Note
- This view was renamed to V$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 | varchar(46) | NO | The IP address of the server to which the sample belongs. |
| SVR_PORT | bigint(20) | NO | The port number of the server to which the sample belongs. |
| SAMPLE_ID | bigint(20) | NO | The unique ID of the sample. |
| SAMPLE_TIME | datetime | NO | The sampling time. |
| CON_ID | bigint(20) | NO | The tenant ID. |
| USER_ID | bigint(20) | NO | The ID of the user of the session being sampled. |
| SESSION_ID | bigint(20) | NO | The ID of the session being sampled. |
| SESSION_TYPE | varchar(10) | NO | The session type. Valid values: |
| SESSION_STATE | varchar(7) | NO | The session state. Valid values: EVENT column. |
| SQL_ID | varchar(32) | NO | The SQL ID. |
| PLAN_ID | bigint(20) | NO | The ID of the execution plan of the sampled SQL statement in the plan cache. This ID is used to associate the sampling point with the execution plan. |
| EVENT | varchar(64) | NO | The description of the waiting event. |
| EVENT_NO | bigint(20) | NO | The internal ID of the waiting event. This ID is used to associate the sampling point with other tables. |
| EVENT_ID | bigint(20) | NO | The ID of the waiting event.
NoteThis column is available starting with V4.2.2. |
| P1TEXT | varchar(64) | NO | The name of the first parameter of the waiting event. The name varies depending on the value of the EVENT column. |
| P1 | bigint(20) | NO | The value of the first parameter of the waiting event. |
| P2TEXT | varchar(64) | NO | The name of the second parameter of the waiting event. The name varies depending on the value of the EVENT column. |
| P2 | bigint(20) | NO | The value of the second parameter of the waiting event. |
| P3TEXT | varchar(64) | NO | The name of the third parameter of the waiting event. The name varies depending on the value of the EVENT column. |
| P3 | bigint(20) | NO | The value of the third parameter of the waiting event. |
| WAIT_CLASS | varchar(64) | NO | The type of the waiting event. |
| WAIT_CLASS_ID | bigint(20) | NO | The ID of the type of the waiting event. This ID is used to associate the sampling point with other tables. |
| TIME_WAITED | bigint(20) | NO | The total waiting time of the waiting event, in microseconds (us). |
| SQL_PLAN_LINE_ID | bigint(20) | NO | The ID of the SQL operator in the SQL plan of the session at the time of sampling. |
| GROUP_ID | bigint(20) | NO | The group information of the sampling point
NoteThis column is available starting with V4.2.3. |
| PLAN_HASH | bigint(20) unsigned | NO | The plan_hash of the current SQL statement
NoteThis column is available starting with V4.2.4. |
| THREAD_ID | bigint(20) | NO | The ID of the thread to which the current active session belongs
NoteThis column is available starting with V4.2.4. |
| STMT_TYPE | bigint(20) | NO | The SQL type of the current active session
NoteThis column is available starting with V4.2.4. |
| TIME_MODEL | bigint(20) | NO | The time model information, which is a collection of data from all IN_XXX columns, such as IN_PARSE and IN_PL_PARSE
NoteThis column is available starting with V4.2.4. |
| IN_PARSE | varchar(1) | NO | Indicates whether the session is performing SQL parsing at the time of sampling. |
| IN_PL_PARSE | varchar(1) | NO | Indicates whether the session is performing SQL PL parsing at the time of sampling. |
| IN_PLAN_CACHE | varchar(1) | NO | Indicates whether the session is matching a plan in the plan cache at the time of sampling. |
| IN_SQL_OPTIMIZE | varchar(1) | NO | Indicates whether the session is performing SQL parsing optimization at the time of sampling. |
| IN_SQL_EXECUTION | varchar(1) | NO | Indicates whether the session is executing an SQL statement at the time of sampling. |
| IN_PX_EXECUTION | varchar(1) | NO | Indicates whether the session is performing parallel execution of an SQL statement at the time of sampling. If the session is in this state, it is also in the IN_SQL_EXECUTION state. |
| IN_SEQUENCE_LOAD | varchar(1) | NO | Indicates whether the session is fetching values from an auto-increment column or a sequence at the time of sampling. |
| IN_COMMITTING | varchar(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 | varchar(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 | varchar(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 | varchar(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 | varchar(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 | varchar(1) | NO | This column indicates 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 | varchar(1) | NO | This column indicates 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 | varchar(1) | NO | This column indicates the connection operation being performed by the current SQL statement.
NoteThis column is available starting with V4.2.5 in V4.2.x. |
| PROGRAM | varchar(64) | NO | This column indicates the name of the program being executed at the current sampling point:
NoteThis column is available starting with V4.2.2. |
| MODULE | varchar(64) | NO | This column indicates the MODULE value recorded at the time of sampling. The value is set by using the DBMS_APPLICATION_INFO.SET_MODULE package.
NoteThis column is available starting with V4.2.3. |
| ACTION | varchar(64) | NO | This column indicates the ACTION value recorded at the time of sampling. The value is set by using the DBMS_APPLICATION_INFO.SET_ACTION package.
