Note
This view is available starting with V4.2.1.
Purpose
The oceanbase.DBA_WR_ACTIVE_SESSION_HISTORY view displays the persisted 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 V4.2.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.
NoteThis field is available starting with V4.2.2. |
| 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 at the time of sampling. NULL is returned if there is no corresponding operator. |
| GROUP_ID | bigint(20) | YES | The group information of the sampling point.
NoteThis field is available starting with V4.2.3. |
| PLAN_HASH | bigint(20) unsigned | YES | The plan hash corresponding to the executed SQL command.
Note
|
| THREAD_ID | bigint(20) | YES | The ID of the thread where the active session is located.
Note
|
| STMT_TYPE | bigint(20) | YES | The SQL type of the active session.
Note
|
| TIME_MODEL | bigint(20) unsigned | YES | Information about the time model. |
| IN_PARSE | varchar(1) | NO | Indicates whether the current session is parsing an SQL statement at the time of sampling. |
| IN_PL_PARSE | varchar(1) | NO | Indicates whether the current session is parsing an SQL PL statement at the time of sampling. |
| IN_PLAN_CACHE | varchar(1) | NO | Indicates whether the current session is caching a plan at the time of sampling. |
| IN_SQL_OPTIMIZE | varchar(1) | NO | Indicates whether the current session is optimizing an SQL statement at the time of sampling. |
| IN_SQL_EXECUTION | varchar(1) | NO | Indicates whether the current session is executing an SQL statement at the time of sampling. |
| IN_PX_EXECUTION | varchar(1) | NO | Indicates whether the current session is executing an SQL statement in parallel at the time of 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 fetching values from an auto-increment column or a sequence at the time of 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.
NoteThis field is available starting with V4.2.2. |
| IN_RPC_ENCODE | varchar(1) | NO | The serialization operation being performed by the current SQL statement
NoteThis column is available starting with V4.2.5 for V4.2.x. |
| IN_RPC_DECODE | varchar(1) | NO | The deserialization operation being performed by the current SQL statement
NoteThis column is available starting with V4.2.5 for V4.2.x. |
| IN_CONNECTION_MGR | varchar(1) | NO | The link creation operation being performed by the current SQL statement
NoteThis column is available starting with V4.2.5 for V4.2.x. |
| PROGRAM | varchar(64) | YES | The name of the program being executed at the sampling point:
NoteThis column is available starting with V4.2.2. |
| MODULE | varchar(64) | YES | The MODULE value recorded in the current SESSION at the sampling moment. It is set by using the DBMS_APPLICATION_INFO.SET_MODULE package. |
| ACTION | varchar(64) | YES | The ACTION value recorded in the current SESSION at the sampling moment. It is set by using the DBMS_APPLICATION_INFO.SET_ACTION package. |
| CLIENT_ID | varchar(64) | YES | The CLIENT_ID value recorded in the current SESSION at the sampling moment. It is set by using the DBMS_APPLICATION_INFO.set_identifier package. |
| BACKTRACE | varchar(512) | YES | An auxiliary debugging field 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 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
NoteThis column is available starting with V4.2.2. |
| TM_DELTA_CPU_TIME | bigint(20) | YES | The amount of time spent on the CPU during the TM_DELTA_TIME period in the past
NoteThis column is available starting with V4.2.2. |
| TM_DELTA_DB_TIME | bigint(20) | YES | The amount of time spent on database calls during the TM_DELTA_TIME period in the past
