1. Database Reference
  2. Dynamic Performance Views
  3. Dynamic Performance (V$) Views: V$IM_COLUMN_LEVEL to V$RULE_SET_AGGREGATE_STATS
  4. V$OPTIMIZER_PROCESSING_RATE

8.104 V$OPTIMIZER_PROCESSING_RATE

V$OPTIMIZER_PROCESSING_RATE displays the processing rates used by the optimizer to compute degree of parallelism.

Note:

You can manipulate these rates using these procedures for the DBMS_STATS package:

  • SET_PROCESSING_RATE

  • DELETE_PROCESSING_RATE

  • GATHER_PROCESSING_RATE

See Oracle Database PL/SQL Packages and Types Reference for more information about the DBMS_STATS package.

Column Datatype Description

ADDRESS

RAW(4| 8)

Address of the handle to the parent for this cursor

OPERATION_NAME

VARCHAR2(64)

Name of the operation. The possible values are AGGR, ALL, CPU, CPU_ACCESS, CPU_AGGR, CPU_BYTES_PER_SEC, CPU_FILTER, CPU_GBY, CPU_HASH_JOIN, CPU_JOIN, CPU_NL_JOIN, CPU_RANDOM_ACCESS, CPU_ROWS_PER_SEC, CPU_SEQUENTIAL_ACCESS, CPU_SM_JOIN, CPU_SORT, HASH, IO, IO_ACCESS, IO_BYTES_PER_SEC, IO_RANDOM_ACCESS, IO_ROWS_PER_SEC, IO_SEQUENTIAL_ACCESS, MEMCMP, MEMCPY

MANUAL_VALUE

VARCHAR2(10)

Value of the operation set manually by the user

CALIBRATION_VALUE

VARCHAR2(10)

Value of the operation obtained from calibration (by running the GATHER_PROCESSING_RATE procedure)

DEFAULT_VALUE

VARCHAR2(10)

Default value of the operation

CON_ID

NUMBER

The ID of the container to which the data pertains. Possible values include:

  • 0: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs.

  • 1: This value is used for rows containing data that pertain to only the root

  • n: Where n is the applicable container ID for the rows containing data