Note
This view is available starting with V2.2.77.
Purpose
This view displays statistics for all previous workareas executed on the current node of the current tenant. The statistics include the number of times workareas were processed entirely in-memory within the range of 1M to 2M, the number of one-pass executions, and so on.
Columns
| Column | Type | Nullable | Description |
|---|---|---|---|
| LOW_OPTIMAL_SIZE | NUMBER | NO | The minimum memory size for workareas in optimal mode. |
| HIGH_OPTIMAL_SIZE | NUMBER | NO | The maximum memory size for workareas 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 workareas. |
| 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 previous workareas executed on the current node of the current tenant and display the first 10 records.
obclient[SYS]> SELECT * FROM SYS.V$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