Note
This view is available starting with V4.2.2.
Purpose
The V$OB_ACTIVE_SESSION_HISTORY view displays the active session history of the current OBServer node for all tenants.
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 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 plan ID 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 number of the waiting event, which is used for cross-table queries. |
| EVENT_ID | bigint(20) | NO | The ID of the current waiting event. |
| P1TEXT | varchar(64) | NO | The name of the first parameter of the waiting event. The name varies 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. The name varies 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. The name varies 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, which is used for cross-table queries. |
| TIME_WAITED | bigint(20) | NO | The total waiting time of the waiting event, in microseconds (us). |
| SQL_PLAN_LINE_ID | bigint(20) | NO | The number of the SQL operator in the SQL plan at the time when the sample was collected. |
| 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 currently executed SQL command.
NoteThis column is available starting with V4.2.4. |
| THREAD_ID | bigint(20) | NO | The thread ID of the currently active session.
NoteThis column is available starting with V4.2.4. |
| STMT_TYPE | bigint(20) | NO | The SQL type of the currently 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 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 is performing SQL parsing during sampling. |
| IN_PL_PARSE | varchar(1) | NO | Indicates whether the session is performing SQL PL parsing during sampling. |
| IN_PLAN_CACHE | varchar(1) | NO | Indicates whether the session is performing plan cache matching during sampling. |
| IN_SQL_OPTIMIZE | varchar(1) | NO | Indicates whether the session is performing SQL parsing optimization during sampling. |
| IN_SQL_EXECUTION | varchar(1) | NO | Indicates whether the session is performing SQL execution during sampling. |
| IN_PX_EXECUTION | varchar(1) | NO | Indicates whether the session is performing parallel SQL execution during sampling. When 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 retrieving values for an auto-increment column or SEQUENCE during sampling. |
| IN_COMMITTING | varchar(1) | NO | Indicates whether the current sampling point is in the transaction commit phase. |
| IN_STORAGE_READ | varchar(1) | NO | Indicates whether the current sampling point is in the storage read phase. |
| IN_STORAGE_WRITE | varchar(1) | NO | Indicates whether the current sampling point is in the storage write phase. |
| IN_REMOTE_DAS_EXECUTION | varchar(1) | NO | Indicates whether the current sampling point is in the DAS remote execution phase. |
| IN_FILTER_ROWS | varchar(1) | NO | Indicates whether the current sampling point is in the storage pushdown execution phase. |
| IN_RPC_ENCODE | varchar(1) | NO | Indicates the current serialization operation being performed by the SQL.
NoteFor V4.2.x versions, this field was introduced starting from V4.2.5. |
| IN_RPC_DECODE | varchar(1) | NO | Indicates the current deserialization operation being performed by the SQL.
NoteFor V4.2.x versions, this field was introduced starting from V4.2.5. |
| IN_CONNECTION_MGR | varchar(1) | NO | Indicates the current link creation operation being performed by the SQL.
NoteFor V4.2.x versions, this field was introduced starting from V4.2.5. |
| PROGRAM | varchar(64) | NO | The name of the program being executed at the current sampling point:
|
| MODULE | varchar(64) | NO | The MODULE value recorded during sampling, set by the DBMS_APPLICATION_INFO.SET_MODULE package. |
| ACTION | varchar(64) | NO | The ACTION value recorded during sampling, set by the DBMS_APPLICATION_INFO.SET_ACTION package.
NoteThis field was introduced starting from V4.2.3. |
| CLIENT_ID | varchar(64) | NO | The CLIENT_ID value recorded during sampling, set by the DBMS_APPLICATION_INFO.set_identifier package.
NoteThis field was introduced starting from V4.2.3. |
| BACKTRACE | varchar(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 | bigint(20) | NO | The time interval for calculating the time model, in microseconds. |
| TM_DELTA_CPU_TIME | bigint(20) | NO | The amount of time spent on the CPU during the TM_DELTA_TIME period. |
| TM_DELTA_DB_TIME | bigint(20) | NO | The amount of time spent on database calls during the TM_DELTA_TIME period. |
| TOP_LEVEL_SQL_ID | varchar(32) | NO | The ID of the top-level SQL. |
| 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) | NO | The OBJECT ID of the top-level PL. |
| PLSQL_ENTRY_SUBPROGRAM_ID | bigint(20) | NO | The subprogram ID of the top-level PL. |
| PLSQL_ENTRY_SUBPROGRAM_NAME | varchar(32) | NO | The subprogram name of the top-level PL. |
| PLSQL_OBJECT_ID | bigint(20) | NO | The ID of the PL object currently being executed. |
| PLSQL_SUBPROGRAM_ID | bigint(20) | NO | The ID of the PL subprogram currently being executed. |
| PLSQL_SUBPROGRAM_NAME | varchar(32) | NO | The name of the PL subprogram currently being executed. |
| BLOCKING_SESSION_ID | bigint(20) | NO | If the current session is blocked, displays the session ID of the session that is blocking the current session. This field is only effective in lock conflict scenarios, showing the session ID holding the lock.
Note
|
| TABLET_ID | bigint(20) | NO | The ID of the tablet 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 reads between two sampling intervals.
NoteFor V4.2.x versions, this field was introduced starting with V4.2.5 BP3. |
| DELTA_READ_IO_BYTES | bigint(20) | NO | The cumulative size of files read between two sampling intervals.
NoteFor V4.2.x versions, this field was introduced starting with V4.2.5 BP3. |
| DELTA_WRITE_IO_REQUESTS | bigint(20) | NO | The number of writes between two sampling intervals.
NoteFor V4.2.x versions, this field was introduced starting with V4.2.5 BP3. |
| DELTA_WRITE_IO_BYTES | bigint(20) | NO | The cumulative size of files written between two sampling intervals.
NoteFor V4.2.x versions, this field was introduced starting with V4.2.5 BP3. |
Sample query
Query the active session history of the current OBServer node across all tenants.
obclient [oceanbase]> SELECT * FROM oceanbase.V$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: 1923642
SAMPLE_TIME: 2025-03-04 10:56:11.514023
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: 1017261
TM_DELTA_CPU_TIME: 1017261
TM_DELTA_DB_TIME: 1017261
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 (0.018 sec)