Note
This view is available starting with V4.0.0. The view name was changed from V$PLAN_CACHE_PLAN_STAT to V$OB_PLAN_CACHE_PLAN_STAT.
Purpose
The V$OB_PLAN_CACHE_PLAN_STAT view displays the status of each cached object in the plan cache of the current OBServer node for the current tenant.
Notice
This view caches not only SQL plan objects but also PL objects such as anonymous blocks, PL packages, and PL functions. Some fields are only valid for specific object types.
Columns
| Column | Type | Nullable | Description |
|---|---|---|---|
| TENANT_ID | NUMBER(38) | NO | The tenant ID. |
| SVR_IP | VARCHAR2(46) | NO | The IP address of the server. |
| SVR_PORT | NUMBER(38) | NO | The port number of the server. |
| PLAN_ID | NUMBER(38) | NO | The ID of the cached object. |
| SQL_ID | VARCHAR2(32) | NO | The SQL ID of the cached object. If the cached object is a PL object, this field is NULL. |
| TYPE | NUMBER(38) | NO | For SQL plans, this field indicates the type of the plan:
|
| IS_BIND_SENSITIVE | NUMBER(38) | NO | Indicates whether the plan requires the ACS to be opened. |
| IS_BIND_AWARE | NUMBER(38) | NO | Indicates whether the ACS is opened for the plan. |
| DB_ID | NUMBER(38) | NO | The ID of the database. |
| STATEMENT | CLOB | NO | For SQL plans, this field contains the parameterized SQL statement. For anonymous block objects, this field contains the parameterized anonymous block statement. This field is invalid for other objects. |
| QUERY_SQL | CLOB | NO | For SQL plans, this field contains the original SQL statement queried when the plan was first loaded. For anonymous block objects, this field contains the parameterized anonymous block statement. |
| SPECIAL_PARAMS | VARCHAR2(4096) | NO | The values of the non-parameterized parameters. |
| PARAM_INFOS | CLOB | NO | The parameterization information. |
| SYS_VARS | VARCHAR2(4096) | NO | The values of the system variables that affect the cached object. |
| PLAN_HASH | NUMBER(38) | NO | The hash value of the SQL plan. |
| FIRST_LOAD_TIME | TIMESTAMP(6) WITH LOCAL TIME ZONE | NO | The time when the plan was first loaded. |
| SCHEMA_VERSION | NUMBER(38) | NO | The schema version number. |
| LAST_ACTIVE_TIME | TIMESTAMP(6) WITH LOCAL TIME ZONE | NO | The last execution time. |
| AVG_EXE_USEC | NUMBER(38) | NO | The average execution time, in microseconds. |
| SLOWEST_EXE_TIME | TIMESTAMP(6) WITH LOCAL TIME ZONE | NO | The timestamp of the slowest execution. |
| SLOWEST_EXE_USEC | NUMBER(38) | NO | The execution time of the slowest execution. |
| SLOW_COUNT | NUMBER(38) | NO | The number of times the SQL plan became a slow query. |
| HIT_COUNT | NUMBER(38) | NO | The number of times the plan was hit. |
| PLAN_SIZE | NUMBER(38) | NO | The memory size occupied by the cached object. |
| EXECUTIONS | NUMBER(38) | NO | The number of executions. |
| DISK_READS | NUMBER(38) | NO | The total number of physical reads across all executions. |
| DIRECT_WRITES | NUMBER(38) | NO | The total number of disk writes. |
| BUFFERS_GETS | NUMBER(38) | NO | The total number of logical reads. |
| APPLICATION_WAIT_TIME | NUMBER(38) | NO | The total time spent on all Application events, in microseconds. |
| CONCURRENCY_WAIT_TIME | NUMBER(38) | NO | The total time spent on all Concurrency events, in microseconds. |
| USER_IO_WAIT_TIME | NUMBER(38) | NO | The total time spent on all user_io events, in microseconds. |
