Note
- This view was renamed to GV$OB_ACTIVE_SESSION_HISTORY starting with V4.2.2.
- This view is available starting with V4.0.0.
Purpose
The GV$ACTIVE_SESSION_HISTORY view displays the active session history of all OBServer nodes in the current tenant.
Columns
| Column | Type | Nullable | Description |
|---|---|---|---|
| SVR_IP | VARCHAR2(46) | NO | The IP address of the server to which the sample belongs. |
| SVR_PORT | NUMBER | NO | The port number of the server to which the sample belongs. |
| SAMPLE_ID | NUMBER | NO | The unique ID of the sample. |
| SAMPLE_TIME | TIMESTAMP(6) | NO | The time when the sample was taken. |
| CON_ID | NUMBER | NO | The tenant ID. |
| USER_ID | NUMBER | NO | The ID of the user of the session being sampled. |
| SESSION_ID | NUMBER | NO | The ID of the session being sampled. For V4.2.x:
|
| SESSION_TYPE | VARCHAR2(10) | NO | The session type. |
| SESSION_STATE | VARCHAR2(7) | NO | The session state. EVENT field. |
| SQL_ID | VARCHAR2(32) | YES | The SQL ID. |
| PLAN_ID | bigint(20) | NO | The plan ID of the sampled SQL in the plan cache. This ID is used to associate the sampling point with the plan. |
| TRACE_ID | VARCHAR2(64) | YES | The trace ID of the operator. |
| EVENT | VARCHAR2(64) | NO | The description of the waiting event. |
| EVENT_NO | NUMBER | NO | The internal number of the waiting event. This number is used to associate the waiting event with other tables. |
| EVENT_ID | NUMBER | YES | The ID of the current waiting event.
NoteThis field is available starting with V4.2.2. |
| P1TEXT | VARCHAR2(64) | NO | The name of the first parameter of the waiting event. The name varies depending on the waiting event. |
| P1 | NUMBER | NO | The value of the first parameter of the waiting event. |
| P2TEXT | VARCHAR2(64) | NO | The name of the second parameter of the waiting event. The name varies depending on the waiting event. |
| P2 | NUMBER | NO | The value of the second parameter of the waiting event. |
| P3TEXT | VARCHAR2(64) | NO | The name of the third parameter of the waiting event. The name varies depending on the waiting event. |
| P3 | NUMBER | NO | The value of the third parameter of the waiting event. |
| WAIT_CLASS | VARCHAR2(64) | NO | The type of the waiting event. |
| WAIT_CLASS_ID | NUMBER | NO | The ID of the type of the waiting event. This ID is used to associate the waiting event with other tables. |
| TIME_WAITED | NUMBER | NO | The total waiting time of the waiting event, in microseconds (us). |
| SQL_PLAN_LINE_ID | NUMBER | YES | The number of the SQL operator in the SQL plan at the time the sample was taken. |
| GROUP_ID | NUMBER | NO | The group information of the sampling point
NoteThis field is available starting with V4.2.3. |
| PLAN_HASH | NUMBER | NO | The plan_hash of the current SQL statement
NoteThis field is available starting with V4.2.4. |
| THREAD_ID | NUMBER | NO | The ID of the thread to which the current active session belongs
NoteThis field is available starting with V4.2.4. |
| STMT_TYPE | NUMBER | NO | The SQL type of the current active session
NoteThis field is available starting with V4.2.4. |
| TIME_MODEL | NUMBER | NO | The time model information, which is a collection of all IN_XXX fields (such as IN_PARSE and IN_PL_PARSE).
NoteThis field is available starting with V4.2.4. |
| IN_PARSE | VARCHAR2(1) | NO | Indicates whether the session is parsing SQL at the time the sample was taken. |
| IN_PL_PARSE | VARCHAR2(1) | NO | Indicates whether the session is parsing SQL PL at the time the sample was taken. |
| IN_PLAN_CACHE | VARCHAR2(1) | NO | Indicates whether the session is matching a plan in the plan cache at the time the sample was taken. |
| IN_SQL_OPTIMIZE | VARCHAR2(1) | NO | Indicates whether the session is optimizing the SQL statement at the time the sample was taken. |
| IN_SQL_EXECUTION | VARCHAR2(1) | NO | Indicates whether the session is executing the SQL statement at the time the sample was taken. |
| IN_PX_EXECUTION | VARCHAR2(1) | NO | Indicates whether the session is executing the SQL statement in parallel at the time the sample was taken. If the session is in this state, it must also be in the IN_SQL_EXECUTION state. |
| IN_SEQUENCE_LOAD | VARCHAR2(1) | NO | Indicates whether the session is fetching values from an auto-increment column or a sequence at the time the sample was taken. |
| IN_COMMITTING | VARCHAR2(1) | NO | Indicates whether the sampling point is in the transaction commit stage.
