Memory UsageV$DB_OBJECT_CACHEThis view provides object level statistics for objects in the library cache (shared pool). This view provides more details than V$LIBRARYCACHE and is useful for finding activeobjects in the shared pool. Useful Columns for V$DB_OBJECT_CACHEMost of the columns of this table provide current state information.
QuickSql: --generate sql to pin objects in the shared_pool which are not currently pinned. select 'exec DBMS_SHARED_POOL.keep('||chr(39)||owner||'.'||NAME||chr(39)||','||chr(39)||'P'||chr(39)||');' as sql_to_run from V$DB_OBJECT_CACHE where TYPE in ('PACKAGE','FUNCTION','PROCEDURE') and loads > 50 and kept='NO' and executions > 50; SQL_TO_RUN --------------exec dbms_shared_pool.keep('SYS.DBMS_JAVA','P'); exec dbms_shared_pool.keep('SYS.DBMS_OUTPUT','P'); exec dbms_shared_pool.keep('SYS.DBMS_PIPE','P'); exec dbms_shared_pool.keep('SYS.DBMS_REGISTRY','P'); exec dbms_shared_pool.keep('SYS.DBMS_RLS','P'); exec dbms_shared_pool.keep('SYS.OWA_MATCH','P'); exec dbms_shared_pool.keep('SYS.OWA_SEC','P'); exec dbms_shared_pool.keep('SYS.OWA_UTIL','P'); exec dbms_shared_pool.keep('SYS.PLITBLM','P'); exec dbms_shared_pool.keep('SYS.STANDARD','P'); exec dbms_shared_pool.keep('SYS.SYSEVENT','P'); --show distribution of shared pool memory across different types of objects.--show if any of the objects have been pinned using the procedure DBMS_SHARED_POOL.KEEP(). col type for a20 col kept for a4 select type,count(*),kept,round(SUM(sharable_mem)/1024,0) share_mem_kilo from V$DB_OBJECT_CACHE where sharable_mem != 0 GROUP BY type, kept order by 3,4; TYPE COUNT(*) KEPT SHARE_MEM_KILO -------------------- ---------- ---- -------------- APP CONTEXT 1 NO 1 SEQUENCE 2 NO 3 NON-EXISTENT 3 NO 3 PIPE 5 NO 6 PUB_SUB 5 NO 8 TRIGGER 4 NO 14 FUNCTION 4 NO 21 SYNONYM 12 NO 56 VIEW 29 NO 66 TABLE 78 NO 161 PACKAGE BODY 11 NO 166 PACKAGE 12 NO 623 CURSOR 42270 NO 332424 INDEX 4 YES 5 CLUSTER 6 YES 12 TABLE 20 YES 43 --find objects with large number of loads col name for a80 trunc SELECT owner,sharable_mem,kept,loads,name from V$DB_OBJECT_CACHE WHERE loads > 2 ORDER BY loads DESC; OWNER SHARABLE_MEM KEP LOADS NAME -------------------- ------------ --- ---------- ---------------------------------------- SYS 29304 NO 89 DBMS_SESSION GENERAL 2567 NO 84 GJBPRUN BANSECR 22471 NO 78 G$_SECURITY_PKG BANINST1 27690 NO 66 GB_COMMON BANINST1 27005 NO 61 GB_MESSAGING SYS 16496 NO 61 DUAL GENERAL 2127 NO 52 GUBINST BANSECR 22464 NO 48 G$_VPDI_SECURITY--find objects using large amounts of memory. pin using DBMS_SHARED_POOL.KEEP( ). --sharable memory in shared pool consumed by the object col name for a40 col type for a30 select OWNER,NAME,TYPE,SHARABLE_MEM from V$DB_OBJECT_CACHE where SHARABLE_MEM > 10000 and type in ('PACKAGE','PACKAGE BODY','FUNCTION','PROCEDURE') order by SHARABLE_MEM desc; OWNER NAME TYPE