Note
This view is available starting with V2.2.77.
Purpose
This view displays statistics for all work areas executed on all nodes of the current tenant, such as the number of times full in-memory processing occurred within the 1M to 2M range, the number of one-pass executions, and so on.
Columns
| Column | Type | Nullable | Description |
|---|---|---|---|
| LOW_OPTIMAL_SIZE | NUMBER | NO | The minimum memory size for the workarea in optimal mode. |
| HIGH_OPTIMAL_SIZE | NUMBER | NO | The maximum memory size for the workarea in optimal mode. |
| OPTIMAL_EXECUTIONS | NUMBER | NO | The number of executions in optimal mode within the lowest and highest ranges. |
| ONEPASS_EXECUTIONS | NUMBER | NO | The number of one-pass executions within the lowest and highest ranges. |
| MULTIPASSES_EXECUTIONS | NUMBER | NO | The number of multi-pass executions within the lowest and highest ranges. |
| TOTAL_EXECUTIONS | NUMBER | NO | The total number of executions for the workarea. |
| CON_ID | NUMBER | NO | The tenant ID. |
| SVR_IP | VARCHAR2(46) | NO | The server IP address. |
| SVR_PORT | NUMBER | NO | The server port number. |
Sample query
Query the statistics for all work areas executed on all nodes of the current tenant and display the first 10 records.
obclient[SYS]> SELECT * FROM SYS.GV$SQL_WORKAREA_HISTOGRAM WHERE ROWNUM<= 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 | 11899 | 0 | 0 | 11899 | 1004 | 172.xx.xxx.xxx | 2882 |
| 1048576 | 2097152 | 0 | 0 | 0 | 0 | 1004 | 172.xx.xxx.xxx | 2882 |
| 2097152 | 3145728 | 29 | 0 | 0 | 29 | 1004 | 172.xx.xxx.xxx | 2882 |
| 3145728 | 4194304 | 0 | 0 | 0 | 0 | 1004 | 172.xx.xxx.xxx | 2882 |
| 4194304 | 5242880 | 0 | 0 | 0 | 0 | 1004 | 172.xx.xxx.xxx | 2882 |
| 5242880 | 6291456 | 0 | 0 | 0 | 0 | 1004 | 172.xx.xxx.xxx | 2882 |
| 6291456 | 7340032 | 0 | 0 | 0 | 0 | 1004 | 172.xx.xxx.xxx | 2882 |
| 7340032 | 8388608 | 0 | 0 | 0 | 0 | 1004 | 172.xx.xxx.xxx | 2882 |
| 8388608 | 9437184 | 29 | 0 | 0 | 29 | 1004 | 172.xx.xxx.xxx | 2882 |
| 9437184 | 10485760 | 0 | 0 | 0 | 0 | 1004 | 172.xx.xxx.xxx | 2882 |
+------------------+-------------------+--------------------+--------------------+------------------------+------------------+--------+----------------+----------+
10 rows in set