Note
This view is available starting with V4.2.1.
Purpose
The DBA_WR_ACTIVE_SESSION_HISTORY view displays the persistent ASH data of the current tenant.
Columns
Column |
Type |
Nullable? |
Description |
|---|---|---|---|
| CLUSTER_ID | bigint(20) | NO | The cluster ID. |
| TENANT_ID | bigint(20) | NO | The tenant ID. |
| SNAP_ID | bigint(20) | NO | The snapshot ID. |
| SVR_IP | varchar(46) | NO | The IP address of the node. |
| SVR_PORT | bigint(20) | NO | The port number of the node. |
| SAMPLE_ID | bigint(20) | NO | The sampling ID. |
| SESSION_ID | bigint(20) | NO | The ID of the sampled session. For V4.3.x:
|
| SAMPLE_TIME | timestamp(6) | NO | The sampling time. |
| USER_ID | bigint(20) | YES | The user ID of the sampled session. |
| SESSION_TYPE | tinyint(4) | YES | The session type.
|
| SESSION_STATE | varchar(7) | NO | The session state at the time of sampling.
|
| SQL_ID | varchar(32) | YES | The SQL ID. |
| TRACE_ID | varchar(64) | YES | The TRACE_ID. |
| EVENT_NO | bigint(20) | YES | The internal number of the waiting event, which is used for cross-table queries. |
| EVENT_ID | bigint(20) | YES | The ID of the current waiting event.
Note
|
| TIME_WAITED | bigint(20) | YES | The total waiting time of the waiting event, in microseconds (us). |
| P1 | bigint(20) | YES | The value of the first parameter of the waiting event. |
| P2 | bigint(20) | YES | The value of the second parameter of the waiting event. |
| P3 | bigint(20) | YES | The value of the third parameter of the waiting event. |
| SQL_PLAN_LINE_ID | bigint(20) | YES | The ID of the SQL operator corresponding to the sampled SQL. If no corresponding operator exists, the value is NULL. |
| GROUP_ID | bigint(20) | YES | The ID of the resource group to which the session belongs.
Note
|
| PLAN_HASH | bigint(20) unsigned | YES | The plan hash of the executed SQL command.
Note
|
| THREAD_ID | bigint(20) | YES | The ID of the thread to which the active session belongs.
Note
|
| STMT_TYPE | bigint(20) | YES | The SQL type of the active session.
Note
|
| TX_ID | bigint(20) | YES | The ID of the current transaction.
Note
|
| BLOCKING_SESSION_ID | bigint(20) | YES | If the current session is blocked, this field displays the ID of the session that blocks it. Currently, this field is effective only in lock conflict scenarios, and it displays the ID of the session that holds the lock.
Note
|
| TIME_MODEL | bigint(20) unsigned | YES | The information related to the TIME MODEL. |
| IN_PARSE | varchar(1) | NO | Indicates whether the current session is performing SQL parsing at the time of sampling. |
| IN_PL_PARSE | varchar(1) | NO | Indicates whether the current session is performing SQL PL parsing at the time of sampling. |
| IN_PLAN_CACHE | varchar(1) | NO | Indicates whether the current session is performing plan caching at the time of sampling. |
| IN_SQL_OPTIMIZE | varchar(1) | NO | Indicates whether the current session is performing SQL optimization at the time of sampling. |
| IN_SQL_EXECUTION | varchar(1) | NO | Indicates whether the current session is performing SQL execution at the time of sampling. |
| IN_PX_EXECUTION | varchar(1) | NO | Indicates whether the current session is performing parallel execution of an SQL statement during sampling. 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 current session is loading values from 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 push-down execution phase
Note
|
| IN_FILTER_ROWS | varchar(1) | NO | Indicates whether the current sampling point is in the storage push-down execution phase |
| IN_RPC_ENCODE | varchar(1) | NO | Indicates whether the current SQL statement is undergoing serialization. |
| IN_RPC_DECODE | varchar(1) | NO | Indicates whether the current SQL statement is undergoing deserialization. |
| IN_CONNECTION_MGR | varchar(1) | NO | Indicates whether the current SQL statement is establishing a connection. |
| PROGRAM | varchar(64) | YES | The name of the program being executed at the current sampling point:
Note
|
| MODULE | varchar(64) | YES | The MODULE value recorded for the current session at the sampling point, set by the DBMS_APPLICATION_INFO.SET_MODULE package. |
| ACTION | varchar(64) | YES | The ACTION value recorded for the current session at the sampling point, set by the DBMS_APPLICATION_INFO.SET_ACTION package. |
| CLIENT_ID | varchar(64) | YES | The CLIENT_ID value recorded for the current session at the sampling point, set by the DBMS_SESSION.set_identifier package. |
| BACKTRACE | varchar(512) | YES | An auxiliary field for debugging, used to record the code call stack at the time of the event. |
| PLAN_ID | bigint(20) | YES | The plan ID of the sampled SQL statement in the plan cache, used to associate the sampling point with the plan. |
| TM_DELTA_TIME | bigint(20) | YES | The time interval for calculating the time model, in microseconds
Note
|
| TM_DELTA_CPU_TIME | bigint(20) | YES | The amount of time spent on the CPU during the TM_DELTA_TIME time period in the past
Note
|
| TM_DELTA_DB_TIME | bigint(20) | YES | The amount of time spent on database calls during the TM_DELTA_TIME time period in the past
Note
|
| TOP_LEVEL_SQL_ID | varchar(32) | YES | The ID of the top-level SQL statement
Note
|
| IN_PLSQL_COMPILATION | varchar(1) | NO | The PL compilation status: Y/N
Note
|
| IN_PLSQL_EXECUTION | varchar(1) | NO | The PL execution status: Y/N
Note
|
| PLSQL_ENTRY_OBJECT_ID | bigint(20) | YES | The OBJECT ID of the top-level PL statement
Note
|
| PLSQL_ENTRY_SUBPROGRAM_ID | bigint(20) | YES | The ID of the top-level PL subprogram.
