Note
This view is available starting with V4.2.2.
Purpose
The V$OB_ACTIVE_SESSION_HISTORY 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 taken. |
| CON_ID | NUMBER | NO | The tenant ID. |
| USER_ID | NUMBER | NO | The ID of the user of the session that was sampled. |
| SESSION_ID | NUMBER | NO | The ID of the session that was sampled. For V4.2.x:
|
| SESSION_TYPE | VARCHAR2(10) | NO | The session type.
|
| SESSION_STATE | VARCHAR2(7) | NO | The session state.
|
| SQL_ID | VARCHAR2(32) | NO | The SQL ID. |
| PLAN_ID | NUMBER | NO | The plan ID of the sampled SQL in the PLAN CACHE, which is used to associate the sampling point with the plan. |
| TRACE_ID | VARCHAR2(64) | NO | 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, which is used to associate the sampling point with other tables. |
| EVENT_ID | NUMBER | NO | The ID of the current waiting event. |
| P1TEXT | VARCHAR2(64) | NO | The name of the first parameter of the waiting event. This name varies depending on the EVENT value. |
| 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. This name varies depending on the EVENT value. |
| 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. This name varies depending on the EVENT value. |
| 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, which 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 | NO | The line number 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 corresponding to the executed SQL command.
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 data from 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 was parsing SQL at the time of sampling. |
| IN_PL_PARSE | VARCHAR2(1) | NO | Indicates whether the session was parsing SQL PL at the time of sampling. |
| IN_PLAN_CACHE | VARCHAR2(1) | NO | Indicates whether the session is performing a plan cache match during the sampling. |
| IN_SQL_OPTIMIZE | VARCHAR2(1) | NO | Indicates whether the session is performing SQL parsing optimization during the sampling. |
| IN_SQL_EXECUTION | VARCHAR2(1) | NO | Indicates whether the session is performing SQL execution during the sampling. |
| IN_PX_EXECUTION | VARCHAR2(1) | NO | Indicates whether the session is performing parallel SQL execution during the sampling. When 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 performing value retrieval for an auto-increment column or sequence during the sampling. |
| IN_COMMITTING | VARCHAR2(1) | NO | Indicates whether the sampling point is in the transaction commit stage. |
| IN_STORAGE_READ | VARCHAR2(1) | NO | Indicates whether the sampling point is in the storage read stage. |
| IN_STORAGE_WRITE | VARCHAR2(1) | NO | Indicates whether the sampling point is in the storage write stage. |
| IN_REMOTE_DAS_EXECUTION | VARCHAR2(1) | NO | Indicates whether the sampling point is in the DAS remote execution stage. |
| IN_FILTER_ROWS | VARCHAR2(1) | NO | Indicates whether the sampling point is in the storage push-down execution stage. |
| IN_RPC_ENCODE | VARCHAR2(1) | NO | Indicates the serialization operation being performed by the current SQL.
NoteFor V4.2.x versions, this field was introduced starting with V4.2.5. |
| IN_RPC_DECODE | VARCHAR2(1) | NO | Indicates the deserialization operation being performed by the current SQL.
NoteFor V4.2.x versions, this field was introduced starting with V4.2.5. |
| IN_CONNECTION_MGR | VARCHAR2(1) | NO | Indicates the connection establishment operation being performed by the current SQL.
NoteFor V4.2.x versions, this field was introduced starting with V4.2.5. |
| PROGRAM | VARCHAR2(64) | NO | The name of the program being executed at the sampling point:
|
| MODULE | VARCHAR2(64) | NO | The MODULE value recorded during the sampling, set by the DBMS_APPLICATION_INFO.SET_MODULE package. |
| ACTION | VARCHAR2(64) | NO | The ACTION value recorded during the sampling, set by the DBMS_APPLICATION_INFO.SET_ACTION package.
NoteThis field can be set starting with V4.2.3. |
| CLIENT_ID | VARCHAR2(64) | NO | The CLIENT_ID value recorded during the sampling, set by the DBMS_APPLICATION_INFO.set_identifier package.
NoteThis field can be set starting with V4.2.3. |
| BACKTRACE | VARCHAR2(512) | NO | 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 | NO | The time interval for calculating the time model, in microseconds. |
| TM_DELTA_CPU_TIME | NUMBER | NO | The amount of time spent on the CPU during the TM_DELTA_TIME period. |
| TM_DELTA_DB_TIME | NUMBER | NO | The amount of time spent on database calls during the TM_DELTA_TIME period. |
| TOP_LEVEL_SQL_ID | CHAR(32) | NO | The ID of the top-level SQL statement. |
| IN_PLSQL_COMPILATION | VARCHAR2(1) | NO | The PL compilation status: Y/N. |
| IN_PLSQL_EXECUTION | VARCHAR2(1) | NO | The PL execution status: Y/N. |
| PLSQL_ENTRY_OBJECT_ID | NUMBER | NO | The OBJECT ID of the top-level PL statement. |
| PLSQL_ENTRY_SUBPROGRAM_ID | NUMBER | NO | The subprogram ID of the top-level PL statement. |
| PLSQL_ENTRY_SUBPROGRAM_NAME | VARCHAR2(32) | NO | The subprogram name of the top-level PL statement. |
| PLSQL_OBJECT_ID | NUMBER | NO | The ID of the PL object being executed. |
| PLSQL_SUBPROGRAM_ID | NUMBER | NO | The ID of the PL subprogram being executed. |
| PLSQL_SUBPROGRAM_NAME | VARCHAR2(32) | NO | The name of the PL subprogram being executed. |
| BLOCKING_SESSION_ID | NUMBER | NO | If the current session is blocked, displays the session ID of the session that is blocking it. This field is effective only in lock conflict scenarios, displaying the session 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 read operations 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 cumulative 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 write operations 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 cumulative 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 the current OBServer node.
obclient [SYS]> SELECT * FROM SYS.V$OB_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: 1928654
SAMPLE_TIME: 04-MAR-25 11.11.36.569358 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: 1017435
TM_DELTA_CPU_TIME: 1017435
TM_DELTA_DB_TIME: 1017435
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 (0.028 sec)