Note
- This view was renamed to V$OB_ACTIVE_SESSION_HISTORY starting with 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 time when the sample was taken. |
| CON_ID | bigint(20) | NO | The tenant ID. |
| USER_ID | bigint(20) | NO | The user ID of the session that was sampled. |
| SESSION_ID | bigint(20) | NO | The ID of the session that was 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 plan of the sampled SQL statement in the plan cache. This ID is used to associate the sampled point with the 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 query 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 with 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 with 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 with 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 query 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 at the time when the sample was taken. |
| GROUP_ID | bigint(20) | NO | The group information of the sampled 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. It 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 was parsing an SQL statement at the time when the sample was taken. |
| IN_PL_PARSE | varchar(1) | NO | Indicates whether the session was parsing an SQL PL statement at the time when the sample was taken. |
| IN_PLAN_CACHE | varchar(1) | NO | Indicates whether the session was matching a plan in the plan cache at the time when the sample was taken. |
| IN_SQL_OPTIMIZE | varchar(1) | NO | Indicates whether the session was optimizing the SQL statement at the time when the sample was taken. |
| IN_SQL_EXECUTION | varchar(1) | NO | Indicates whether the session was executing an SQL statement at the time when the sample was taken. |
| IN_PX_EXECUTION | varchar(1) | NO | Indicates whether the session was executing an SQL statement in parallel at the time when the sample was taken. If the session is in this state, it must also be in the IN_SQL_EXECUTION state. |
| IN_SEQUENCE_LOAD | varchar(1) | NO | Indicates whether the session was retrieving values from an auto-increment column or a sequence at the time when the sample was taken. |
| IN_COMMITTING | varchar(1) | NO | Indicates whether the current sampled 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 current sampled 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 current sampled 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 current sampled 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 current sampled 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 program name of the current sampling point.
NoteThis column is available starting with V4.2.2. |
| MODULE | varchar(64) | NO | This column indicates the MODULE value recorded during 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 during 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 during 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 is used for debugging and 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 during the TM_DELTA_TIME time period.
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 during the TM_DELTA_TIME time period.
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 status of the current PL compilation: Y/N.
NoteThis column is available starting with V4.2.2. |
| IN_PLSQL_EXECUTION | varchar(1) | NO | This column indicates the status of the current PL execution: 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 subproject 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 subproject 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 ID of the current PL object.
NoteThis column is available starting with V4.2.2. |
| PLSQL_SUBPROGRAM_ID | bigint(20) | NO | This column indicates the ID of the current PL subprogram.
NoteThis column is available starting with V4.2.2. |
| PLSQL_SUBPROGRAM_NAME | varchar(32) | NO | This column indicates the name of the current PL subprogram.
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 valid 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 query
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 sampling intervals
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 files read between two sampling intervals
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 sampling intervals
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 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 [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: 1919434
SAMPLE_TIME: 2025-03-04 10:44:17.593988
CON_ID: 1001
USER_ID: 0
SESSION_ID: -9223372036854729409
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: 82216
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: T1001_LogService
MODULE: LogRestoreService
ACTION: RemoteLogWriter
CLIENT_ID: NULL
BACKTRACE: NULL
TM_DELTA_TIME: 1017436
TM_DELTA_CPU_TIME: 1017436
TM_DELTA_DB_TIME: 1017436
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: -9223372036854729409
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 (0.026 sec)