------------------+------------------------+------------------+--------+----------------+----------+
| LOW_OPTIMAL_SIZE | HIGH_OPTIMAL_SIZE | OPTIMAL_EXECUTIONS | ONEPASS_EXECUTIONS | MULTIPASSES_EXECUTIONS | TOTAL_EXECUTIONS | CON_ID | SVR_IP | SVR_PORT |
+------------------+-------------------+--------------------+--------------------+------------------------+------------------+--------+----------------+----------+
| 0 | 1048576 | 12018 | 0 | 0 | 12018 | 1002 | 172.xx.xxx.xxx | 2882 |
| 1048576 | 2097152 | 0 | 0 | 0 | 0 | 1002 | 172.xx.xxx.xxx | 2882 |
| 2097152 | 3145728 | 11 | 0 | 0 | 11 | 1002 | 172.xx.xxx.xxx | 2882 |
| 3145728 | 4194304 | 0 | 0 | 0 | 0 | 1002 | 172.xx.xxx.xxx | 2882 |
| 4194304 | 5242880 | 0 | 0 | 0 | 0 | 1002 | 172.xx.xxx.xxx | 2882 |
| 5242880 | 6291456 | 0 | 0 | 0 | 0 | 1002 | 172.xx.xxx.xxx | 2882 |
| 6291456 | 7340032 | 0 | 0 | 0 | 0 | 1002 | 172.xx.xxx.xxx | 2882 |
| 7340032 | 8388608 | 0 | 0 | 0 | 0 | 1002 | 172.xx.xxx.xxx | 2882 |
| 8388608 | 9437184 | 11 | 0 | 0 | 11 | 1002 | 172.xx.xxx.xxx | 2882 |
| 9437184 | 10485760 | 0 | 0 | 0 | 0 | 1002 | 172.xx.xxx.xxx | 2882 |
+------------------+-------------------+--------------------+--------------------+------------------------+------------------+--------+----------------+----------+
10 rows in set