| ROWS_PROCESSED | NUMBER(38) | NO | The total number of rows processed by the query or modified in the table. |
| ELAPSED_TIME | NUMBER(38) | NO | The total time from when the request was received to when the execution was completed, in microseconds. |
| CPU_TIME | NUMBER(38) | NO | The total CPU time consumed by the execution, in microseconds. |
| LARGE_QUERYS | NUMBER(38) | NO | The number of queries identified as large queries. |
| DELAYED_LARGE_QUERYS | NUMBER(38) | NO | The number of large queries that were identified and added to the large query queue. |
| DELAYED_PX_QUERYS | NUMBER(38) | NO | The number of parallel queries that were returned to the queue for retry. |
| OUTLINE_VERSION | NUMBER(38) | NO | The outline version number. |
| OUTLINE_ID | NUMBER(38) | NO | The ID of the outline. -1 indicates that the plan was not generated using an outline. |
| OUTLINE_DATA | CLOB | NO | The outline information corresponding to the plan. |
| HINTS_INFO | CLOB | NO | The hint information of the SQL plan. |
| HINTS_ALL_WORKED | NUMBER(38) | NO | Indicates whether all hints in the SQL plan are effective. |
| ACS_SEL_INFO | CLOB | NO | The selection rate space corresponding to the current ACS plan. |
| TABLE_SCAN | NUMBER(38) | NO | Indicates whether the query is a primary key scan. |
| EVOLUTION | NUMBER(38) | NO | Indicates whether the execution plan is evolving. |
| EVO_EXECUTIONS | NUMBER(38) | NO | The number of evolutions. |
| EVO_CPU_TIME | NUMBER(38) | NO | The total CPU time consumed during evolution, in microseconds. |
| TIMEOUT_COUNT | NUMBER(38) | NO | The number of timeouts. |
| PS_STMT_ID | NUMBER(38) | NO | The Prepare ID corresponding to the request:
|
| SESSID | NUMBER(38) | NO | The Session ID of the cache object. For V4.3.x:
|
| TEMP_TABLES | CLOB | NO | The name of the temporary table in the SQL plan. If there is no temporary table, this field is empty. |
| IS_USE_JIT | NUMBER(38) | NO | Indicates whether the SQL plan is enabled for expression compilation. |
| OBJECT_TYPE | CLOB | NO | The type of the cached object. Valid values:
|
| PL_SCHEMA_ID | NUMBER(38) | NO | For non-anonymous PL objects, this field is the schema ID of the cached object. For anonymous blocks, this field is the same as ps_stmt_id. For SQL plans, this field is meaningless. |
| IS_BATCHED_MULTI_STMT | NUMBER(38) | NO | Indicates whether the plan is optimized for Batched Multi Stmt. |
| RULE_NAME | VARCHAR2(256) | NO | The name of the rule. |
| PLAN_STATUS | VARCHAR2(8) | NO | Indicates the status of the plan, which is either ACTIVE or INACTIVE. |
| ADAPTIVE_FEEDBACK_TIMES | NUMBER(38) | NO | The number of consecutive positive or negative feedbacks. |
| FIRST_GET_PLAN_TIME | NUMBER(38) | NO | The time when the query was hard parsed. |
| FIRST_EXE_USEC | NUMBER(38) | NO | The time when the query was first executed. |
| FORMAT_SQL_ID | VARCHAR2(32) | NO | The Format SQL ID of the current plan.
NoteThis field is available starting with V4.4.0. |
| CACHE_NODE_ID | NUMBER(38) | NO | The ID of the Cache Node to which the object belongs.
NoteThis field is available starting with V4.6.0. |
| PCV_ID | NUMBER(38) | NO | The ID of the Plan Cache Value to which the object belongs.
NoteThis field is available starting with V4.6.0. |
| PLAN_SET_ID | NUMBER(38) | NO | The ID of the Plan Set to which the object belongs.
NoteThis field is available starting with V4.6.0. |
| CREATE_REASON | VARCHAR2(16384) | NO | The reason why the plan was added.