NoteThis field is available starting with V4.2.1. |
| IN_STORAGE_READ | VARCHAR2(1) | NO | Indicates whether the sampling point is in the storage read stage.
NoteThis field is available starting with V4.2.1. |
| IN_STORAGE_WRITE | VARCHAR2(1) | NO | Indicates whether the current sampling point is in the storage write stage
NoteThis column is available starting with V4.2.1. |
| IN_REMOTE_DAS_EXECUTION | VARCHAR2(1) | NO | Indicates whether the current sampling point is in the DAS remote execution stage
NoteThis column is available starting with V4.2.1. |
| IN_FILTER_ROWS | VARCHAR2(1) | NO | Indicates whether the current sampling point is in the storage pushdown execution stage
NoteThis column is available starting with V4.2.2. |
| IN_RPC_ENCODE | VARCHAR2(1) | NO | Indicates the current serialization operation being performed by the SQL
NoteThis column is available starting with V4.2.5 for V4.2.x. |
| IN_RPC_DECODE | VARCHAR2(1) | NO | Indicates the current deserialization operation being performed by the SQL
NoteThis column is available starting with V4.2.5 for V4.2.x. |
| IN_CONNECTION_MGR | VARCHAR2(1) | NO | Indicates the current link creation operation being performed by the SQL
NoteThis column is available starting with V4.2.5 for V4.2.x. |
| PROGRAM | VARCHAR2(64) | YES | The name of the program being executed at the current sampling point:
NoteThis column is available starting with V4.2.2. |
| MODULE | VARCHAR2(64) | YES | The MODULE value recorded at the sampling time, set by using the DBMS_APPLICATION_INFO.SET_MODULE package.
NoteThis column is available starting with V4.2.3. |
| ACTION | VARCHAR2(64) | YES | The ACTION value recorded at the sampling time, set by using the DBMS_APPLICATION_INFO.SET_ACTION package.
NoteThis column is available starting with V4.2.3. |
| CLIENT_ID | VARCHAR2(64) | YES | The CLIENT_ID value recorded at the sampling time, set by using the DBMS_APPLICATION_INFO.set_identifier package.
NoteThis column is available starting with V4.2.3. |
| BACKTRACE | VARCHAR2(512) | YES | An auxiliary debugging field used to record the code call stack at the time of the event. The value of this column is always NULL |
| TM_DELTA_TIME | NUMBER | YES | The time interval for calculating the time model, in microseconds
NoteThis column is available starting with V4.2.2. |
| TM_DELTA_CPU_TIME | NUMBER | YES | The amount of time spent on the CPU during the TM_DELTA_TIME period
NoteThis column is available starting with V4.2.2. |
| TM_DELTA_DB_TIME | NUMBER | YES | The amount of time spent on database calls during the TM_DELTA_TIME period
NoteThis column is available starting with V4.2.2. |
| TOP_LEVEL_SQL_ID | CHAR(32) | YES | The ID of the top-level SQL
NoteThis column is available starting with V4.2.2. |
| IN_PLSQL_COMPILATION | VARCHAR2(1) | NO | The PL compilation status: Y/N
NoteThis column is available starting with V4.2.2. |
| IN_PLSQL_EXECUTION | VARCHAR2(1) | NO | The PL execution status: Y/N
NoteThis column is available starting with V4.2.2. |
| PLSQL_ENTRY_OBJECT_ID | NUMBER | YES | The OBJECT ID of the top-level PL
NoteThis column is available starting with V4.2.2. |
| PLSQL_ENTRY_SUBPROGRAM_ID | NUMBER | YES | The subproject ID of the top-level PL
NoteThis column is available starting with V4.2.2. |
| PLSQL_ENTRY_SUBPROGRAM_NAME | VARCHAR2(32) | YES | The subproject name of the top-level PL
NoteThis column is available starting with V4.2.2. |
| PLSQL_OBJECT_ID | NUMBER | YES | The ID of the PL object currently being executed
NoteThis column is available starting with V4.2.2. |
| PLSQL_SUBPROGRAM_ID | NUMBER | YES | The ID of the PL subprogram currently being executed.
NoteThis column is available starting with V4.2.2. |
| PLSQL_SUBPROGRAM_NAME | VARCHAR2(32) | YES | The name of the PL subprogram currently being executed.
