Note
This view is introduced since OceanBase Database V4.0.0.
Purpose
The V$OB_PS_STAT view displays the overall status of the PS cache, including the hit rate, the memory usage, and the number of cached items.
Columns
| Column | Type | Nullable? | Description |
|---|---|---|---|
| TENANT_ID | bigint(20) | NO | The ID of the tenant. |
| SVR_IP | varchar(46) | NO | The IP address of the OBServer node. |
| SVR_PORT | bigint(20) | NO | The port number of the OBServer node. |
| STMT_COUNT | bigint(20) | NO | The number of statements cached in the PS cache. |
| HIT_COUNT | bigint(20) | NO | The total number of PS cache hits. |
| ACCESS_COUNT | bigint(20) | NO | The total number of accesses to the PS cache. |
| MEM_HOLD | bigint(20) | NO | The memory occupied by the PS cache. |
Sample query
View the overall status of the PS cache for the current node in the user tenant.
obclient [oceanbase]> SELECT * FROM oceanbase.V$OB_PS_STAT;
The query result is as follows:
+-----------+----------------+----------+------------+-----------+--------------+----------+
| TENANT_ID | SVR_IP | SVR_PORT | STMT_COUNT | HIT_COUNT | ACCESS_COUNT | MEM_HOLD |
+-----------+----------------+----------+------------+-----------+--------------+----------+
| 1002 | 11.xxx.xxx.xxx | 28825 | 1 | 0 | 1 | 16384 |
+-----------+----------------+----------+------------+-----------+--------------+----------+
1 row in set