Oracle-L: RE: Shared Pool Tuneup

From: John Hallas <john.hallas_at_hcresources.co.uk>
Date: Tue, 21 May 2002 13:52:15 -0800
Message-ID: <F001.00466B93.20020521135215@fatcity.com>

Or you can use the method posted by Suzy Vordos on 20/4/02

If on 8i you could use a startup trigger for this. Here's mine:

create or replace trigger sys.pin_db_objects after startup on database
begin

    sys.dbms_shared_pool.keep('SYS.DBMSZEXP_SYSPKGGRNT');
    sys.dbms_shared_pool.keep('SYS.DBMS_ALERT');
    sys.dbms_shared_pool.keep('SYS.DBMS_APPLICATION_INFO');
    sys.dbms_shared_pool.keep('SYS.DBMS_AQADM_SYS');
    sys.dbms_shared_pool.keep('SYS.DBMS_AQ_EXP_QUEUES');
    sys.dbms_shared_pool.keep('SYS.DBMS_AQ_IMPORT_INTERNAL');
    sys.dbms_shared_pool.keep('SYS.DBMS_AQ_SYS_EXP_INTERNAL');
    sys.dbms_shared_pool.keep('SYS.DBMS_ASYNCRPC_PUSH');
    sys.dbms_shared_pool.keep('SYS.DBMS_DDL');
    sys.dbms_shared_pool.keep('SYS.DBMS_DDL_INTERNAL');
    sys.dbms_shared_pool.keep('SYS.DBMS_DEFER');
    sys.dbms_shared_pool.keep('SYS.DBMS_DEFERGEN');
    sys.dbms_shared_pool.keep('SYS.DBMS_DEFERGEN_AUDIT');
    sys.dbms_shared_pool.keep('SYS.DBMS_DEFERGEN_INTERNAL');
    sys.dbms_shared_pool.keep('SYS.DBMS_DEFERGEN_LOB');
    sys.dbms_shared_pool.keep('SYS.DBMS_DEFERGEN_UTIL');
    sys.dbms_shared_pool.keep('SYS.DBMS_DEFER');
    sys.dbms_shared_pool.keep('SYS.DBMS_DEFER_IMPORT_INTERNAL');
    sys.dbms_shared_pool.keep('SYS.DBMS_DEFER_INTERNAL_SYS');
    sys.dbms_shared_pool.keep('SYS.DBMS_DEFER_QUERY_UTL');
    sys.dbms_shared_pool.keep('SYS.DBMS_DEFER_SYS');
    sys.dbms_shared_pool.keep('SYS.DBMS_DEFER_SYS_PART1');
    sys.dbms_shared_pool.keep('SYS.DBMS_DESCRIBE');
    sys.dbms_shared_pool.keep('SYS.DBMS_EXPORT_EXTENSION');
    sys.dbms_shared_pool.keep('SYS.DBMS_IJOB');
    sys.dbms_shared_pool.keep('SYS.DBMS_INTERNAL_TRIGGER');
    sys.dbms_shared_pool.keep('SYS.DBMS_JOB');
    sys.dbms_shared_pool.keep('SYS.DBMS_LOCK');
    sys.dbms_shared_pool.keep('SYS.DBMS_OUTPUT');
    sys.dbms_shared_pool.keep('SYS.DBMS_PRVTRMIE');
    sys.dbms_shared_pool.keep('SYS.DBMS_REFRESH_EXP_LWM');
    sys.dbms_shared_pool.keep('SYS.DBMS_REFRESH_EXP_SITES');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPCAT');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPCAT_ADMIN');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPCAT_CACHE');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPCAT_DECL');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPCAT_FLA_UTL');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPCAT_INTERNAL');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPCAT_MAS');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPCAT_RGT_EXP');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPCAT_UTL');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPCAT_UTL2');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPCAT_UTL3');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPCAT_UTL4');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPCAT_RPC');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPCAT_RPC_UTL');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPUTIL');
    sys.dbms_shared_pool.keep('SYS.DBMS_REPUTIL2');
    sys.dbms_shared_pool.keep('SYS.DBMS_RMGR_GROUP_EXPORT');
    sys.dbms_shared_pool.keep('SYS.DBMS_RMGR_PACT_EXPORT');
    sys.dbms_shared_pool.keep('SYS.DBMS_RMGR_PLAN_EXPORT');
    sys.dbms_shared_pool.keep('SYS.DBMS_SESSION');
    sys.dbms_shared_pool.keep('SYS.DBMS_SNAP_INTERNAL');
    sys.dbms_shared_pool.keep('SYS.DBMS_SQL');
    sys.dbms_shared_pool.keep('SYS.DBMS_STANDARD');
    sys.dbms_shared_pool.keep('SYS.DBMS_SYSTEM');
    sys.dbms_shared_pool.keep('SYS.DBMS_SYS_SQL');
    sys.dbms_shared_pool.keep('SYS.DBMS_UTILITY');
    sys.dbms_shared_pool.keep('SYS.DBMS_ZHELP');
    sys.dbms_shared_pool.keep('SYS.DBMS_ZHELP_IR');
    sys.dbms_shared_pool.keep('SYS.STANDARD');
    sys.dbms_shared_pool.keep('SYS.UTL_RAW');
    sys.dbms_shared_pool.keep('PERFSTAT.STATSPACK');

