Shared pool and plsql
how can i pin blocks to plsql in oracle 11g/oracle 10g?
it is through exec dbms_shared_pool.keep()?
Yes.
Similar Messages
-
Explain one query in 256M shared pool and ORA-4031 .
Hi,
looks like Oracle 9.2.0.8 got some problems with explaining huge (1000 lines) queries, here
goes ORA-4031 dump, shared pool is about 256 M but there are no other sessions in that DB only mine .
I can reproduce that in 1GB shared pool as well .
*** 2010-09-06 09:43:24.005
*** SESSION ID:(13.24) 2010-09-06 09:43:23.997
=================================
Begin 4031 Diagnostic Information
=================================
The following information assists Oracle in diagnosing
causes of ORA-4031 errors. This trace may be disabled
by setting the init.ora parameter _4031_dump_bitvec = 0
======================================
Allocation Request Summary Information
======================================
Current information setting: 00654fff
Dump Interval=300 seconds SGA Heap Dump Interval=3600 seconds
Last Dump Time=09/06/2010 09:43:22
Allocation request for: qknAllocate : qkn
Heap: 70000002aa6f4e8, size: 640
HEAP DUMP heap name="sga heap" desc=700000000000058
extent sz=0xfe0 alt=200 het=32767 rec=9 flg=-126 opc=0
parent=0 owner=0 nex=0 xsz=0x0
HEAP DUMP heap name="sql area" desc=70000002aa6f4e8
extent sz=0x1040 alt=32767 het=32 rec=0 flg=2 opc=2
parent=700000000000058 owner=0 nex=0 xsz=0x1
Subheap has 102506016 bytes of memory allocated
====================
Process State Object
====================
SO: 7000000222fe540, type: 2, owner: 0, flag: INIT/-/-/0x00
(process) Oracle pid=12, calls cur/top: 700000021736ba0/700000021736ba0, flag: (0) -
int error: 0, call error: 0, sess error: 0, txn error 0
(post info) last post received: 199 0 4
last post received-location: kslpsr
last process to post me: 7000000222fca88 1 6
last post sent: 0 0 16
last post sent-location: ksasnd
last process posted by me: 7000000222fca88 1 6
(latch info) wait_event=0 bits=0
Process Group: DEFAULT, pseudo proc: 7000000212e7290
O/S info: user: oracle, term: UNKNOWN, ospid: 6766752
OSD pid info: Unix process pid: 6766752, image: oracle@prod3 (TNS V1-V3)
=========================
User Session State Object
=========================
SO: 7000000226ee540, type: 4, owner: 7000000222fe540, flag: INIT/-/-/0x00
(session) trans: 0, creator: 7000000222fe540, flag: (100045) USR/- BSY/-/-/-/-/-
DID: 0001-000C-00000002, short-term DID: 0000-0000-00000000
txn branch: 0
oct: 50, prv: 0, sql: 70000002aa7fbf8, psql: 0, user: 2622/INSTALL
program: sqlplus.exe
application name: SQL*Plus, hash value=3669949024
last wait for 'db file sequential read' blocking sess=0x0 seq=93 wait_time=11432
file#=1, block#=106e8, blocks=1
temporary object counter: 0
=========================
Current Parent KGL Object
=========================
LIBRARY OBJECT HANDLE: handle=70000002aa7fbf8
name=
explain plan for
select *
from salda
where saldo <> 0
and konta in ('361','362','363','371','372','373','380','381','382','383','384','385','386','387','388','389','390','391','392','393',
'394','395','396','397','398','399','400','401','402','403','404','405','406','407','408','409','410','411','412','413',
hash=ff099bfd timestamp=09-06-2010 09:41:45
namespace=CRSR flags=RON/KGHP/TIM/PN0/[10010000]
kkkk-dddd-llll=0000-0001-0001 lock=N pin=X latch#=7
lwt=70000002aa7fc28[70000002aa7fc28,70000002aa7fc28] ltm=70000002aa7fc38[70000002aa7fc38,70000002aa7fc38]
pwt=70000002aa7fc58[70000002aa7fc58,70000002aa7fc58] ptm=70000002aa7fce8[70000002aa7fce8,70000002aa7fce8]
ref=70000002aa7fc08[70000002aa7fc08, 70000002aa7fc08] lnd=70000002aa7fd00[70000002aa7fd00,70000002aa7fd00]
LIBRARY OBJECT: object=70000002aa6fc98