Note
|
| PLSQL_ENTRY_SUBPROGRAM_NAME | varchar(32) | YES | The name of the top-level PL subprogram.
Note
|
| PLSQL_OBJECT_ID | bigint(20) | YES | The ID of the PL object currently being executed.
Note
|
| PLSQL_SUBPROGRAM_ID | bigint(20) | YES | The ID of the PL subprogram currently being executed.
Note
|
| PLSQL_SUBPROGRAM_NAME | varchar(32) | YES | The name of the PL subprogram currently being executed.
Note
|
| DELTA_READ_IO_REQUESTS | bigint(20) | YES | The number of read requests between two sampling intervals.
Note
|
| DELTA_READ_IO_BYTES | bigint(20) | YES | The total size of read files between two sampling intervals.
Note
|
| DELTA_WRITE_IO_REQUESTS | bigint(20) | YES | The number of write requests between two sampling intervals.
Note
|
| DELTA_WRITE_IO_BYTES | bigint(20) | YES | The total size of write files between two sampling intervals.
Note
|
| TABLET_ID | bigint(20) | YES | The ID of the tablet currently being processed by the SQL query.
Note
|
| PROXY_SID | bigint(20) | YES | The ID of the proxy session.
Note
|
Sample query
obclient [oceanbase]> SELECT * FROM oceanbase.DBA_WR_ACTIVE_SESSION_HISTORY limit 1\G
The result set is as follows:
*************************** 1. row ***************************
CLUSTER_ID: 10001
TENANT_ID: 1
SNAP_ID: 1
SVR_IP: xx.xx.xx.xx
SVR_PORT: 2882
SAMPLE_ID: 10
SESSION_ID: 468151435264
SAMPLE_TIME: 2024-12-09 11:01:34.824039
USER_ID: 200001
SESSION_TYPE: 1
SESSION_STATE: WAITING
SQL_ID: 17605A1DA6B6A2150E9FBCA5D4C7653A
TRACE_ID:
EVENT_NO: 99
EVENT_ID: 32003
TIME_WAITED: 0
P1: NULL
P2: 1
P3: 0
SQL_PLAN_LINE_ID: 0
GROUP_ID: 0
PLAN_HASH: 12254811659671915614
THREAD_ID: 1926
STMT_TYPE: NULL
TX_ID: NULL
BLOCKING_SESSION_ID: 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_PLSQL_COMPILATION: N
IN_PLSQL_EXECUTION: N
IN_FILTER_ROWS: N
IN_RPC_ENCODE: N
IN_RPC_DECODE: N
IN_CONNECTION_MGR: N
PROGRAM: RSAsyncTask
MODULE: NULL
ACTION: NULL
CLIENT_ID: NULL
BACKTRACE: NULL
PLAN_ID: 465
TM_DELTA_TIME: 45767216
TM_DELTA_CPU_TIME: 43553658
TM_DELTA_DB_TIME: 43620453
TOP_LEVEL_SQL_ID: NULL
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
DELTA_READ_IO_REQUESTS: 0
DELTA_READ_IO_BYTES: 0
DELTA_WRITE_IO_REQUESTS: 0
DELTA_WRITE_IO_BYTES: 0
TABLET_ID: 1
PROXY_SID: 468151435264
1 row in set (0.033 sec)