Note
- For V4.3.x, this view was introduced in V4.3.5.
- For V4.2.x, this view was introduced in V4.2.2.
Purpose
The V$OB_ACTIVE_SESSION_HISTORY view displays the active session history of the current OBServer node in all tenants.
Columns
| Column | Type | Nullable? | Description |
|---|---|---|---|
| SVR_IP | varchar(46) | NO | IP address of the server where the sample is located. |
| SVR_PORT | bigint(20) | NO | Port number of the server where the sample is located. |
| SAMPLE_ID | bigint(20) | NO | Unique ID of the sample on the local server. |
| SAMPLE_TIME | datetime | NO | Sampling time. |
| CON_ID | bigint(20) | NO | ID of the tenant. |
| USER_ID | bigint(20) | NO | ID of the user in the sampled session. |
| SESSION_ID | bigint(20) | NO | ID of the sampled session. For V4.3.x:
|
| SESSION_TYPE | varchar(10) | NO | Session type. Valid values:
|
| SESSION_STATE | varchar(7) | NO | Session status. Valid values:
|
| SQL_ID | varchar(32) | NO | ID of the SQL statement. |
| PLAN_ID | bigint(20) | NO | ID of the plan in the plan cache to which the sampled SQL statement belongs. This field is used to associate the sampling point with the plan. |
| TRACE_ID | varchar(64) | NO | Trace ID of the operator. |
| EVENT | varchar(64) | NO | Description of the wait event. |
| EVENT_NO | bigint(20) | NO | Internal ID of the wait event. This field is used for queries across tables. |
| EVENT_ID | bigint(20) | NO | ID of the wait event. |
| P1TEXT | varchar(64) | NO | Name of parameter 1 of the wait event. The name varies depending on the wait event. |
| P1 | bigint(20) | NO | Value of parameter 1 of the wait event. |
| P2TEXT | varchar(64) | NO | Name of parameter 2 of the wait event. The name varies depending on the wait event. |
| P2 | bigint(20) | NO | Value of parameter 2 of the wait event. |
| P3TEXT | varchar(64) | NO | Name of parameter 3 of the wait event. The name varies depending on the wait event. |
| P3 | bigint(20) | NO | Value of parameter 3 of the wait event. |
| WAIT_CLASS | varchar(64) | NO | Type of the wait event. |
| WAIT_CLASS_ID | bigint(20) | NO | ID of the wait event type. This field is used for queries across tables. |
| TIME_WAITED | bigint(20) | NO | Total wait time of the wait event, in microseconds (us). |
| SQL_PLAN_LINE_ID | bigint(20) | NO | Number of the SQL operator in the SQL plan when the session was sampled. |
| GROUP_ID | bigint(20) | NO | ID of the resource group to which the session belongs. |
| PLAN_HASH | bigint(20) unsigned | NO | Plan hash value of the current SQL statement. |
| THREAD_ID | bigint(20) | NO | ID of the thread where the active session is located. |
| STMT_TYPE | bigint(20) | NO | SQL type of the active session. |
| TIME_MODEL | bigint(20) | NO | time model information, which is a collection of values of all IN_XXX fields (such as IN_PARSE and IN_PL_PARSE). |
| IN_PARSE | varchar(1) | NO | Indicates whether the session is parsing an SQL statement when it is sampled. |
| IN_PL_PARSE | varchar(1) | NO | Indicates whether the session is parsing an PL/SQL statement when it is sampled. |
| IN_PLAN_CACHE | varchar(1) | NO | Indicates whether the session is matching a plan in the plan cache when it is sampled. |
| IN_SQL_OPTIMIZE | varchar(1) | NO | Indicates whether the session is optimizing an SQL statement when it is sampled. |
| IN_SQL_EXECUTION | varchar(1) | NO | Indicates whether the session is executing an SQL statement when it is sampled. |
| IN_PX_EXECUTION | varchar(1) | NO | Indicates whether the session is executing an SQL statement in parallel when it is sampled. When the session is in this state, it is also in the IN_SQL_EXECUTION state. |
| IN_SEQUENCE_LOAD | varchar(1) | NO | Indicates whether the session is loading a value from an auto-increment column or a sequence when it is sampled. |
| 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 remote DAS execution phase. |
| IN_FILTER_ROWS | varchar(1) | NO | Indicates whether the current sampling point is in the storage downpress execution phase. |
| IN_RPC_ENCODE | varchar(1) | NO | The serialization operation being performed by the current SQL. |