NoteThis column is available starting with V4.2.2. |
| TOP_LEVEL_SQL_ID | varchar(32) | YES | The top-level SQL ID
NoteThis column is available starting with V4.2.2. |
| IN_PLSQL_COMPILATION | varchar(1) | NO | The current PL compilation status: Y/N
NoteThis column is available starting with V4.2.2. |
| IN_PLSQL_EXECUTION | varchar(1) | NO | The current PL execution status: Y/N
NoteThis column is available starting with V4.2.2. |
| PLSQL_ENTRY_OBJECT_ID | bigint(20) | YES | The OBJECT ID of the top-level PL
NoteThis column is available starting with V4.2.2. |
| PLSQL_ENTRY_SUBPROGRAM_ID | bigint(20) | YES | The Sub project ID of the top-level PL
NoteThis column is available starting with V4.2.2. |
| PLSQL_ENTRY_SUBPROGRAM_NAME | varchar(32) | YES | The Sub project name of the top-level PL
NoteThis column is available starting with V4.2.2. |
| PLSQL_OBJECT_ID | bigint(20) | YES | The object ID of the PL being executed
NoteThis column is available starting with V4.2.2. |
| PLSQL_SUBPROGRAM_ID | bigint(20) | YES | The subprogram ID of the PL being executed
NoteThis column is available starting with V4.2.2. |
| PLSQL_SUBPROGRAM_NAME | varchar(32) | YES | The subprogram name of the PL being executed
NoteThis column is available starting with V4.2.2. |
| BLOCKING_SESSION_ID | bigint(20) | YES | If the current session is blocked, displays the session ID of the session that blocks the current session. This column is effective only in lock conflict scenarios, and displays the session ID of the session that holds the lock
Note
|
| TABLET_ID | bigint(20) | YES | The ID of the tablet that is currently being processed by the SQL query
Note
|
| PROXY_SID | bigint(20) | YES | The ID of the proxy session
Note
|
| TX_ID | bigint(20) | YES | The ID of the current transaction
Note
|
| DELTA_READ_IO_REQUESTS | bigint(20) | YES | The number of read operations between two sampling intervals
NoteThis column is available starting with V4.2.5 BP3 for V4.2.x. |
| DELTA_READ_IO_BYTES | bigint(20) | YES | The total size of files read between two sampling intervals
NoteThis column is available starting with V4.2.5 BP3 for V4.2.x. |
| DELTA_WRITE_IO_REQUESTS | bigint(20) | YES | The number of write operations between two sampling intervals
NoteThis column is available starting with V4.2.5 BP3 for V4.2.x. |
| DELTA_WRITE_IO_BYTES | bigint(20) | YES | The total size of files written between two sampling intervals
NoteThis column is available starting with V4.2.5 BP3 for V4.2.x. |
Sample query
Query the ASH data persisted for the current tenant.
obclient [oceanbase]> SELECT * FROM oceanbase.DBA_WR_ACTIVE_SESSION_HISTORY LIMIT 1\G
The query result is as follows:
*************************** 1. row ***************************
CLUSTER_ID: 10001
TENANT_ID: 1002
SNAP_ID: 1
SVR_IP: xx.xx.xx.xx
SVR_PORT: 2882
SAMPLE_ID: 740
SESSION_ID: -9223372036854729597
SAMPLE_TIME: 2025-02-28 09:43:43.809287
USER_ID: 200001
SESSION_TYPE: 1
SESSION_STATE: WAITING
SQL_ID:
TRACE_ID: YBXXXXXXXX-000XXXXXXXXXXXX-0-0
EVENT_NO: 29
EVENT_ID: 15102
TIME_WAITED: 199579
P1: 200000
P2: 0
P3: 0
SQL_PLAN_LINE_ID: NULL
GROUP_ID: 0
PLAN_HASH: NULL
THREAD_ID: 82046
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: T1002_LogService
MODULE: LOCAL INNER SQL EXEC
ACTION: NULL_INNER_SQL
CLIENT_ID: NULL
BACKTRACE: NULL
PLAN_ID: 0
TM_DELTA_TIME: 739151
TM_DELTA_CPU_TIME: 165
TM_DELTA_DB_TIME: 165
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
BLOCKING_SESSION_ID: NULL
TABLET_ID: NULL
PROXY_SID: -9223372036854729597
TX_ID: NULL
DELTA_READ_IO_REQUESTS: 0
DELTA_READ_IO_BYTES: 0
DELTA_WRITE_IO_REQUESTS: 0
DELTA_WRITE_IO_BYTES: 0
1 row in set (0.093 sec)