Note
This view is available starting with V1.4.
Purpose
The V$SESSION_WAIT_HISTORY view displays the details of the current wait events for all sessions on the current node, including the last 10 wait events.
Columns
| Column | Type | Nullable | Description |
|---|---|---|---|
| SID | bigint(20) | NO | For V4.3.x:
|
| CON_ID | bigint(20) | NO | Tenant ID |
| SVR_IP | varchar(46) | NO | Server IP address |
| SVR_PORT | bigint(20) | NO | Server port |
| SEQ# | bigint(20) | NO | Wait event sequence number |
| EVENT# | bigint(20) | NO | Wait event number |
| EVENT | varchar(64) | NO | Wait event name |
| P1TEXT | varchar(64) | NO | Description of parameter 1 of the wait event |
| P1 | bigint(20) unsigned | NO | Value of parameter 1 of the wait event |
| P2TEXT | varchar(64) | NO | Description of parameter 2 of the wait event |
| P2 | bigint(20) unsigned | NO | Value of parameter 2 of the wait event |
| P3TEXT | varchar(64) | NO | Description of parameter 3 of the wait event |
| P3 | bigint(20) unsigned | NO | Value of parameter 3 of the wait event |
| WAIT_TIME | double | NO | Wait time of the wait event, in hundredths of a second |
| WAIT_TIME_MICRO | bigint(20) | NO | Wait time of the wait event, in microseconds |
| TIME_SINCE_LAST_WAIT_MICRO | bigint(20) | NO | Time elapsed since the last wait ended, in microseconds |
Sample query
Query the details of the current wait events for all sessions on the current node, including the last 10 wait events.
obclient [oceanbase]> SELECT * FROM oceanbase.V$SESSION_WAIT_HISTORY LIMIT 1\G
The query result is as follows:
*************************** 1. row ***************************
SID: 3221608040
CON_ID: 1
SVR_IP: xx.xx.xx.xx
SVR_PORT: 2882
SEQ#: 1
EVENT#: 0
EVENT:
P1TEXT:
P1: 0
P2TEXT:
P2: 0
P3TEXT:
P3: 0
WAIT_TIME: 174572146997.0574
WAIT_TIME_MICRO: 1745721469970574
TIME_SINCE_LAST_WAIT_MICRO: 0