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
This 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 | bigint(20) | NO | The tenant ID. |
| SVR_IP | varchar(46) | NO | The IP address of the server. |
| SVR_PORT | bigint(20) | NO | The port number of the server. |
| PLAN_ID | bigint(20) | NO | The ID of the cached object. |
| SQL_ID | varchar(32) | NO | The SQL ID of the cached object. If the cached object is a PL object, this field is NULL. |
| TYPE | bigint(20) | NO | The type of the cached object. For SQL plans, the value indicates the type of the plan:
|
| IS_BIND_SENSITIVE | bigint(20) | NO | Indicates whether the plan requires the ACS feature to be enabled. |
| IS_BIND_AWARE | bigint(20) | NO | Indicates whether the ACS feature is enabled for the plan. |
| DB_ID | bigint(20) unsigned | NO | The database ID. |
| STATEMENT | longtext | NO | For SQL plans, this field contains the parameterized SQL statement. For anonymous blocks, this field contains the parameterized anonymous block statement. This field is invalid for other objects. |
| QUERY_SQL | longtext | NO | For SQL plans, this field contains the original SQL statement queried when the plan was first loaded. For anonymous blocks, this field contains the parameterized anonymous block statement. |
| SPECIAL_PARAMS | varchar(4096) | NO | The values of parameters that cannot be parameterized. |
| PARAM_INFOS | longtext | NO | The parameterization information. |
| SYS_VARS | varchar(4096) | NO | The values of system variables that affect the plan. |
| CONFIGS | varchar(4096) | NO | The information about configuration items that affect the execution plan. |
| PLAN_HASH | bigint(20) unsigned | NO | The hash value of the SQL plan. |
| FIRST_LOAD_TIME | timestamp(6) | NO | The time when the plan was first loaded. |
| SCHEMA_VERSION | bigint(20) | NO | The schema version number. |
| LAST_ACTIVE_TIME | timestamp(6) | NO | The time when the plan was last executed. |
| AVG_EXE_USEC | bigint(20) | NO | The average execution time, in microseconds. |
| SLOWEST_EXE_TIME | timestamp(6) | NO | The timestamp of the slowest execution. |
| SLOWEST_EXE_USEC | bigint(20) | NO | The execution time of the slowest execution. |
| SLOW_COUNT | bigint(20) | NO | The number of times the current SQL plan has been identified as a slow query. |
| HIT_COUNT | bigint(20) | NO | The number of times the plan has been hit. |
| PLAN_SIZE | bigint(20) | NO | The size of the cached object in memory. |
| EXECUTIONS | bigint(20) | NO | The number of executions. |
| DISK_READS | bigint(20) | NO | The number of physical reads for all executions. |
| DIRECT_WRITES | bigint(20) | NO | The number of physical writes for all executions. |
| BUFFER_GETS | bigint(20) | NO | The number of logical reads for all executions. |
| APPLICATION_WAIT_TIME | bigint(20) unsigned | NO | The total time of all Application events, in microseconds. |
| CONCURRENCY_WAIT_TIME | bigint(20) unsigned | NO | The total time of all Concurrency events, in microseconds. |
| USER_IO_WAIT_TIME | bigint(20) unsigned | NO | The total time of all user_io events, in microseconds. |
| ROWS_PROCESSED | bigint(20) | NO | The time of all Schedule events. |
| ELAPSED_TIME | bigint(20) unsigned | NO | The time consumed from receiving the request to the end of execution, in microseconds. |
| CPU_TIME | bigint(20) unsigned | NO | The CPU time consumed by all executions, in microseconds. |
| LARGE_QUERYS | bigint(20) | NO | The number of times the query has been identified as a large query. |
| DELAYED_LARGE_QUERYS | bigint(20) | NO | The number of times the query has been identified as a large query and has been queued in the large query queue. |
| DELAYED_PX_QUERYS | bigint(20) | NO | The number of times a parallel query has been returned to the queue for retry. |
| OUTLINE_VERSION | bigint(20) | NO | The version number of the outline. |
