Note
This view is available starting with V4.2.2.
Purpose
The GV$OB_ACTIVE_SESSION_HISTORY view displays the active session history of all OBServer nodes in the current tenant.
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 | timestamp(6) | NO | The time when the sample was taken. |
| CON_ID | bigint(20) | NO | The tenant ID. |
| USER_ID | bigint(20) | NO | The ID of the user of the session that was sampled. |
| SESSION_ID | bigint(20) | NO | The ID of the session that was sampled. For V4.2.x:
|
| SESSION_TYPE | varchar(10) | NO | The session type.
|
| SESSION_STATE | varchar(7) | NO | The session state.
|
| SQL_ID | varchar(32) | NO | The SQL ID. |
| PLAN_ID | bigint(20) | NO | The ID of the plan of the sampled SQL in the plan cache. This ID is used to associate the sampling point with the plan. |
| TRACE_ID | varchar(64) | NO | The trace ID of the operator. |
| 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) | YES | The ID of the waiting event. |
| P1TEXT | varchar(64) | NO | The name of the first parameter of the waiting event. The name varies with the value of the EVENT field. |
| 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 field. |
| 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 field. |
| 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) | YES | The ID of the SQL operator in the SQL plan at the time the sample was taken. |
| GROUP_ID | bigint(20) | YES | The group information of the sampling point.
NoteThis column is available starting with V4.2.3. |
| PLAN_HASH | bigint(20) unsigned | YES | The plan_hash of the SQL command that is currently being executed.
NoteThis column is available starting with V4.2.4. |
| THREAD_ID | bigint(20) | YES | The ID of the thread to which the active session belongs.
NoteThis column is available starting with V4.2.4. |
| STMT_TYPE | bigint(20) | YES | The SQL type of the 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 fields, 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 performing SQL parsing at the time the sample was taken. |
| IN_PL_PARSE | varchar(1) | NO | Indicates whether the session was performing SQL PL parsing at the time the sample was taken. |
| IN_PLAN_CACHE | varchar(1) | NO | Indicates whether the session was performing plan cache matching at the time the sample was taken. |
| IN_SQL_OPTIMIZE | varchar(1) | NO | Indicates whether the session was performing SQL parsing optimization at the time the sample was taken. |
| IN_SQL_EXECUTION | varchar(1) | NO | Indicates whether the session was performing SQL execution at the time the sample was taken. |
| IN_PX_EXECUTION | varchar(1) | NO | Indicates whether the session was performing parallel SQL execution 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 | varchar(1) | NO | Indicates whether the session was retrieving values from an auto-increment column or a sequence at the time the sample was taken. |
| IN_COMMITTING | varchar(1) | NO | Indicates whether the sampling point is in the transaction commit stage. |
| IN_STORAGE_READ | varchar(1) | NO | Indicates whether the sampling point is in the storage read stage. |
| IN_STORAGE_WRITE | varchar(1) | NO | Indicates whether the sampling point is in the storage write stage. |
| IN_REMOTE_DAS_EXECUTION | varchar(1) | NO | Indicates whether the sampling point is in the DAS remote execution stage. |
| IN_FILTER_ROWS | varchar(1) | NO | Indicates whether the sampling point is in the storage push-down execution stage. |
| IN_RPC_ENCODE | varchar(1) | NO | The serialization operation being performed by the current SQL statement.
NoteThis column is available starting with V4.2.5 for V4.2.x. |
| IN_RPC_DECODE | varchar(1) | NO | The deserialization operation being performed by the current SQL statement.
NoteThis column is available starting with V4.2.5 for V4.2.x. |
| IN_CONNECTION_MGR | varchar(1) | NO | The connection operation being performed by the current SQL statement.
NoteThis column is available starting with V4.2.5 for V4.2.x. |
| PROGRAM | varchar(64) | YES | The name of the program being executed at the sampling point:
|
| MODULE | varchar(64) | YES | The MODULE value recorded at the sampling time, set by using the DBMS_APPLICATION_INFO.SET_MODULE package. |
| ACTION | varchar(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 | varchar(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 | varchar(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 | bigint(20) | YES | The time interval for calculating the time model, in microseconds. |
| TM_DELTA_CPU_TIME | bigint(20) | YES | The amount of time spent on the CPU during the TM_DELTA_TIME time period. |
| TM_DELTA_DB_TIME | bigint(20) | YES | The amount of time spent on database calls during the TM_DELTA_TIME time period. |
| TOP_LEVEL_SQL_ID | varchar(32) | YES | The ID of the top-level SQL statement. |
| IN_PLSQL_COMPILATION | varchar(1) | NO | The PL compilation status: Y/N |
| IN_PLSQL_EXECUTION | varchar(1) | NO | The PL execution status: Y/N |
| PLSQL_ENTRY_OBJECT_ID | bigint(20) | YES | The OBJECT ID of the top-level PL statement. |
| PLSQL_ENTRY_SUBPROGRAM_ID | bigint(20) | YES | The Sub project ID of the top-level PL statement. |
| PLSQL_ENTRY_SUBPROGRAM_NAME | varchar(32) | YES | The Sub project name of the top-level PL statement. |
| PLSQL_OBJECT_ID | bigint(20) | YES | The ID of the PL object being executed. |
| PLSQL_SUBPROGRAM_ID | bigint(20) | YES | The ID of the PL subprogram being executed. |
| PLSQL_SUBPROGRAM_NAME | varchar(32) | YES | The name of the PL subprogram being executed. |
| BLOCKING_SESSION_ID | bigint(20) | YES | If the current session is blocked, the session ID that blocks the current session. This field is effective only in lock conflict scenarios, displaying the session ID that holds the lock.
Note
|
| TABLET_ID | bigint(20) | YES | The ID of the tablet being processed by the current SQL statement.
Note
|
| PROXY_SID | bigint(20) | YES | The ID of the proxy session.
Note
|
| TX_ID | bigint(20) | YES | The ID of the current transaction.
Note
|
| DELTA_READ_IO_REQUESTS | bigint(20) | NO | The number of reads between two sampling points.
NoteThis column is available starting with V4.2.5 BP3 for V4.2.x. |
| DELTA_READ_IO_BYTES | bigint(20) | NO | The total size of files read between two sampling points.
NoteThis column is available starting with V4.2.5 BP3 for V4.2.x. |
| DELTA_WRITE_IO_REQUESTS | bigint(20) | NO | The number of write requests between two samples.
NoteThis column is available starting with V4.2.5 BP3 for V4.2.x. |
| DELTA_WRITE_IO_BYTES | bigint(20) | NO | The total size of files written between two samples.
NoteThis column is available starting with V4.2.5 BP3 for V4.2.x. |
Sample query
Query the active session history of all OBServer nodes in the current tenant.
obclient [oceanbase]> SELECT * FROM oceanbase.GV$OB_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: 1925478
SAMPLE_TIME: 2025-03-04 11:01:49.113598
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: 1017448
TM_DELTA_CPU_TIME: 1017448
TM_DELTA_DB_TIME: 1017448
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 (0.014 sec)
References
- Query the active session history of the current OBServer node in the current tenant: V$OB_ACTIVE_SESSION_HISTORY
- For more information about the active session history, see ASH report