type=CRSR flags=EXS[0001] pflags= [00] status=VALD load=0
CHILDREN: size=16
child# table reference handle
0 70000002aa6ff08 70000002aa6fbc0 70000002aa6f7a0
==================
Current KGL Object
==================
LIBRARY OBJECT HANDLE: handle=70000002aa6f7a0
namespace=CRSR flags=RON/KGHP/PN0/[10010000]
kkkk-dddd-llll=0000-0000-0000 lock=N pin=X latch#=7
lwt=70000002aa6f7d0[70000002aa6f7d0,70000002aa6f7d0] ltm=70000002aa6f7e0[70000002aa6f7e0,70000002aa6f7e0]
pwt=70000002aa6f800[70000002aa6f800,70000002aa6f800] ptm=70000002aa6f890[70000002aa6f890,70000002aa6f890]
ref=70000002aa6f7b0[70000002aa6fbc0, 70000002aa6fbc0] lnd=70000002aa6f8a8[70000002aa6f8a8,70000002aa6f8a8]
LIBRARY OBJECT: object=70000002aa6f3b8
type=CRSR flags=EXS[0001] pflags= [00] status=VALD load=0
===========================
Current Instatiation Object
===========================
INSTANTIATION OBJECT: object=1102fa2e0
type="cursor"[2] lock=70000002865ffe0 handle=70000002aa7fbf8 body=0 level=0
flags=FST[60] executions=0
cursor name:
explain plan for
select *
from salda
where saldo <> 0
and nr_konta in ('361','362','363','371','372','373','380','381','382','383','384','385','386','387','388','389','390','391','392','393',
'394','395','396','397','398','399','400','401','402','403','404','405','406','407','408','409','410','411','412','413',
'414','432','450','453','454','455','456','457','458','459','460','461','462','463','464','465','466','467','468','469',
'470','471','472','473','474','475','476','477','478','479','480','481')
and (
(umowa = lpad('2169725150',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2170639147',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2170815147',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2170991138',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2173034150',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2173821138',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2174491138',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2176065138',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2177180150',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2178183150',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2178609150',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2180241147',10) and nr_klasy = lpad('27',3)) or
(umowa = lpad('2180252147',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2180377148',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2180787148',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2181011148',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2183314150',10) and nr_klasy = lpad('9',3)) or
(umowa = lpad('2187754150',10) and nr_klasy = lpad('9',3)) or
(umowa = lpad('2189036150',10) and nr_klasy = lpad('9',3)) or
(umowa = lpad('2189362150',10) and nr_klasy = lpad('9',3)) or
(umowa = lpad('2189685150',10) and nr_klasy = lpad('27',3)) or
(umowa = lpad('2191061124',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2194768150',10) and nr_klasy = lpad('27',3)) or
(umowa = lpad('2195063150',10) and nr_klasy = lpad('9',3)) or
(umowa = lpad('2195568150',10) and nr_klasy = lpad('9',3)) or
(umowa = lpad('2196774143',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2196872143',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2196964143',10) and nr_klasy = lpad('7',3)) or
.... a lot off similar lines
child pin: 0, child lock: 70000002865fb18, parent lock: 70000002865ffe0
xscflg: 4004, parent handle: 70000002aa7fbf8, xscfl2: 0
----- Call Stack Trace -----
calling call entry argument values in hex
location type point (? means dubious value)
ksm_4031_dump+065c bl ksedst 110006450 ?
ksmasg+0084 bl ksm_4031_dump FFFFFFFFFFF5F60 ? 10299AAF8 ?