NoteThis field is available starting with V4.6.0. |
Sample query
The status of each cached object in the plan cache of the current tenant on the current OBServer node.
obclient [SYS]> SELECT * FROM SYS.V$OB_PLAN_CACHE_PLAN_STAT WHERE ROWNUM =1\G
The query result is as follows:
*************************** 1. row ***************************
TENANT_ID: 1004
SVR_IP: 172.xx.xxx.xxx
SVR_PORT: 2882
PLAN_ID: 8
SQL_ID: D9EB4937E65F94AA38F6B0FE72B06D13
TYPE: 1
IS_BIND_SENSITIVE: 0
IS_BIND_AWARE: 0
DB_ID: 201001
STATEMENT: SELECT column_value FROM __all_core_table WHERE TABLE_NAME = ? AND COLUMN_NAME = ?
QUERY_SQL: SELECT column_value FROM __all_core_table WHERE TABLE_NAME = '__all_global_stat' AND COLUMN_NAME = 'snapshot_gc_scn'
SPECIAL_PARAMS: NULL
PARAM_INFOS: {1,0,0,-1,22},{1,0,0,-1,22}
SYS_VARS: 45,45,4194304,+08:00,2,4,1,0,0,3,1,0,1,10485760,1,0,YYYY-MM-DD HH24:MI:SS,YYYY-MM-DD HH24:MI:SS.FF,YYYY-MM-DD HH24:MI:SS.FF TZR TZD,BINARY,BINARY,AL32UTF8,AL16UTF16,BYTE,FALSE,1,100,64,200,0,13,NULL,1,1,1,1,1,0,0,0,1000,BLOOM_FILTER,RANGE,IN,1,17180000512,17180000512,1,0,0,45,0,0,2,
PLAN_HASH: 12254811659671915614
FIRST_LOAD_TIME: 08-JUL-25 02.01.32.823035 PM
SCHEMA_VERSION: 1
LAST_ACTIVE_TIME: 17-JUL-25 10.14.48.217716 AM
AVG_EXE_USEC: 554
SLOWEST_EXE_TIME: 11-JUL-25 02.00.08.545621 AM
SLOWEST_EXE_USEC: 77775
SLOW_COUNT: 0
HIT_COUNT: 254051
PLAN_SIZE: 57600
EXECUTIONS: 254051
DISK_READS: 502
DIRECT_WRITES: 0
BUFFERS_GETS: 2213
APPLICATION_WATI_TIME: 0
CONCURRENCY_WAIT_TIME: 0
USER_IO_WAIT_TIME: 0
ROWS_PROCESSED: 254051
ELAPSED_TIME: 140811166
CPU_TIME: 30262004
LARGE_QUERYS: 0
DELAYED_LARGE_QUERYS: 0
DELAYED_PX_QUERYS: 0
OUTLINE_VERSION: 0
OUTLINE_ID: -1
OUTLINE_DATA: /*+BEGIN_OUTLINE_DATA INDEX(@"SEL$1" "oceanbase"."__all_core_table"@"SEL$1" "primary") OPTIMIZER_FEATURES_ENABLE('4.4.0.0') END_OUTLINE_DATA*/
HINTS_INFO: /*+ */
HINTS_ALL_WORKED: 1
ACS_SEL_INFO: NULL
TABLE_SCAN: 0
EVOLUTION: 0
EVO_EXECUTIONS: 0
EVO_CPU_TIME: 0
TIMEOUT_COUNT: 0
PS_STMT_ID: -1
SESSID: 0
TEMP_TABLES: NULL
IS_USE_JIT: 0
OBJECT_TYPE: SQL_PLAN
PL_SCHEMA_ID: 0
IS_BATCHED_MULTI_STMT: 0
RULE_NAME: NULL
PLAN_STATUS: ACTIVE
ADAPTIVE_FEEDBACK_TIMES: 0
FIRST_GET_PLAN_TIME: NULL
FIRST_EXE_USEC: NULL
FORMAT_SQL_ID: CC42DE6C11EC4E8C9077BA12970047CE
CACHE_NODE_ID: 1
PCV_ID: 1
PLAN_SET_ID: 1
CREATE_REASON: Cache key not exists, cache_node_id: -1.
1 row in set