Oracle 12c DBMS_CACHEUTIL Demos

Oracle DBMS_CACHEUTIL Version 12.1.0.2

General Information

Library Note

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The Library is currently in the process of being upgraded from Oracle Database Version 12.1.0.1 to 12.1.0.2. Demos are being upgraded to reflect the new Container paradigm as well as EBR (Edition Based Redefinition) and may contain references to CDBs, PDBs, and other objects you may not be familiar with such as CDB_OBJECTS_AE: Welcome to 12c.

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Purpose

This undocumented package contains miscellaneous cache layer PL/SQL functions

AUTHID

DEFINER

Dependencies

DBMS_ASSERT

DBMS_OUTPUT

SYS_DBA_SEGS

Documented

First Available

11.2.0.1

Security Model

Owned by SYS with EXECUTE granted to the DBA role

Source

{ORACLE_HOME}/rdbms/admin/dbmscu.sql

Subprograms

DISSOLVE_AFFINITY	GRAB_AFFINITY	LIST_READMOSTLY
DISSOLVE_READMOSTLY	GRAB_READMOSTLY	OBJECT_DOWNCONVERT

DISSOLVE_AFFINITY (new 12.1 parameter)

Try to dissolve object affinity in RAC environment

dbms_cacheutil.dissolve_affinity(
schema         IN VARCHAR2,
obj            IN VARCHAR2,
partition      IN VARCHAR2 := NULL,
dissolve_index IN BOOLEAN := TRUE,
active_drm     IN BOOLEAN := FALSE);

exec dbms_cacheutil.dissolve_affinity(USER, 'SERV_INST');

DISSOLVE_READMOSTLY

Try to dissolve object readmostly in RAC environment

dbms_cacheutil.dissolve_readmostly(
schema         IN VARCHAR2,
obj            IN VARCHAR2,
partition      IN VARCHAR2 := NULL,
dissolve_index IN BOOLEAN := TRUE);

exec dbms_cacheutil.dissolve_readmostly(USER, 'SERV_INST');

GRAB_AFFINITY (new 12.1 parameter)

Try to grab object affinity in RAC environment

dbms_cacheutil.grab_affinity(
schema IN VARCHAR2,
obj IN VARCHAR2,
partition IN VARCHAR2 := NULL,
grab_index IN BOOLEAN := TRUE,
active_drm IN BOOLEAN := FALSE);

exec dbms_cacheutil.grab_affinity(USER, 'SERV_INST');

GRAB_READMOSTLY

Try to grab object readmostly in RAC environment

dbms_cacheutil.grab_readmostly(
schema IN VARCHAR2,
obj IN VARCHAR2,
partition IN VARCHAR2 := NULL,
grab_index IN BOOLEAN := TRUE);

exec dbms_cacheutil.grab_readmostly(USER, 'SERV_INST');

LIST_READMOSTLY

List objects that have the readmostly property set

dbms_cacheutil.list_readmostly;

exec dbms_cacheutil.list_readmostly;

OBJECT_DOWNCONVERT

Tries to downconvert object locks to shared mode in RAC

dbms_cacheutil.object_downconvert(
schema            IN VARCHAR2,
obj               IN VARCHAR2,
partition         IN VARCHAR2 := NULL,
downconvert_index IN BOOLEAN := TRUE);

exec dbms_cacheutil.object_downconvert(USER, 'SERV_INST');