000000000 ? 70000002A9007F8 ?
000000000 ? 000000000 ?
kghnospc+0178 bl _ptrgl
kghalp+00f0 bl kghnospc FFFFFFFFFFF6150 ?
422222247FFFFFFC ?
100107620 ? 080000000 ?
000000000 ?
kksalc+0048 bl kghalp 100107620 ? 000000000 ?
FFFFFFFFFFF62C0 ? 000000000 ?
000000080 ? 000000003 ?
qknAllocate+0040 bl kksalc 70000002AC2E1C0 ?
70000002C873DD8 ?
70000002AC2E1C0 ?
qknltAllocate+00d0 bl qknAllocate FFFFFFFFFFF65C0 ?
7000000345292A0 ? 000000000 ?
000000003 ?
qkatab+0ec8 bl qknltAllocate 000000000 ? 000000000 ?
000000000 ? 000000000 ?
000000000 ? 000000000 ?
000000000 ? 000000000 ?
70000002C874170 ?
qkajoi+0b30 bl qkatab 000000000 ? 110378F00 ?
000000000 ? 000000042 ?
100002100050000 ? 110378530 ?
qkaqkn+08d0 bl qkajoi 000000000 ? 000000000 ?
000000000 ? 000000000 ?
000000000 ? 000000000 ?
000000000 ? 000000000 ?
qkadrv+07a0 bl qkaqkn 000000000 ? 10299B690 ?
===============================
Memory Utilization of Subpool 1
===============================
Allocation Name Size
"free memory " 148632616
"miscellaneous " 3998104
"qmps connections " 1454200
"errors " 0
"txncallback " 246640
"PL/SQL MPCODE " 506520
"enqueue " 6054632
"KSXR pending messages que" 853952
"KQR L PO " 221192
"parameters " 1064
"Checkpoint queue " 1026560
"1M buffer " 528384
"db_block_hash_buckets " 589824
"fixed allocation callback" 1112
"sim trace entries " 196608
"KGLS heap " 374728
"KGK heap " 552
"channel handle " 780672
"MTTR advisory " 34088
"DML lock " 1022032
"trigger source " 2288
"trigger defini " 280
"dictionary cache " 2137216
"table definiti " 456
"KQR X PO " 28352
"transaction " 2747760
"constraints " 824960
"library cache " 2030512
"message pool freequeue " 213264
"sql area " 1546168
"sessions " 4467008
"replication session stats" 1004720
"event statistics per sess" 18791304
"KQR S SO " 5632
"sim memory hea " 157768
"PL/SQL DIANA " 80104
"KQR M PO " 141320
"messages " 624000
===============================
Memory Utilization of Subpool 2
===============================
Allocation Name Size
"free memory " 6285488
"miscellaneous " 8927008
"log_buffer " 1056800
"FileOpenBlock " 16270720
"sim memory hea " 162008
"KQR S SO " 9472
"transaction " 3297312
"PL/SQL DIANA " 0
"KGLS heap " 47776
"table definiti " 0
"db_handles " 3480000
"KQR L PO " 213056
"Temporary Tables State Ob" 775488
"trigger inform " 0
"message pool freequeue " 558720
"trigger defini " 0
"fixed allocation callback" 1168
"branch " 1180120
"ktlbk state objects " 1948360
"PLS non-lib hp " 2088
"KGK heap " 6448
"KQR M SO " 1024
"dictionary cache " 2137216
"parameters " 0
"Checkpoint queue " 1026560
