Note
- This view was renamed to GV$OB_ACTIVE_SESSION_HISTORY starting from V4.2.2.
- This view is available starting with V4.0.0.
Purpose
The GV$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 | datetime | NO | The time when the sample was collected. |
| 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. For V4.2.x:
|
| SESSION_TYPE | varchar(10) | NO | The session type. |
| SESSION_STATE | varchar(7) | NO | The session state. EVENT field. |
| SQL_ID | varchar(32) | NO | The SQL ID. |
| PLAN_ID | bigint(20) | NO | The plan ID of the SQL statement in the PLAN CACHE. This field is used to associate the sampling point with the plan. |
| EVENT | varchar(64) | NO | The description of the waiting event. |
| EVENT_NO | bigint(20) | NO | The internal number of the waiting event. This field is used to join with other tables. |
| EVENT_ID | bigint(20) | YES | The ID of the current waiting event.
NoteThis field is available starting with V4.2.2. |
| P1TEXT | varchar(64) | NO | The name of the first parameter of the waiting event. This name changes depending on 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. This name changes depending on 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. This name changes depending on 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 field is used to join 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 operator ID of the SQL statement in the SQL plan at the time of sampling. |
| GROUP_ID | bigint(20) | NO | The group information of the sampling point
NoteThis field is available starting with V4.2.3. |
| PLAN_HASH | bigint(20) unsigned | NO | The plan hash value of the current SQL statement
NoteThis field is available starting with V4.2.4. |
| THREAD_ID | bigint(20) | NO | The thread ID of the current active session
NoteThis field is available starting with V4.2.4. |
| STMT_TYPE | bigint(20) | NO | The SQL type of the current active session
NoteThis field 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 field 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 SQL at the time of sampling. |
| IN_PX_EXECUTION | varchar(1) | NO | Indicates whether the session is performing parallel execution of SQL 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 | varchar(1) | NO | Indicates whether the session is fetching values for 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 field 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 field is available starting with V4.2.1. |
| IN_STORAGE_WRITE | varchar(1) | NO | Indicates whether the current sampling point is in the storage write stage.
NoteThis column is available starting with V4.2.1. |
| IN_REMOTE_DAS_EXECUTION | varchar(1) | NO | Indicates whether the current sampling point is in the DAS remote execution stage.
NoteThis column is available starting with V4.2.1. |
| IN_FILTER_ROWS | varchar(1) | NO | Indicates whether the current sampling point is in the storage pushdown execution stage.
NoteThis column is available starting with V4.2.2. |
| IN_RPC_ENCODE | varchar(1) | NO | Indicates whether the current SQL is being serialized.
NoteThis column is available starting with V4.2.5 in V4.2.x. |
| IN_RPC_DECODE | varchar(1) | NO | Indicates whether the current SQL is being deserialized.
NoteThis column is available starting with V4.2.5 in V4.2.x. |
| IN_CONNECTION_MGR | varchar(1) | NO | Indicates whether the current SQL is being connected.
NoteThis column is available starting with V4.2.5 in V4.2.x. |
| PROGRAM | varchar(64) | YES | The name of the program being executed at the current sampling point:
NoteThis column is available starting with V4.2.2. |
| MODULE | varchar(64) | YES | The MODULE value recorded at the time of sampling, set by using the DBMS_APPLICATION_INFO.SET_MODULE package.
NoteThis column can be set starting with V4.2.3. |
| ACTION | varchar(64) | YES | The ACTION value recorded at the time of sampling, set by using the DBMS_APPLICATION_INFO.SET_ACTION package.
NoteThis column can be set starting with V4.2.3. |
| CLIENT_ID | varchar(64) | YES | The CLIENT_ID value recorded at the time of sampling, set by using the DBMS_APPLICATION_INFO.set_identifier package.
NoteThis column can be set starting with V4.2.3. |
| BACKTRACE | varchar(512) | YES | A debugging field used to record the 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.
NoteThis column is available starting with V4.2.2. |
| TM_DELTA_CPU_TIME | bigint(20) | YES | The amount of time spent on the CPU in the TM_DELTA_TIME time period.
NoteThis column is available starting with V4.2.2. |
| TM_DELTA_DB_TIME | bigint(20) | YES | The amount of time spent in database calls in the TM_DELTA_TIME time period.
NoteThis column is available starting with V4.2.2. |
| TOP_LEVEL_SQL_ID | varchar(32) | YES | The ID of the top-level SQL statement.
NoteThis column is available starting with V4.2.2. |
| IN_PLSQL_COMPILATION | varchar(1) | NO | The PL compilation status: Y/N.
NoteThis column is available starting with V4.2.2. |
| IN_PLSQL_EXECUTION | varchar(1) | NO | The PL execution status: Y/N.
