Note
- This view is available starting with V4.3.5 for V4.3.x.
- This view is available starting with V4.2.2 for V4.2.x.
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 being sampled. |
| SESSION_ID | bigint(20) | NO | The ID of the session being sampled. For V4.3.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 ID of the waiting event. This ID is used for cross-table queries. |
| EVENT_ID | bigint(20) | YES | The ID of the current waiting event. |
| P1TEXT | varchar(64) | NO | The name of the first parameter of the waiting event. The name varies based 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 based 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 based 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 ID 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) | YES | The line number of the SQL operator in the SQL plan at the time the sample was taken. |
| GROUP_ID | bigint(20) | YES | The ID of the resource group to which the sample belongs. |
| PLAN_HASH | bigint(20) unsigned | YES | The plan hash of the current SQL statement. |
| THREAD_ID | bigint(20) | YES | The ID of the thread to which the current active session belongs. |
| STMT_TYPE | bigint(20) | YES | The SQL type of the current active session. |
| TIME_MODEL | bigint(20) | NO | The time model information, which is the collection of all IN_XXX fields (such as IN_PARSE and IN_PL_PARSE). |
| IN_PARSE | varchar(1) | NO | Indicates whether the session is performing SQL parsing at the time the sample was taken. |
| IN_PL_PARSE | varchar(1) | NO | Indicates whether the session is performing SQL PL parsing at the time the sample was taken. |
| IN_PLAN_CACHE | varchar(1) | NO | Indicates whether the session is matching a plan cache at the time the sample was taken. |
| IN_SQL_OPTIMIZE | varchar(1) | NO | Indicates whether the session is performing SQL parsing optimization at the time the sample was taken. |
| IN_SQL_EXECUTION | varchar(1) | NO | Indicates whether the session is performing SQL execution at the time the sample was taken. |
| IN_PX_EXECUTION | varchar(1) | NO | Indicates whether the session is 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 is retrieving an auto-increment column value or a sequence value at the time the sample was taken. |
| IN_COMMITTING | varchar(1) | NO | Indicates whether the sample was taken during the transaction commit phase. |
| IN_STORAGE_READ | varchar(1) | NO | Indicates whether the sample was taken during the storage read phase. |
| IN_STORAGE_WRITE | varchar(1) | NO | Indicates whether the sample was taken during the storage write phase. |
| IN_REMOTE_DAS_EXECUTION | varchar(1) | NO | Indicates whether the sample was taken during the DAS remote execution phase. |
| IN_FILTER_ROWS | varchar(1) | NO | Indicates whether the sample was taken during the storage push-down execution phase. |
| IN_RPC_ENCODE | varchar(1) | NO | The serialization operation being performed by the current SQL statement. |
| IN_RPC_DECODE | varchar(1) | NO | The deserialization operation being performed by the current SQL statement. |
| IN_CONNECTION_MGR | varchar(1) | NO | The connection establishment operation being performed by the current SQL statement. |
| PROGRAM | varchar(64) | YES | The name of the program running at the current sampling point:
|
| MODULE | varchar(64) | YES | The MODULE value recorded by the session at the time of sampling. This value is set by using the DBMS_APPLICATION_INFO.SET_MODULE package. |
| ACTION | varchar(64) | YES | The ACTION value recorded by the session at the time of sampling. This value is set by using the DBMS_APPLICATION_INFO.SET_ACTION package. |
| CLIENT_ID | varchar(64) | YES | The CLIENT_ID value recorded by the session at the time of sampling. This value is set by using the DBMS_SESSION.set_identifier package. |
| BACKTRACE | varchar(512) | YES | This field is used for debugging. It records 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. |
| TM_DELTA_CPU_TIME | bigint(20) | YES | The amount of time spent on the CPU during the TM_DELTA_TIME period. |
| TM_DELTA_DB_TIME | bigint(20) | YES | The amount of time spent on database calls during the TM_DELTA_TIME period. |
| TOP_LEVEL_SQL_ID | varchar(32) | YES | The SQL ID at the top level. |
| 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. |
| PLSQL_ENTRY_SUBPROGRAM_ID | bigint(20) | YES | The Sub project ID of the top-level PL. |
| PLSQL_ENTRY_SUBPROGRAM_NAME | varchar(32) | YES | The Sub project name of the top-level PL. |
| PLSQL_OBJECT_ID | bigint(20) | YES | The object ID of the PL currently being executed. |
| PLSQL_SUBPROGRAM_ID | bigint(20) | YES | The subprogram ID of the PL currently being executed. |
| PLSQL_SUBPROGRAM_NAME | varchar(32) | YES | The subprogram name of the PL currently being executed. |
| TX_ID | bigint(20) | YES | The ID of the current transaction. |
| BLOCKING_SESSION_ID | bigint(20) | YES | If the current session is blocked, this field displays the ID of the session that blocks the current session. Currently, this field is effective only in lock conflict scenarios, displaying the ID of the session that holds the lock. |
| TABLET_ID | bigint(20) | YES | The ID of the tablet being processed by the current SQL statement. |
| PROXY_SID | bigint(20) | YES | The ID of the proxy session. |
| DELTA_READ_IO_REQUESTS | bigint(20) | NO | The number of read operations between two sampling points.
Note
|
| DELTA_READ_IO_BYTES | bigint(20) | NO | The total size of files read between two sampling points.
Note
|
| DELTA_WRITE_IO_REQUESTS | bigint(20) | NO | The number of write operations between two sampling points.
Note
|
| DELTA_WRITE_IO_BYTES | bigint(20) | NO | The total size of files written between two sampling points.
Note
|
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: 628878
SAMPLE_TIME: 2025-05-29 16:18:39.173041
CON_ID: 1002
USER_ID: 200001
SESSION_ID: 2305843009213708800
SESSION_TYPE: BACKGROUND
SESSION_STATE: ON CPU
SQL_ID: NULL
PLAN_ID: 0
TRACE_ID: YB42AC1E87E0-XXXXXXXXXXXXXXXXXX-0-0
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: 83145
STMT_TYPE: NULL
TIME_MODEL: 65536
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: Y
PROGRAM: T1002_PLSSer
MODULE: PLSSer
ACTION: NULL
CLIENT_ID: NULL
BACKTRACE: NULL
TM_DELTA_TIME: 83401463
TM_DELTA_CPU_TIME: 483300
TM_DELTA_DB_TIME: 590180
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
TX_ID: NULL
BLOCKING_SESSION_ID: NULL
TABLET_ID: NULL
PROXY_SID: 2305843009213708800
DELTA_READ_IO_REQUESTS: 0
DELTA_READ_IO_BYTES: 0
DELTA_WRITE_IO_REQUESTS: 0
DELTA_WRITE_IO_BYTES: 0