Note
- This view was renamed to GV$OB_ACTIVE_SESSION_HISTORY starting from V4.2.2.
- This view is available starting with V4.0.0.
Purpose
This view displays the history of active sessions.
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 collected. |
| CON_ID | NUMBER | NO | The tenant ID. |
| USER_ID | NUMBER | NO | The user ID of the session that was sampled. |
| SESSION_ID | NUMBER | NO | The ID of the session that was sampled. |
| SESSION_TYPE | VARCHAR2(10) | NO | The session type. Valid values: |
| SESSION_STATE | VARCHAR2(7) | NO | The session state. Valid values: EVENT column. |
| SQL_ID | VARCHAR2(32) | YES | The SQL ID. |
| PLAN_ID | bigint(20) | NO | The plan ID of the SQL statement 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 ID of the waiting event. This ID is used to associate the sampling point with other tables. |
| EVENT_ID | NUMBER | YES | The ID of the current waiting event.
NoteThis column is available starting with V4.2.2. |
| P1TEXT | VARCHAR2(64) | NO | The name of the first parameter of the waiting event. The name varies based on the value of the EVENT column. |
| 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 based on the value of the EVENT column. |
| 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 based on the value of the EVENT column. |
| P3 | NUMBER | NO | The value of the third parameter of the waiting event. |
| WAIT_CLASS | VARCHAR2(64) | NO | The type to which the waiting event belongs. |
| WAIT_CLASS_ID | NUMBER | NO | The ID of the type to which the waiting event belongs. This ID is used to associate the sampling point 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 ID of the SQL operator in the SQL plan at the time of sampling. |
| GROUP_ID | NUMBER | NO | The group information of the sampling point
NoteThis column is available starting with V4.2.3. |
| PLAN_HASH | NUMBER | NO | The plan_hash value of the SQL statement executed at the current sampling point.
NoteThis column is available starting with V4.2.4. |
| THREAD_ID | NUMBER | NO | The ID of the thread to which the active session belongs
NoteThis column is available starting with V4.2.4. |
| STMT_TYPE | NUMBER | NO | The SQL type of the active session
NoteThis column 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 column is available starting with V4.2.4. |
| IN_PARSE | VARCHAR2(1) | NO | Indicates whether the session is parsing an SQL statement at the time of sampling. |
| IN_PL_PARSE | VARCHAR2(1) | NO | Indicates whether the session is parsing an SQL PL statement at the time of sampling. |
| IN_PLAN_CACHE | VARCHAR2(1) | NO | Indicates whether the session is matching a plan in the plan cache at the time of sampling. |
| IN_SQL_OPTIMIZE | VARCHAR2(1) | NO | Indicates whether the session is optimizing an SQL statement at the time of sampling. |
| IN_SQL_EXECUTION | VARCHAR2(1) | NO | Indicates whether the session is executing an SQL statement at the time of sampling. |
| IN_PX_EXECUTION | VARCHAR2(1) | NO | Indicates whether the session is executing an SQL statement in parallel at the time of sampling. 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 of sampling. |
| IN_COMMITTING | VARCHAR2(1) | NO | Indicates whether the sampling point is in the transaction commit phase.
NoteThis column is available starting with V4.2.1. |
| IN_STORAGE_READ | VARCHAR2(1) | NO | Indicates whether the sampling point is in the storage read phase.
NoteThis column is available starting with V4.2.1. |
| IN_STORAGE_WRITE | VARCHAR2(1) | NO | Indicates whether the sampling point is in the storage write phase.
NoteThis column is available starting with V4.2.1. |
| IN_REMOTE_DAS_EXECUTION | VARCHAR2(1) | NO | Indicates whether the sampling point is in the DAS remote execution phase.
NoteThis column is available starting with V4.2.1. |
| IN_FILTER_ROWS | VARCHAR2(1) | NO | Indicates whether the sampling point is in the storage push-down execution phase.
NoteThis column is available starting with V4.2.2. |
| IN_RPC_ENCODE | VARCHAR2(1) | NO | The serialization operation being performed by the current SQL statement
NoteThis column is available starting with V4.2.5 in V4.2.x. |
| IN_RPC_DECODE | VARCHAR2(1) | NO | The deserialization operation being performed by the current SQL statement
NoteThis column is available starting with V4.2.5 in V4.2.x. |
| IN_CONNECTION_MGR | VARCHAR2(1) | NO | The link creation operation being performed by the current SQL statement
NoteThis column is available starting with V4.2.5 in 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 the DBMS_APPLICATION_INFO.SET_MODULE package.
NoteThis column can be set starting with V4.2.3. |
| ACTION | VARCHAR2(64) | YES | The ACTION value recorded at the sampling time, set by the DBMS_APPLICATION_INFO.SET_ACTION package.
NoteThis column can be set starting with V4.2.3. |
| CLIENT_ID | VARCHAR2(64) | YES | The CLIENT_ID value recorded at the sampling time, set by the DBMS_APPLICATION_INFO.set_identifier package.
NoteThis column can be set 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 field 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 time period in the past
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 time period in the past
NoteThis column is available starting with V4.2.2. |
| TOP_LEVEL_SQL_ID | CHAR(32) | YES | The ID of the top-level SQL statement
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 statement
NoteThis column is available starting with V4.2.2. |
| PLSQL_ENTRY_SUBPROGRAM_ID | NUMBER | YES | The Sub project ID of the top-level PL statement
NoteThis column is available starting with V4.2.2. |
| PLSQL_ENTRY_SUBPROGRAM_NAME | VARCHAR2(32) | YES | The Sub project name of the top-level PL statement
NoteThis column is available starting with V4.2.2. |
| PLSQL_OBJECT_ID | NUMBER | YES | The ID of the PL object being executed
NoteThis column is available starting with V4.2.2. |
| PLSQL_SUBPROGRAM_ID | NUMBER | YES | The ID of the PL subprogram being executed
NoteThis column is available starting with V4.2.2. |
| PLSQL_SUBPROGRAM_NAME | VARCHAR2(32) | YES | The name of the PL subprogram being executed
NoteThis column is available starting with V4.2.2. |
| BLOCKING_SESSION_ID | NUMBER | NO | If the current session is blocked, the session ID that blocks the current session is displayed. This field is effective only in lock conflict scenarios and displays the session ID 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 field 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 field 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 field 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 field is available starting with V4.2.5 BP3. |
Sample query
Query the active session history of all OBServer nodes where the tenant is located.
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)