end;
/

John

-----Original Message-----

Sent: 21 May 2002 21:44
To: Multiple recipients of list ORACLE-L

Hamid,

Madhu is right. But comination of execution and load will be more practical .Run following query and see number of executions...

select substr(c.owner,1,5)"OWNER",substr(c.name,1,25)"name",

       round(c.sharable_mem / 1024) K,
       c.loads,
       c.executions,
       c.kept
from v$db_object_cache c,
     sys.obj$ o,
     sys.user$ u

where kept = 'NO'
and u.name = c.owner
and u.user# = o.owner#
and o.name = c.name
-- and o.type in (7, 8, 9)

order by 4,2 desc
/

Once you decide to pin run following through a sql file at the time of startup script for database...(just an extract for your guidance)

EXECUTE SYS.DBMS_SHARED_POOL.KEEP('SYS.DBMS_APPLICATION_INFO');
EXECUTE SYS.DBMS_SHARED_POOL.KEEP('SYS.DBMS_DESCRIBE');
EXECUTE SYS.DBMS_SHARED_POOL.KEEP('SYS.DBMS_LOCK');
EXECUTE SYS.DBMS_SHARED_POOL.KEEP('SYS.DBMS_OUTPUT');
EXECUTE SYS.DBMS_SHARED_POOL.KEEP('SYS.DBMS_STANDARD');
EXECUTE SYS.DBMS_SHARED_POOL.KEEP('SYS.DBMS_UTILITY');
EXECUTE SYS.DBMS_SHARED_POOL.KEEP('SYS.STANDARD');
execute sys.dbms_shared_pool.keep('APPS.FND_DCP');
execute sys.dbms_shared_pool.keep('APPS.CSTPPWMX');
execute sys.dbms_shared_pool.keep('APPS.CSTPUTIL');
execute sys.dbms_shared_pool.keep('APPS.AP_APPROVAL_PKG');
execute sys.dbms_shared_pool.keep('SYS.PSTUBT');

exit;

HTH,
Regards
Rafiq

Reply-To: ORACLE-L_at_fatcity.com
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> Date: Tue, 21 May 2002 12:26:53 -0800

Hamid,
what happens , if an object is getting executed once in a while but takes huge sharable memory, we may not be getting full use of pinning it in the shared pool, except wasting the memory, So we need to consider the number of executions also. if the number of executions are high for any object/SQL, its good idea to keep it in shared pool.

--Madhu

-----Original Message-----

Sent: Tuesday, May 21, 2002 2:47 PM
To: Multiple recipients of list ORACLE-L

Hi List,
I have run some scripts for Tune up shared pool,here is the result of one script which i run :
Script:
SELECT name,sharable_mem
FROM v$db_object_cache
WHERE sharable_mem > 10000
AND (TYPE = 'PACKAGE' OR TYPE = 'PACKAGE BODY' OR TYPE = 'FUNCTION' OR
TYPE = 'PROCEDURE')
AND KEPT = 'NO'
ORDER BY 2 DESC here is the result:

NAME                            SHARABLE_MEM


-----------------------------           --------------------------

DBMS_JAVA                       56373
DBMS_STANDARD           24405
DBMS_UTILITY                    24212
DBMS_SPACE_ADMIN                20832
DBMS_UTILITY                    20508
DBMS_JAVA                       15189
DBMS_OUTPUT             13063
DBMS_APPLICATION_INFO   12461
DBMS_SHARED_POOL                11148
DBMS_SHARED_POOL                10648

Question is, do i have to pin all of these objects in my shared_pool or NOT? Thanks

Hamid Alavi
Office 818 737-0526
Cell 818 402-1987

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MOHAMMAD RAFIQ

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Author: John Hallas
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