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 V$OB_ACTIVE_SESSION_HISTORY view displays the active session history of the current OBServer node in the current tenant.
Columns
Column |
Type |
Nullable |
Description |
|---|---|---|---|
| SVR_IP | VARCHAR2(46) | NO | The IP address of the server to which the sample belongs. |
| SVR_PORT | NUMBER | NO | The port number of the server to which the sample belongs. |
| SAMPLE_ID | NUMBER | NO | The unique ID of the sample. |
| SAMPLE_TIME | TIMESTAMP(6) | NO | The time when the sample was taken. |
| CON_ID | NUMBER | NO | The tenant ID. |
| USER_ID | NUMBER | NO | The ID of the user of the session being sampled. |
| SESSION_ID | NUMBER | NO | The ID of the session being sampled. For V4.3.x:
|
| SESSION_TYPE | VARCHAR2(10) | NO | The session type:
|
| SESSION_STATE | VARCHAR2(7) | NO | The session state:
|
| SQL_ID | VARCHAR2(32) | NO | The SQL ID. |
| PLAN_ID | NUMBER | NO | The ID of the plan in the plan cache for the SQL statement sampled. This ID is used to associate the sampling point with the plan. |
| TRACE_ID | VARCHAR2(64) | NO | The trace ID of the operator. |
| EVENT | VARCHAR2(64) | NO | The description of the waiting event. |
| EVENT_NO | NUMBER | NO | The internal number of the waiting event. This number is used for cross-table queries. |
| EVENT_ID | NUMBER | NO | The ID of the current waiting event. |
| P1TEXT | VARCHAR2(64) | NO | The name of the first parameter of the waiting event. The name varies depending on the EVENT field. |
| P1 | NUMBER | NO | The value of the first parameter of the waiting event. |
| P2TEXT | VARCHAR2(64) | NO | The name of the second parameter of the waiting event. The name varies depending on the EVENT field. |
| P2 | NUMBER | NO | The value of the second parameter of the waiting event. |
| P3TEXT | VARCHAR2(64) | NO | The name of the third parameter of the waiting event. The name varies depending on the EVENT field. |
| P3 | NUMBER | NO | The value of the third parameter of the waiting event. |
| WAIT_CLASS | VARCHAR2(64) | NO | The type of the waiting event. |
| WAIT_CLASS_ID | NUMBER | NO | The ID of the type of the waiting event. This ID is used for cross-table queries. |
| TIME_WAITED | NUMBER | NO | The total waiting time of the waiting event, in microseconds (us). |
| SQL_PLAN_LINE_ID | NUMBER | NO | The line number of the SQL operator in the SQL plan at the time the sample was taken. |
| GROUP_ID | NUMBER | NO | The ID of the resource group to which the sample belongs. |
| PLAN_HASH | NUMBER | YES | The plan hash corresponding to the executed SQL statement. |
| THREAD_ID | NUMBER | YES | The ID of the thread to which the active session belongs. |
| STMT_TYPE | NUMBER | YES | The type of the SQL statement of the active session. |
| TIME_MODEL | NUMBER | NO | The time model information, which is a collection of data from all IN_XXX fields (such as IN_PARSE and IN_PL_PARSE). |
| IN_PARSE | VARCHAR2(1) | NO | Indicates whether the session is parsing an SQL statement at the time the sample was taken. |
| IN_PL_PARSE | VARCHAR2(1) | NO | Indicates whether the session is parsing an SQL PL statement at the time the sample was taken. |
| IN_PLAN_CACHE | VARCHAR2(1) | NO | Indicates whether the session is matching a plan in the plan cache at the time the sample was taken. |
| IN_SQL_OPTIMIZE | VARCHAR2(1) | NO | Indicates whether the session is optimizing the SQL statement at the time the sample was taken. |
| IN_SQL_EXECUTION | VARCHAR2(1) | NO | Indicates whether the session is executing an SQL statement at the time the sample was taken. |