"trigger source " 0
"enqueue resources " 768192
"library cache " 1798152
"KSXR receive buffers " 1034000
"sql area " 105380864
"processes " 4104000
"sessions " 4469712
"joxs heap init " 4240
"errors " 0
"event statistics per sess" 18779936
"PL/SQL MPCODE " 0
"KQR M PO " 173592
"UNDO INFO SEGMENTED ARRAY" 649856
LIBRARY CACHE STATISTICS:
namespace gets hit ratio pins hit ratio reloads invalids
CRSR 3184 0.874 12550 0.950 97 11
TABL/PRCD/TYPE 1917 0.871 2293 0.811 0 0
BODY/TYBD 52 0.788 52 0.788 0 0
TRGR 33 0.939 33 0.939 0 0
INDX 74 0.514 43 0.140 0 0
CLST 353 0.977 489 0.980 0 0
OBJE 0 0.000 0 0.000 0 0
PIPE 0 0.000 0 0.000 0 0
LOB 0 0.000 0 0.000 0 0
DIR 0 0.000 0 0.000 0 0
QUEU 0 0.000 0 0.000 0 0
OBJG 0 0.000 0 0.000 0 0
PROP 0 0.000 0 0.000 0 0
JVSC 0 0.000 0 0.000 0 0
JVRE 0 0.000 0 0.000 0 0
ROBJ 0 0.000 0 0.000 0 0
REIP 0 0.000 0 0.000 0 0
CPOB 0 0.000 0 0.000 0 0
EVNT 8 0.750 91 0.978 0 0
SUMM 0 0.000 0 0.000 0 0
DIMN 0 0.000 0 0.000 0 0
CTX 0 0.000 0 0.000 0 0
OUTL 0 0.000 0 0.000 0 0
RULS 0 0.000 0 0.000 0 0
RMGR 0 0.000 0 0.000 0 0
IFSD 0 0.000 0 0.000 0 0
PPLN 0 0.000 0 0.000 0 0
PCLS 0 0.000 0 0.000 0 0
SUBS 0 0.000 0 0.000 0 0
LOCS 0 0.000 0 0.000 0 0
RMOB 0 0.000 0 0.000 0 0
RSMD 0 0.000 0 0.000 0 0
JVSD 0 0.000 0 0.000 0 0
ENPR 0 0.000 0 0.000 0 0
RELC 0 0.000 0 0.000 0 0
STREAM 0 0.000 0 0.000 0 0
APPLY 0 0.000 0 0.000 0 0
APPLY SOURCE 0 0.000 0 0.000 0 0
APPLY DESTN 0 0.000 0 0.000 0 0
TEST 0 0.000 0 0.000 0 0
CUMULATIVE 5621 0.874 15551 0.928 97 11
Permanent space allocted for Load Locks
LATCH:0 TOTAL SPACE: 4248
FREELIST CHUNK COUNT:59 OBJECT SIZE:72
Permanent space allocted for KGL pins
LATCH:0 TOTAL SPACE: 4224
FREELIST CHUNK COUNT:13 OBJECT SIZE:128
LATCH:1 TOTAL SPACE: 4224
FREELIST CHUNK COUNT:15 OBJECT SIZE:128
LATCH:2 TOTAL SPACE: 4224
FREELIST CHUNK COUNT:18 OBJECT SIZE:128
LATCH:3 TOTAL SPACE: 4224
FREELIST CHUNK COUNT:19 OBJECT SIZE:128
LATCH:4 TOTAL SPACE: 4224
FREELIST CHUNK COUNT:21 OBJECT SIZE:128
LATCH:5 TOTAL SPACE: 4224
FREELIST CHUNK COUNT:27 OBJECT SIZE:128
LATCH:6 TOTAL SPACE: 4224
FREELIST CHUNK COUNT:16 OBJECT SIZE:128
Permanent space allocted for KGL locks
LATCH:0 TOTAL SPACE: 4216
FREELIST CHUNK COUNT:11 OBJECT SIZE:136
LATCH:1 TOTAL SPACE: 4216
FREELIST CHUNK COUNT:13 OBJECT SIZE:136
LATCH:2 TOTAL SPACE: 4216
FREELIST CHUNK COUNT:16 OBJECT SIZE:136
...<snipped>...any ideas ?GregG wrote:
Thanks,
but I'm interested in what is the particular problem. Looks like sql area is short on free chunks .I can't say if it is an oracle bug so feel free to ignore my post.
