Purpose
The V$SESSION_WAIT view provides information about the current or last wait events of all sessions on the current OBServer node, such as the event name and the amount of time spent on waiting.
Note
This view is introduced since OceanBase Database V1.4.
Columns
| Column | Type | Nullable? | Description |
|---|---|---|---|
| SID | NUMBER | NO | The ID of the session. |
| CON_ID | NUMBER | NO | The ID of the tenant. |
| SVR_IP | VARCHAR2(46) | NO | The IP address of the server. |
| SVR_PORT | NUMBER(38) | NO | The port number of the server. |
| EVENT | VARCHAR2(64) | NO | The name of the wait event. |
| P1TEXT | VARCHAR2(64) | NO | The description of the first parameter of the wait event. |
| P1 | NUMBER | NO | The value of the first parameter of the wait event. |
| P2TEXT | VARCHAR2(64) | NO | The description of the second parameter of the wait event. |
| P2 | NUMBER | NO | The value of the second parameter of the wait event. |
| P3TEXT | VARCHAR2(64) | NO | The description of the third parameter of the wait event. |
| P3 | NUMBER(38) | NO | The value of the third parameter of the wait event. |
| WAIT_CLASS_ID | NUMBER | NO | The ID of the class to which the wait event belongs. |
| WAIT_CLASS# | NUMBER | NO | The sequence number of the class to which the wait event belongs. |
| WAIT_CLASS | VARCHAR2(64) | NO | The name of the class to which the wait event belongs. |
| STATE | VARCHAR2(19) | NO | The status of the current wait event. Valid values:Waiting: The session is waiting for the event.Waited unknown time: The time information cannot be obtained because timed_statistics is set to false. In other words, a wait event has occurred but lasted only for a very short period.Wait short time: A wait event has occurred but lasted for less than one unit of time, and therefore was not recorded.Waited known time: If the session has obtained the required resources after the wait, it will switch from the Waiting state to this state. |
| WAIT_TIME_MICRO | NUMBER | NO | The wait time in microseconds. It indicates the elapsed wait time if the session is in waiting state and indicates the total wait time of the last wait if the session is not in the waiting state. |
| TIME_REMAINING_MICRO | NUMBER | NO | 0: The session is waiting for the current event.-1: The wait time of the last wait is shorter than one measurement unit, and the session is not in Waiting state.-2: Time statistics collection is disabled, and the session is not in Waiting state. |
| TIME_SINCE_LAST_WAIT_MICRO | NUMBER | NO | The amount of time in microseconds elapsed since the end of the last wait. The value is 0 if the session is in Waiting state. |
