Note
This view is introduced since OceanBase Database V4.2.1.
Purpose
The DBA_WR_ACTIVE_SESSION_HISTORY displays the persisted Active Session History (ASH) data of the current tenant.
Columns
Column |
Type |
Nullable? |
Description |
|---|---|---|---|
| CLUSTER_ID | NUMBER(38) | NO | The ID of the cluster. |
| TENANT_ID | NUMBER(38) | NO | The ID of the tenant. |
| SNAP_ID | NUMBER(38) | NO | The ID of the snapshot. |
| SVR_IP | VARCHAR2(46) | NO | The IP address of the OBServer node. |
| SVR_PORT | NUMBER(38) | NO | The port number of the OBServer node. |
| SAMPLE_ID | NUMBER(38) | NO | The ID of the sample. |
| SESSION_ID | NUMBER(38) | NO | The ID of the sampled session. |
| SAMPLE_TIME | TIMESTAMP(6) WITH LOCAL TIME ZONE | NO | The sampling time. |
| USER_ID | NUMBER(38) | YES | The ID of the user whose session is sampled. |
| SESSION_TYPE | NUMBER(38) | YES | The type of the session. Valid values:
|
| SESSION_STATE | VARCHAR2(7) | NO | The status of the session when being sampled. Valid values:
|
| SQL_ID | VARCHAR2(32) | YES | The SQL ID. |
| TRACE_ID | VARCHAR2(64) | YES | TRACE_ID |
| EVENT_NO | NUMBER(38) | YES | The internal number of the wait event, which is used for join query with other tables. |
| TIME_WAITED | NUMBER(38) | YES | The total wait time of the wait event, in μs. |
| P1 | NUMBER(38) | YES | The value of the first parameter of the wait event. |
| P2 | NUMBER(38) | YES | The value of the second parameter of the wait event. |
| P3 | NUMBER(38) | YES | The value of the third parameter of the wait event. |
| SQL_PLAN_LINE_ID | NUMBER(38) | YES | The ID of the SQL operator during sampling. If no operator is used, the value is NULL. |
| TIME_MODEL | NUMBER(38) | YES | The time model. |
| IN_PARSE | VARCHAR2(1) | NO | Indicates whether SQL parsing is being performed in the session during sampling. |
| IN_PL_PARSE | VARCHAR2(1) | NO | Indicates whether SQL PL parsing is being performed in the session during sampling. |
| IN_PLAN_CACHE | VARCHAR2(1) | NO | Indicates whether plan caching is being performed in the session during sampling. |
| IN_SQL_OPTIMIZE | VARCHAR2(1) | NO | Indicates whether SQL tuning is being performed in the session during sampling. |
| IN_SQL_EXECUTION | VARCHAR2(1) | NO | Indicates whether an SQL statement is being executed in the session during sampling. |
| IN_PX_EXECUTION | VARCHAR2(1) | NO | Indicates whether parallel SQL execution is being performed in the session during sampling. If the current session is in this state, it must also be in the state of SQL statement execution. |
| IN_SEQUENCE_LOAD | VARCHAR2(1) | NO | Indicates whether values are being generated for an auto-increment column or a sequence in the session during sampling. |
| IN_COMMITTING | VARCHAR2(1) | NO | Indicates whether the current sampling point is in the transaction commit phase. |
| IN_STORAGE_READ | VARCHAR2(1) | NO | Indicates whether the current sampling point is in the storage read phase. |
| IN_STORAGE_WRITE | VARCHAR2(1) | NO | Indicates whether the current sampling point is in the storage write phase. |
| IN_REMOTE_DAS_EXECUTION | VARCHAR2(1) | NO | Indicates whether the current sampling point is in the phase of remote execution by using direct access service (DAS). |
| MODULE | VARCHAR2(64) | YES | The MODULE value recorded during session sampling. |
| ACTION | VARCHAR2(64) | YES | The ACTION value recorded during session sampling. |
| CLIENT_ID | VARCHAR2(64) | YES | The CLIENT_ID value recorded during session sampling. |
| BACKTRACE | VARCHAR2(512) | YES | An auxiliary debugging field, which records the code call stack when an event occurs. |
| PLAN_ID | NUMBER(38) | YES | The plan ID of the sampled SQL statement in the plan cache, which is used to associate the sampling point with the plan. |