SHARABLE_MEM ---------- ---------------------------------------- ------------------------------ ------------ SYS STANDARD PACKAGE 499812 SYS DBMS_JAVA PACKAGE 82685 SYS OWA_UTIL PACKAGE BODY 66732 BANINST1 BWCKFRMT PACKAGE BODY 62009 BANINST1 RB_AWARD_DISBURSEMENT PACKAGE BODY 60606 WTAILOR TWBKBSSF PACKAGE BODY 35152 --determine which objects to pin execute when database is in steady state. set linesize 150 col Oname for a40 col owner for a15 col Type for a20 SELECT owner||'.'||name Oname,substr(type,1,12) "Type", sharable_mem "Size",executions,loads, kept FROM V$DB_OBJECT_CACHE WHERE type in ('TRIGGER','PROCEDURE','PACKAGE BODY','PACKAGE') AND executions > 0 ORDER BY executions desc,loads desc, sharable_mem desc; ONAME Type Size EXECUTIONS LOADS KEP ---------------------------------------- -------------------- ---------- ---------- ---------- --- BANINST1.DML_COMMON PACKAGE BODY 7651 1361387 1 NO SYS.STANDARD PACKAGE BODY 32684 994931 1 NO SYS.PLITBLM PACKAGE 7971 742622 6 NO BANSECR.G$_VPDI_SECURITY PACKAGE BODY 9472 339687 1 NO BANINST1.ROKLOGS PACKAGE BODY 10568 78872 1 NO BANINST1.GB_COMMON PACKAGE BODY 15978 45413 8 NO SYS.DBMS_STANDARD PACKAGE 41969 40198 44 NO BANSECR.G$_SECURITY_PKG PACKAGE BODY 26807 37695 11 NO BANINST1.GB_MESSAGING PACKAGE BODY 14053 24138 8 NO SYS.DBMS_SESSION PACKAGE BODY 10472 14484 8 NO SYS.DBMS_PIPE PACKAGE BODY 8229 11156 1 NO BANINST1.ROKPVAL PACKAGE BODY 95696 10021 1 NO SYS.DBMS_APPLICATION_INFO PACKAGE BODY 4641 9568 10 NO WTAILOR.TWBKBSSF PACKAGE BODY 35152 7820 1 NO SYS.HTP PACKAGE BODY 24679 7108 1 NO BANINST1.RB_AWARD_DISBURSEMENT PACKAGE BODY 60606 6122 1 NO --list large, un-pinned objects. set linesize 150 col sz for a10 col name for a100 col keeped for a6 select to_char(sharable_mem / 1024,'999999') sz_in_K, decode(kept, 'yes','yes ','') keeped,owner||','||name||lpad(' ',29 - (length(owner) + length(name))) || '(' ||type||')'name,null extra, 0 iscur from v$db_object_cache v where sharable_mem > 1024 * 1000; --list large, un-pinned procedures, packages, functions. col type for a25 col name for a40 col owner for a25 select owner,name,type,round(sum(sharable_mem/1024),1) sharable_mem_K from v$db_object_cache where kept = 'NO' and (type = 'PACKAGE' or type = 'FUNCTION' or type = 'PROCEDURE')group by owner,name,type order by 4;OWNER NAME TYPE SHARABLE_MEM_K ------------------------- ---------------------------------------- ------------------------- -------------- SYS DICTIONARY_OBJ_NAME FUNCTION 16.1 SYS DICTIONARY_OBJ_TYPE FUNCTION 16.2 SYS SYSEVENT FUNCTION 16.6 SYS DBMS_APPLICATION_INFO PACKAGE 20.5 SYS DBMS_OUTPUT PACKAGE 21.2 SYS DBMS_STANDARD PACKAGE 36.8 SYS STANDARD PACKAGE 428.2 |
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Thursday, 25 August 2011
SHARED POOL MEMORY USAGE in bytes
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