NoteThis column is available starting with V4.2.2. |
| PLSQL_ENTRY_OBJECT_ID | bigint(20) | YES | The object ID of the top-level PL statement.
NoteThis column is available starting with V4.2.2. |
| PLSQL_ENTRY_SUBPROGRAM_ID | bigint(20) | YES | The subproject ID of the top-level PL statement.
NoteThis column is available starting with V4.2.2. |
| PLSQL_ENTRY_SUBPROGRAM_NAME | varchar(32) | YES | The subproject name of the top-level PL statement.
NoteThis column is available starting with V4.2.2. |
| PLSQL_OBJECT_ID | bigint(20) | YES | The object ID of the currently executing PL statement.
NoteThis column is available starting with V4.2.2. |
| PLSQL_SUBPROGRAM_ID | bigint(20) | YES | The ID of the PL subprogram currently being executed.
NoteThis column is available starting with V4.2.2. |
| PLSQL_SUBPROGRAM_NAME | varchar(32) | YES | The name of the PL subprogram currently being executed.
NoteThis column is available starting with V4.2.2. |
| BLOCKING_SESSION_ID | bigint(20) | NO | If the current session is blocked, the ID of the session that blocks the current session. This column is effective only in lock conflict scenarios and 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 sampling intervals.
NoteFor V4.2.x versions, 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 sampling intervals.
NoteFor V4.2.x versions, 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 versions, 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 sampling intervals.
NoteFor V4.2.x versions, this column is available starting with V4.2.5 BP3. |
Sample query
Query the active session history of all OBServer nodes in the current tenant.
obclient [oceanbase]> SELECT * FROM oceanbase.GV$ACTIVE_SESSION_HISTORY limit 1\G
The query result is as follows:
*************************** 1. row ***************************
SVR_IP: xx.xx.xx.xx
SVR_PORT: 2882
SAMPLE_ID: 1914222
SAMPLE_TIME: 2025-03-04 10:28:49.501291
CON_ID: 1002
USER_ID: 0
SESSION_ID: -9223372036854729604
SESSION_TYPE: BACKGROUND
SESSION_STATE: ON CPU
SQL_ID: NULL
PLAN_ID: 0
TRACE_ID: NULL
EVENT:
EVENT_NO: 0
EVENT_ID: NULL
P1TEXT:
P1: 0
P2TEXT:
P2: 0
P3TEXT:
P3: 0
WAIT_CLASS: OTHER
WAIT_CLASS_ID: 100
TIME_WAITED: 0
SQL_PLAN_LINE_ID: NULL
GROUP_ID: 0
PLAN_HASH: NULL
THREAD_ID: 82045
STMT_TYPE: NULL
TIME_MODEL: 0
IN_PARSE: N
IN_PL_PARSE: N
IN_PLAN_CACHE: N
IN_SQL_OPTIMIZE: N
IN_SQL_EXECUTION: N
IN_PX_EXECUTION: N
IN_SEQUENCE_LOAD: N
IN_COMMITTING: N
IN_STORAGE_READ: N
IN_STORAGE_WRITE: N
IN_REMOTE_DAS_EXECUTION: N
IN_FILTER_ROWS: N
IN_RPC_ENCODE: N
IN_RPC_DECODE: N
IN_CONNECTION_MGR: N
PROGRAM: T1002_LogService
MODULE: LogRestoreService
ACTION: RemoteLogWriter
CLIENT_ID: NULL
BACKTRACE: NULL
TM_DELTA_TIME: 1018079
TM_DELTA_CPU_TIME: 1018079
TM_DELTA_DB_TIME: 1018079
TOP_LEVEL_SQL_ID: NULL
IN_PLSQL_COMPILATION: N
IN_PLSQL_EXECUTION: N
PLSQL_ENTRY_OBJECT_ID: NULL
PLSQL_ENTRY_SUBPROGRAM_ID: NULL
PLSQL_ENTRY_SUBPROGRAM_NAME: NULL
PLSQL_OBJECT_ID: NULL
PLSQL_SUBPROGRAM_ID: NULL
PLSQL_SUBPROGRAM_NAME: NULL
BLOCKING_SESSION_ID: NULL
TABLET_ID: NULL
PROXY_SID: -9223372036854729604
TX_ID: NULL
DELTA_READ_IO_REQUESTS: 0
DELTA_READ_IO_BYTES: 0
DELTA_WRITE_IO_REQUESTS: 0
DELTA_WRITE_IO_BYTES: 0
1 row in set (0.052 sec)
References
- Query the active session history of all OBServer nodes in the current tenant: GV$OB_ACTIVE_SESSION_HISTORY
- Query the active session history of the current OBServer node in the current tenant: V$OB_ACTIVE_SESSION_HISTORY