| IN_RPC_DECODE | varchar(1) | NO | The deserialization operation being performed by the current SQL. |
| IN_CONNECTION_MGR | varchar(1) | NO | The connection establishment operation being performed by the current SQL. |
| PROGRAM | varchar(64) | NO | Name of the program being executed at the current sampling point:
|
| MODULE | varchar(64) | NO | MODULE value recorded for the session when it is sampled. This field is set by the DBMS_APPLICATION_INFO.SET_MODULE package. |
| ACTION | varchar(64) | NO | ACTION value recorded for the session when it is sampled. This field is set by the DBMS_APPLICATION_INFO.SET_ACTION package. |
| CLIENT_ID | varchar(64) | NO | CLIENT_ID value recorded for the session when it is sampled. This field is set by the DBMS_SESSION.set_identifier package. |
| BACKTRACE | varchar(512) | NO | Auxiliary debugging field that records the code call stack when the event occurs. The value of this field is always NULL. |
| TM_DELTA_TIME | bigint(20) | NO | Time interval for calculating the time model, in microseconds. |
| TM_DELTA_CPU_TIME | bigint(20) | NO | CPU time spent in the past TM_DELTA_TIME period. |
| TM_DELTA_DB_TIME | bigint(20) | NO | Database call time spent in the past TM_DELTA_TIME period. |
| TOP_LEVEL_SQL_ID | varchar(32) | NO | ID of the top-level SQL statement. |
| IN_PLSQL_COMPILATION | varchar(1) | NO | PL compilation status: Y/N |
| IN_PLSQL_EXECUTION | varchar(1) | NO | PL execution status: Y/N |
| PLSQL_ENTRY_OBJECT_ID | bigint(20) | NO | OBJECT ID of the top-level PL. |
| PLSQL_ENTRY_SUBPROGRAM_ID | bigint(20) | NO | Subprogram ID of the top-level PL. |
| PLSQL_ENTRY_SUBPROGRAM_NAME | varchar(32) | NO | Subprogram name of the top-level PL. |
| PLSQL_OBJECT_ID | bigint(20) | NO | ID of the PL being executed. |
| PLSQL_SUBPROGRAM_ID | bigint(20) | NO | ID of the subprogram being executed. |
| PLSQL_SUBPROGRAM_NAME | varchar(32) | NO | Name of the subprogram being executed. |
| TX_ID | bigint(20) | NO | ID of the current transaction. |
| BLOCKING_SESSION_ID | bigint(20) | NO | ID of the session that blocks the current session. This field is displayed only in lock conflict scenarios, and displays the ID of the session that holds the lock. |
| TABLET_ID | bigint(20) | NO | ID of the tablet being processed by the current SQL statement. |
| PROXY_SID | bigint(20) | NO | ID of the proxy session. |
| TX_ID | bigint(20) | NO | Current transaction ID. |
| DELTA_READ_IO_REQUESTS | bigint(20) | NO | Number of reads between two samplings.
Note
|
| DELTA_READ_IO_BYTES | bigint(20) | NO | Total size of files read between two samplings.
Note
|
| DELTA_WRITE_IO_REQUESTS | bigint(20) | NO | Number of writes between two samplings.
Note
|
| DELTA_WRITE_IO_BYTES | bigint(20) | NO | Total size of files written between two samplings.
Note
|
| WEIGHT | bigint(20) | NO | Number of occurrences of the same tenant and action within the time range of this WR record.
NoteFor V4.4.x, this field was introduced in V4.4.2. |
| IS_WR_WEIGHT_SAMPLE | varchar(1) | NO | Indicates whether this column is an aggregated column for queue backlog waiting events.
NoteFor V4.4.x, this field was introduced in V4.4.2. |
Sample query
Query the active session history of the current OBServer node.
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: 909355
SAMPLE_TIME: 2026-01-09 13:56:36.148754
CON_ID: 1001
USER_ID: 0
SESSION_ID: 2305843009213713012
SESSION_TYPE: BACKGROUND
SESSION_STATE: WAITING
SQL_ID: NULL
PLAN_ID: 0
TRACE_ID: NULL
EVENT: default condition wait
EVENT_NO: 41
EVENT_ID: 15101
P1TEXT: address
P1: 140697920474736
P2TEXT:
P2: 0
P3TEXT:
P3: 0
WAIT_CLASS: CONCURRENCY
WAIT_CLASS_ID: 104
TIME_WAITED: 99808
SQL_PLAN_LINE_ID: NULL
GROUP_ID: 0
PLAN_HASH: NULL
THREAD_ID: 95777
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: 996882
TM_DELTA_CPU_TIME: 244
TM_DELTA_DB_TIME: 996882
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: 2305843009213713012
DELTA_READ_IO_REQUESTS: 0
DELTA_READ_IO_BYTES: 0
DELTA_WRITE_IO_REQUESTS: 0
DELTA_WRITE_IO_BYTES: 0
WEIGHT: 1
IS_WR_WEIGHT_SAMPLE: N
1 row in set (0.024 sec)