| IN_PX_EXECUTION | VARCHAR2(1) | NO | Indicates whether the session is executing an SQL statement in parallel 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 | VARCHAR2(1) | NO | Indicates whether the session is performing an auto-increment column or SEQUENCE value operation during sampling. |
| IN_COMMITTING | VARCHAR2(1) | NO | Indicates whether the current sampling point is in the transaction commit phase. |
| IN_STORAGE_READ | VARCHAR2(1) | NO | Indicates whether the current sampling point is in the storage read phase. |
| IN_STORAGE_WRITE | VARCHAR2(1) | NO | Indicates whether the current sampling point is in the storage write phase. |
| IN_REMOTE_DAS_EXECUTION | VARCHAR2(1) | NO | Indicates whether the current sampling point is in the DAS remote execution phase. |
| IN_FILTER_ROWS | VARCHAR2(1) | NO | Indicates whether the current sampling point is in the storage push-down execution phase. |
| IN_RPC_ENCODE | VARCHAR2(1) | NO | Indicates whether the current SQL is performing a serialization operation. |
| IN_RPC_DECODE | VARCHAR2(1) | NO | Indicates whether the current SQL is performing a deserialization operation. |
| IN_CONNECTION_MGR | VARCHAR2(1) | NO | Indicates whether the current SQL is performing a connection operation. |
| PROGRAM | VARCHAR2(64) | NO | The name of the program being executed at the current sampling point:
|
| MODULE | VARCHAR2(64) | NO | The MODULE value recorded at the sampling point, set by the DBMS_APPLICATION_INFO.SET_MODULE package. |
| ACTION | VARCHAR2(64) | NO | The ACTION value recorded at the sampling point, set by the DBMS_APPLICATION_INFO.SET_ACTION package. |
| CLIENT_ID | VARCHAR2(64) | NO | The CLIENT_ID value recorded at the sampling point, set by the DBMS_SESSION.set_identifier package. |
| BACKTRACE | VARCHAR2(512) | NO | A 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 | NUMBER | NO | The time interval for calculating the time model, in microseconds. |
| TM_DELTA_CPU_TIME | NUMBER | NO | The amount of time spent on the CPU during the TM_DELTA_TIME time period. |
| TM_DELTA_DB_TIME | NUMBER | NO | The amount of time spent on database calls during the TM_DELTA_TIME time period. |
| TOP_LEVEL_SQL_ID | CHAR(32) | NO | The ID of the top-level SQL statement. |
| IN_PLSQL_COMPILATION | VARCHAR2(1) | NO | The PL compilation status: Y/N |
| IN_PLSQL_EXECUTION | VARCHAR2(1) | NO | The PL execution status: Y/N |
| PLSQL_ENTRY_OBJECT_ID | NUMBER | NO | The OBJECT ID of the top-level PL statement. |
| PLSQL_ENTRY_SUBPROGRAM_ID | NUMBER | NO | The Sub project ID of the top-level PL statement. |
| PLSQL_ENTRY_SUBPROGRAM_NAME | VARCHAR2(32) | NO | The Sub project name of the top-level PL statement. |
| PLSQL_OBJECT_ID | NUMBER | NO | The ID of the PL object being executed. |
| PLSQL_SUBPROGRAM_ID | NUMBER | NO | The ID of the PL subprogram being executed. |
| PLSQL_SUBPROGRAM_NAME | VARCHAR2(32) | NO | The name of the PL subprogram being executed. |
| TX_ID | NUMBER | NO | The ID of the current transaction. |
| BLOCKING_SESSION_ID | NUMBER | NO | If the current session is blocked, displays the session ID of the session blocking it. This field is effective only in lock conflict scenarios, showing the session ID holding the lock. |
| TABLET_ID | NUMBER | NO | The ID of the tablet being processed by the current SQL statement. |
| PROXY_SID | NUMBER | NO | The ID of the proxy session. |
| TX_ID | NUMBER | NO | The ID of the current transaction. |
| DELTA_READ_IO_REQUESTS | NUMBER | NO | The number of read requests between two sampling points.