NoteThis column is available starting with V4.2.2. |
| BLOCKING_SESSION_ID | NUMBER | NO | If the current session is blocked, the ID of the session that blocks the current session. This column is effective only in lock conflict scenarios and displays the ID of the session that holds the lock.
Note
|
| TABLET_ID | NUMBER | NO | The ID of the tablet that is being processed by the current SQL statement.
Note
|
| PROXY_SID | NUMBER | NO | The ID of the proxy session.
Note
|
| TX_ID | NUMBER | NO | The ID of the current transaction.
Note
|
| DELTA_READ_IO_REQUESTS | NUMBER | NO | The number of reads between two sampling intervals.
NoteFor V4.2.x, this column is available starting with V4.2.5 BP3. |
| DELTA_READ_IO_BYTES | NUMBER | NO | The total size of files read between two sampling intervals.
NoteFor V4.2.x, this column is available starting with V4.2.5 BP3. |
| DELTA_WRITE_IO_REQUESTS | NUMBER | NO | The number of writes between two sampling intervals.
NoteFor V4.2.x, this column is available starting with V4.2.5 BP3. |
| DELTA_WRITE_IO_BYTES | NUMBER | NO | The total size of files written between two sampling intervals.
NoteFor V4.2.x, this column is available starting with V4.2.5 BP3. |
Sample query
Query the active session history of all OBServer nodes in the current tenant.
obclient [SYS]> SELECT * FROM SYS.GV$ACTIVE_SESSION_HISTORY WHERE ROWNUM = 1\G
The query result is as follows:
*************************** 1. row ***************************
SVR_IP: xx.xx.xx.xx
SVR_PORT: 2882
SAMPLE_ID: 1917870
SAMPLE_TIME: 04-MAR-25 10.39.57.526052 AM
CON_ID: 1004
USER_ID: 0
SESSION_ID: -9223372036854724899
SESSION_TYPE: BACKGROUND
SESSION_STATE: ON CPU
SQL_ID: NULL
PLAN_ID: 0
TRACE_ID: NULL
EVENT: NULL
EVENT_NO: 0
EVENT_ID: NULL
P1TEXT: NULL
P1: 0
P2TEXT: NULL
P2: 0
P3TEXT: NULL
P3: 0
WAIT_CLASS: OTHER
WAIT_CLASS_ID: 100
TIME_WAITED: 0
SQL_PLAN_LINE_ID: NULL
GROUP_ID: 0
PLAN_HASH: NULL
THREAD_ID: 82484
STMT_TYPE: NULL
TIME_MODEL: 0
IN_PARSE: N
IN_PL_PARSE: N
IN_PLAN_CACHE: N
IN_SQL_OPTIMIZE: N
IN_SQL_EXECUTION: N
IN_PX_EXECUTION: N
IN_SEQUENCE_LOAD: N
IN_COMMITTING: N
IN_STORAGE_READ: N
IN_STORAGE_WRITE: N
IN_REMOTE_DAS_EXECUTION: N
IN_FILTER_ROWS: N
IN_RPC_ENCODE: N
IN_RPC_DECODE: N
IN_CONNECTION_MGR: N
PROGRAM: T1004_LogService
MODULE: LogRestoreService
ACTION: RemoteLogWriter
CLIENT_ID: NULL
BACKTRACE: NULL
TM_DELTA_TIME: 1017444
TM_DELTA_CPU_TIME: 1017444
TM_DELTA_DB_TIME: 1017444
TOP_LEVEL_SQL_ID: NULL
IN_PLSQL_COMPILATION: N
IN_PLSQL_EXECUTION: N
PLSQL_ENTRY_OBJECT_ID: NULL
PLSQL_ENTRY_SUBPROGRAM_ID: NULL
PLSQL_ENTRY_SUBPROGRAM_NAME: NULL
PLSQL_OBJECT_ID: NULL
PLSQL_SUBPROGRAM_ID: NULL
PLSQL_SUBPROGRAM_NAME: NULL
BLOCKING_SESSION_ID: NULL
TABLET_ID: NULL
PROXY_SID: -9223372036854724899
TX_ID: NULL
DELTA_READ_IO_REQUESTS: 0
DELTA_READ_IO_BYTES: 0
DELTA_WRITE_IO_REQUESTS: 0
DELTA_WRITE_IO_BYTES: 0
1 row in set (0.124 sec)
References
- Query the active session history of all OBServer nodes in the current tenant: GV$OB_ACTIVE_SESSION_HISTORY
- Query the active session history of the current OBServer node in the current tenant: V$OB_ACTIVE_SESSION_HISTORY