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 records of all OBServer nodes 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 user ID 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. Valid values:
|
| SESSION_STATE | VARCHAR2(7) | NO | The session state. Valid values:
|
| SQL_ID | VARCHAR2(32) | YES | The SQL ID. |
| PLAN_ID | NUMBER | 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 | VARCHAR2(64) | YES | 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 to associate the waiting event with other tables. |
| EVENT_ID | NUMBER | YES | The ID of the current waiting event. |
| P1TEXT | VARCHAR2(64) | NO | The name of parameter 1 of the waiting event. The name varies with the value of the EVENT field. |
| P1 | NUMBER | NO | The value of parameter 1 of the waiting event. |
| P2TEXT | VARCHAR2(64) | NO | The name of parameter 2 of the waiting event. The name varies with the value of the EVENT field. |
| P2 | NUMBER | NO | The value of parameter 2 of the waiting event. |
| P3TEXT | VARCHAR2(64) | NO | The name of parameter 3 of the waiting event. The name varies with the value of the EVENT field. |
| P3 | NUMBER | NO | The value of parameter 3 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 to associate the waiting event with other tables. |
| TIME_WAITED | NUMBER | NO | The total waiting time of the waiting event, in microseconds (us). |
| SQL_PLAN_LINE_ID | NUMBER | YES | The line number of the SQL operator in the SQL plan at the time the sample was taken. |
| GROUP_ID | NUMBER | YES | The ID of the resource group to which the session belongs. |
| PLAN_HASH | NUMBER | YES | The plan hash of the current SQL command. |
| THREAD_ID | NUMBER | YES | The thread ID of the current active session. |
| STMT_TYPE | NUMBER | YES | The SQL type of the current active session. |
| TIME_MODEL | NUMBER | NO | The time model information. It 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 the 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 fetching values from an auto-increment column or a sequence at the time the sample was taken. |
| IN_COMMITTING | VARCHAR2(1) | NO | Indicates whether the sample was taken during the transaction commit phase. |
| IN_STORAGE_READ | VARCHAR2(1) | NO | Indicates whether the sample was taken during the storage read phase. |
| IN_STORAGE_WRITE | VARCHAR2(1) | NO | Indicates whether the sample was taken during the storage write phase. |
| IN_REMOTE_DAS_EXECUTION | VARCHAR2(1) | NO | Indicates whether the sample was taken during the DAS remote execution phase. |
| IN_FILTER_ROWS | VARCHAR2(1) | NO | Indicates whether the sample was taken during the storage pushdown execution phase. |
| IN_RPC_ENCODE | VARCHAR2(1) | NO | The serialization operation being performed on the current SQL statement. |
| IN_RPC_DECODE | VARCHAR2(1) | NO | The deserialization operation being performed on the current SQL statement. |
| IN_CONNECTION_MGR | VARCHAR2(1) | NO | The connection operation being performed on the current SQL statement. |
| PROGRAM | VARCHAR2(64) | YES | The name of the program that is currently being executed at the sampling point:
|
| MODULE | VARCHAR2(64) | YES | The MODULE value recorded by the session at the sampling point, which is set by using the DBMS_APPLICATION_INFO.SET_MODULE package. |
| ACTION | VARCHAR2(64) | YES | The ACTION value recorded by the session at the sampling point, which is set by using the DBMS_APPLICATION_INFO.SET_ACTION package. |
| CLIENT_ID | VARCHAR2(64) | YES | The CLIENT_ID value recorded by the session at the sampling point, which is set by using the DBMS_SESSION.set_identifier package. |
| BACKTRACE | VARCHAR2(512) | YES | A field for debugging. It records the code call stack at the time of the event. The value of this field is always NULL. |
| TM_DELTA_TIME | NUMBER | YES | The time interval for calculating the time model, in microseconds. |
| TM_DELTA_CPU_TIME | NUMBER | YES | The amount of time spent on the CPU during the TM_DELTA_TIME period. |
| TM_DELTA_DB_TIME | NUMBER | YES | The amount of time spent on database calls during the TM_DELTA_TIME period. |
| TOP_LEVEL_SQL_ID | CHAR(32) | YES | 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 | YES | The OBJECT ID of the top-level PL statement. |
| PLSQL_ENTRY_SUBPROGRAM_ID | NUMBER | YES | The Sub project ID of the top-level PL statement. |
| PLSQL_ENTRY_SUBPROGRAM_NAME | VARCHAR2(32) | YES | The Sub project name of the top-level PL statement. |
| PLSQL_OBJECT_ID | NUMBER | YES | The ID of the PL object being executed. |
| PLSQL_SUBPROGRAM_ID | NUMBER | YES | The ID of the PL subprogram being executed. |
| PLSQL_SUBPROGRAM_NAME | VARCHAR2(32) | YES | The name of the PL subprogram being executed. |
| TX_ID | NUMBER | YES | The ID of the current transaction. |
| BLOCKING_SESSION_ID | NUMBER | YES | If the current session is blocked, the ID of the session that blocks it. This field is effective only in lock conflict scenarios, displaying the ID of the session holding the lock
NoteFor V4.4.x, this field is reserved and its default value is NULL. |
| TABLET_ID | NUMBER | YES | The ID of the tablet being processed by the current SQL statement. |
| PROXY_SID | NUMBER | YES | The ID of the proxy session. |
| 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 points.
Note
|
| DELTA_WRITE_IO_BYTES | NUMBER | NO | The total size of files written between two sampling points.
Note
|
| WEIGHT | NUMBER | NO | The number of times the same tenant and action occur in the time range corresponding to this WR record.
NoteFor V4.4.x, this field was introduced in V4.4.2. |
| IS_WR_WEIGHT_SAMPLE | CHAR(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 all OBServer nodes in the current tenant.
obclient(SYS@oracle001)[SYS]> SELECT * FROM SYS.GV$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: 859959
SAMPLE_TIME: 09-JAN-26 11.24.26.068668 AM
CON_ID: 1004
USER_ID: 0
SESSION_ID: 2305843009213714606
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: 140696681705072
P2TEXT: NULL
P2: 0
P3TEXT: NULL
P3: 0
WAIT_CLASS: CONCURRENCY
WAIT_CLASS_ID: 104
TIME_WAITED: 99821
SQL_PLAN_LINE_ID: NULL
GROUP_ID: 0
PLAN_HASH: NULL
THREAD_ID: 95928
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: T1004_LogService
MODULE: LogRestoreService
ACTION: RemoteLogWriter
CLIENT_ID: NULL
BACKTRACE: NULL
TM_DELTA_TIME: 998489
TM_DELTA_CPU_TIME: 239
TM_DELTA_DB_TIME: 998489
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: 2305843009213714606
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 (0.028 sec)