Note
This view is introduced since OceanBase Database V4.0.0.
Purpose
The V$OB_PS_STAT view displays the overall status of the PS cache, including the hit rate, the memory usage, and the number of cached items.
Columns
Column |
Type |
Nullable? |
Description |
|---|---|---|---|
| SVR_IP | VARCHAR2(46) | NO | The IP address of the OBServer node. |
| SVR_PORT | NUMBER(38) | NO | The port number of the OBServer node. |
| STMT_COUNT | NUMBER(38) | NO | The number of statements cached in the PS cache. |
| HIT_COUNT | NUMBER(38) | NO | The total number of PS cache hits. |
| ACCESS_COUNT | NUMBER(38) | NO | The total number of accesses to the PS cache. |
| MEM_HOLD | NUMBER(38) | NO | The memory occupied by the PS cache. |
Sample query
In the user tenant, view the overall status of the PS cache on the current node in the tenant.
obclient [SYS]> SELECT * FROM SYS.V$OB_PS_STAT;
The query result is as follows:
+-----------+----------------+----------+------------+-----------+--------------+----------+
| TENANT_ID | SVR_IP | SVR_PORT | STMT_COUNT | HIT_COUNT | ACCESS_COUNT | MEM_HOLD |
+-----------+----------------+----------+------------+-----------+--------------+----------+
| 1004 | 11.xxx.xxx.xxx | 28825 | 1 | 0 | 1 | 16384 |
+-----------+----------------+----------+------------+-----------+--------------+----------+
1 row in set