| OUTLINE_ID | bigint(20) | NO | The ID of the outline. -1 indicates that the plan is not generated by using an outline. |
| OUTLINE_DATA | longtext | NO | The outline information corresponding to the plan. |
| ACS_SEL_INFO | longtext | NO | The selection rate space corresponding to the current ACS plan. |
| TABLE_SCAN | tinyint(4) | NO | Indicates whether the query is a primary key scan. |
| EVOLUTION | tinyint(4) | NO | Indicates whether the execution plan is evolving. |
| EVO_EXECUTIONS | bigint(20) | NO | The number of evolutions. |
| EVO_CPU_TIME | bigint(20) unsigned | NO | The total CPU time consumed during the evolution, in microseconds. |
| TIMEOUT_COUNT | bigint(20) | NO | The number of timeouts. |
| PS_STMT_ID | bigint(20) | NO | The Prepare ID corresponding to the request: -1: indicates that the SQL statement does not use the PS protocol.-1: indicates that the SQL statement uses the PS protocol, and the value is the unique identifier returned by the PS protocol for the statement. |
| SESSID | bigint(20) unsigned | NO | The Session ID of the cache object. For V4.2.x:
|
| TEMP_TABLES | longtext | NO | The names of temporary tables in the SQL plan. If no temporary tables exist, this field is empty. |
| IS_USE_JIT | tinyint(4) | NO | Indicates whether expression compilation is enabled in the SQL plan. |
| OBJECT_TYPE | longtext | NO | The type of the cache object: |
| HINTS_INFO | longtext | NO | The hint information of the SQL plan. |
| HINTS_ALL_WORKED | tinyint(4) | NO | Indicates whether all hints in the SQL plan have been applied. |
| PL_SCHEMA_ID | bigint(20) unsigned | NO | For non-anonymous PL objects, this field is the Schema ID of the cache object. For anonymous blocks, this field is the same as ps_stmt_id. For SQL plans, this field is meaningless. |
| IS_BATCHED_MULTI_STMT | tinyint(4) | NO | Indicates whether the plan is optimized for Batched Multistmt. |
| RULE_NAME | VARCHAR2(256) | NO | The name of the rule. |
Sample query
Query the status of each cached object in the plan cache of all tenants on the current OBServer node.
obclient [oceanbase]> SELECT * FROM oceanbase.V$OB_PLAN_CACHE_PLAN_STAT LIMIT 1\G
The query result is as follows:
*************************** 1. row ***************************
TENANT_ID: 1
SVR_IP: xx.xx.xx.xx
SVR_PORT: 2882
PLAN_ID: 1262
SQL_ID: 17605A1DA6B6A2150E9FBCA5D4C7653A
TYPE: 1
IS_BIND_SENSITIVE: 0
IS_BIND_AWARE: 0
DB_ID: 201001
STATEMENT: SELECT row_id, column_name, column_value FROM __all_core_table WHERE table_name = ? ORDER BY row_id, column_name
QUERY_SQL: SELECT row_id, column_name, column_value FROM __all_core_table WHERE table_name = '__all_global_stat' ORDER BY row_id, column_name
SPECIAL_PARAMS:
PARAM_INFOS: {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,
CONFIGS: 4,1,1,0,1,1,1,0,30,17180067074,1,0,0,1,3,0,10,1001,101,0,1,
PLAN_HASH: 12254811659671915614
FIRST_LOAD_TIME: 2025-04-15 14:48:44.753417
SCHEMA_VERSION: 1744699724625088
LAST_ACTIVE_TIME: 2025-04-18 16:33:50.835623
AVG_EXE_USEC: 109
SLOWEST_EXE_TIME: 2025-04-15 14:48:59.343768
SLOWEST_EXE_USEC: 3490
SLOW_COUNT: 0
HIT_COUNT: 2682
PLAN_SIZE: 65528
EXECUTIONS: 2683
DISK_READS: 0
DIRECT_WRITES: 0
BUFFER_GETS: 0
APPLICATION_WAIT_TIME: 0
CONCURRENCY_WAIT_TIME: 0
USER_IO_WAIT_TIME: 0
ROWS_PROCESSED: 2683
ELAPSED_TIME: 294988
CPU_TIME: 96630
LARGE_QUERYS: 0
DELAYED_LARGE_QUERYS: 0
DELAYED_PX_QUERYS: 0
OUTLINE_VERSION: 0
OUTLINE_ID: -1
OUTLINE_DATA: /*+BEGIN_OUTLINE_DATA FULL(@"SEL$1" "oceanbase"."__all_core_table"@"SEL$1") OPTIMIZER_FEATURES_ENABLE('4.3.5.2') END_OUTLINE_DATA*/
ACS_SEL_INFO:
TABLE_SCAN: 0
EVOLUTION: 0
EVO_EXECUTIONS: 0
EVO_CPU_TIME: 0
TIMEOUT_COUNT: 0
PS_STMT_ID: -1
SESSID: 0
TEMP_TABLES:
IS_USE_JIT: 0
OBJECT_TYPE: SQL_PLAN
HINTS_INFO: /*+ */
HINTS_ALL_WORKED: 1
PL_SCHEMA_ID: 0
IS_BATCHED_MULTI_STMT: 0
RULE_NAME:
PLAN_STATUS: ACTIVE
ADAPTIVE_FEEDBACK_TIMES: 0