Note
|
| DELTA_READ_IO_BYTES | NUMBER | NO | The total size of files read between two sampling points.
Note
|
| DELTA_WRITE_IO_REQUESTS | NUMBER | NO | The number of write requests between two sampling periods.
Note
|
| DELTA_WRITE_IO_BYTES | NUMBER | NO | The total size of files written between two sampling periods.
Note
|
| ROWKEY | varchar(320) | YES | The rowkey string of the locked conflicting row, indicating the specific row being waited on in the conflict-waiting sample. Truncated if it exceeds 320 bytes. Can be NULL.
NoteFor V5.0.x, this field is available starting with V5.0.1. |
| HOLDER_SQL_ID | varchar(32) | YES | The SQL_ID of the current locking SQL statement for the lock holder (holder). Can be NULL (when the holder has finished or when a reverse lookup fails).
NoteFor V5.0.x, this field is available starting with V5.0.1. |
| HOLDER_QUERY_SQL | varchar(200) | YES | The text of the SQL statement that caused the lock holder to acquire the lock, truncated to 200 bytes. This column is controlled by the _ob_enable_lock_diagnose_collect_query_sql parameter. If disabled by default, it is NULL.
NoteFor V5.0.x, this field is available starting with V5.0.1. |
| DATABASE_ID | bigint(20) | YES | The ID of the database where the session is currently located. An invalid value will be set to NULL.
NoteFor V5.0.x, this field is available starting with V5.0.1. |
Sample query
Query the active session history of the current OBServer node in the current tenant.
obclient [SYS]> SELECT * FROM SYS.V$OB_ACTIVE_SESSION_HISTORY WHERE ROWNUM = 1\G
The query result is as follows:
*************************** 1. row ***************************
SVR_IP: xx.xx.xx.xx
SVR_PORT: 2882
SAMPLE_ID: 628769
SAMPLE_TIME: 29-MAY-25 04.15.13.233653 PM
CON_ID: 1004
USER_ID: 200001
SESSION_ID: 4611686018587887275
SESSION_TYPE: BACKGROUND
SESSION_STATE: WAITING
SQL_ID: EC1E4162DDF070F6FE0E5BD0B2DAB6B6
PLAN_ID: 149247
TRACE_ID: YB42AC1E87E0-XXXXXXXXXXXXXX-0-0
EVENT: exec inner sql wait
EVENT_NO: 100
EVENT_ID: 30000
P1TEXT: wait inner sql class
P1: 0
P2TEXT: inner session id
P2: 4611686018587887275
P3TEXT: NULL
P3: 0
WAIT_CLASS: OTHER
WAIT_CLASS_ID: 100
TIME_WAITED: 0
SQL_PLAN_LINE_ID: 0
GROUP_ID: 0
PLAN_HASH: 7229639134749364469
THREAD_ID: 83439
STMT_TYPE: 1
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: T1004_LSRecoveryService
MODULE: LOCAL INNER SQL EXEC
ACTION: NULL_INNER_SQL
CLIENT_ID: NULL
BACKTRACE: NULL
TM_DELTA_TIME: 238
TM_DELTA_CPU_TIME: 130
TM_DELTA_DB_TIME: 208
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: 16124478
BLOCKING_SESSION_ID: 4611686018587887275
TABLET_ID: NULL
PROXY_SID: 4611686018587887275
DELTA_READ_IO_REQUESTS: 0
DELTA_READ_IO_BYTES: 0
DELTA_WRITE_IO_REQUESTS: 0
DELTA_WRITE_IO_BYTES: 0
ROWKEY: NULL
HOLDER_SQL_ID: NULL
HOLDER_QUERY_SQL: NULL
DATABASE_ID: NULL