NoteThis column is available starting with V4.2.3. |
| CLIENT_ID | varchar(64) | NO | This column indicates the CLIENT_ID value recorded at the time of sampling. The value is set by using the DBMS_APPLICATION_INFO.set_identifier package.
NoteThis column is available starting with V4.2.3. |
| BACKTRACE | varchar(512) | NO | This column records the code call stack at the time of the event. The value of this column is always NULL. |
| TM_DELTA_TIME | bigint(20) | NO | This column indicates the time interval for calculating the time model, in microseconds.
NoteThis column is available starting with V4.2.2. |
| TM_DELTA_CPU_TIME | bigint(20) | NO | This column indicates the amount of time spent on the CPU in the last TM_DELTA_TIME time interval.
NoteThis column is available starting with V4.2.2. |
| TM_DELTA_DB_TIME | bigint(20) | NO | This column indicates the amount of time spent on database calls in the last TM_DELTA_TIME time interval.
NoteThis column is available starting with V4.2.2. |
| TOP_LEVEL_SQL_ID | varchar(32) | NO | This column indicates the ID of the top-level SQL statement.
NoteThis column is available starting with V4.2.2. |
| IN_PLSQL_COMPILATION | varchar(1) | NO | This column indicates the PL compilation status: Y/N.
NoteThis column is available starting with V4.2.2. |
| IN_PLSQL_EXECUTION | varchar(1) | NO | This column indicates the PL execution status: Y/N.
NoteThis column is available starting with V4.2.2. |
| PLSQL_ENTRY_OBJECT_ID | bigint(20) | NO | This column indicates the object ID of the top-level PL statement.
NoteThis column is available starting with V4.2.2. |
| PLSQL_ENTRY_SUBPROGRAM_ID | bigint(20) | NO | This column indicates the subprogram ID of the top-level PL statement.
NoteThis column is available starting with V4.2.2. |
| PLSQL_ENTRY_SUBPROGRAM_NAME | varchar(32) | NO | This column indicates the subprogram name of the top-level PL statement.
NoteThis column is available starting with V4.2.2. |
| PLSQL_OBJECT_ID | bigint(20) | NO | This column indicates the object ID of the current PL statement.
NoteThis column is available starting with V4.2.2. |
| PLSQL_SUBPROGRAM_ID | bigint(20) | NO | This column indicates the subprogram ID of the current PL statement.
NoteThis column is available starting with V4.2.2. |
| PLSQL_SUBPROGRAM_NAME | varchar(32) | NO | This column indicates the subprogram name of the current PL statement.
NoteThis column is available starting with V4.2.2. |
| BLOCKING_SESSION_ID | bigint(20) | NO | This column indicates the ID of the session that is blocking the current session. This column is effective only in lock conflict scenarios, and it displays the ID of the session that holds the lock.
Note
|
| TABLET_ID | bigint(20) | NO | The ID of the tablet that is being processed by the current SQL statement.
Note
|
| PROXY_SID | bigint(20) | NO | The ID of the proxy session.
Note
|
| TX_ID | bigint(20) | NO | The ID of the current transaction.
Note
|
| DELTA_READ_IO_REQUESTS | bigint(20) | NO | The number of read requests between two samples.
NoteFor V4.2.x, this column is available starting with V4.2.5 BP3. |
| DELTA_READ_IO_BYTES | bigint(20) | NO | The total size of the files read between two samples.
NoteFor V4.2.x, this column is available starting with V4.2.5 BP3. |
| DELTA_WRITE_IO_REQUESTS | bigint(20) | NO | The number of write requests between two samples.
NoteFor V4.2.x, this column is available starting with V4.2.5 BP3. |
| DELTA_WRITE_IO_BYTES | bigint(20) | NO | The total size of the files written between two samples.
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 [oceanbase]> SELECT * FROM oceanbase.V$ACTIVE_SESSION_HISTORY limit 1 \G
The query result is as follows:
*************************** 1. row ***************************
SVR_IP: xx.xx.xx.xx
SVR_PORT: 2882
SAMPLE_ID: 1919921
SAMPLE_TIME: 2025-03-04 10:45:34.101314
CON_ID: 1002
USER_ID: 0
SESSION_ID: -9223372036854729604
SESSION_TYPE: BACKGROUND
SESSION_STATE: ON CPU
SQL_ID: NULL
PLAN_ID: 0
TRACE_ID: NULL
EVENT:
EVENT_NO: 0
EVENT_ID: NULL
P1TEXT:
P1: 0
P2TEXT:
P2: 0
P3TEXT:
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: 82045
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: T1002_LogService
MODULE: LogRestoreService
ACTION: RemoteLogWriter
CLIENT_ID: NULL
BACKTRACE: NULL
TM_DELTA_TIME: 1017670
TM_DELTA_CPU_TIME: 1017670
TM_DELTA_DB_TIME: 1017670
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: -9223372036854729604
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 (0.021 sec)