select *
from salda
where saldo 0
and nr_konta in ('361','362','363','371','372','373','380','381','382','383','384','385','386','387','388','389','390','391','392','393',
'394','395','396','397','398','399','400','401','402','403','404','405','406','407','408','409','410','411','412','413',
'414','432','450','453','454','455','456','457','458','459','460','461','462','463','464','465','466','467','468','469',
'470','471','472','473','474','475','476','477','478','479','480','481')
and (
(umowa = lpad('2169725150',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2170639147',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2170815147',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2170991138',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2173034150',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2173821138',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2174491138',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2176065138',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2177180150',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2178183150',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2178609150',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2180241147',10) and nr_klasy = lpad('27',3)) or
(umowa = lpad('2180252147',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2180377148',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2180787148',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2181011148',10) and nr_klasy = lpad('13',3)) or
(umowa = lpad('2183314150',10) and nr_klasy = lpad('9',3)) or
(umowa = lpad('2187754150',10) and nr_klasy = lpad('9',3)) or
(umowa = lpad('2189036150',10) and nr_klasy = lpad('9',3)) or
(umowa = lpad('2189362150',10) and nr_klasy = lpad('9',3)) or
(umowa = lpad('2189685150',10) and nr_klasy = lpad('27',3)) or
(umowa = lpad('2191061124',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2194768150',10) and nr_klasy = lpad('27',3)) or
(umowa = lpad('2195063150',10) and nr_klasy = lpad('9',3)) or
(umowa = lpad('2195568150',10) and nr_klasy = lpad('9',3)) or
(umowa = lpad('2196774143',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2196872143',10) and nr_klasy = lpad('7',3)) or
(umowa = lpad('2196964143',10) and nr_klasy = lpad('7',3)) or
.... a lot off similar linesThis looks like an ideal candidate for using a Global Temporary table (if you can).
So if you can insert all combination of valid values for "umowa" and "nr_klasy" columns in a GTT,
you can simplify your query as
select *
from salda
where saldo 0
and nr_konta in ('361','362','363','371','372','373','380','381','382','383','384','385','386','387','388','389','390','391','392','393',
'394','395','396','397','398','399','400','401','402','403','404','405','406','407','408','409','410','411','412','413',
'414','432','450','453','454','455','456','457','458','459','460','461','462','463','464','465','466','467','468','469',
'470','471','472','473','474','475','476','477','478','479','480','481')
and (umowa, nr_klasy) in (select lpad(col1,10), lpad(col2,3) from gtt_temp) -
hi friends i have a procedure
and its have *(AD IS NULL OR NVAD LIKE AD||'%') AND (SOYAD IS NULL OR NVSOYAD LIKE SOYAD||'%')*
if i use this query and pass different things for AD ; is it become a brand new query for oracle because of ||'%' or its parse and put in shared pool and for a sometime this query don't parse and take from shared pool
PROCEDURE P_YENI_TALEP_LISTELE(RC_CURSOR OUT SYS_REFCURSOR,TOPLAM_TALEP OUT NUMBER,SAYFA_INDEX IN NUMBER,SAYFA_BUYUKLUK IN NUMBER,TC_NO IN NVARCHAR2,AD IN NVARCHAR2,SOYAD IN NVARCHAR2,ONAY IN NUMBER,H_TIP_ID IN NUMBER)
AS
BEGIN
OPEN RC_CURSOR FOR SELECT TA.NT_ID,TA.NTC_NO,HI.NVHIZMET_TUR AS NVARM_KONU,TA.NVOPRTR_CVP,TA.NVGRSM_SURE,TA.NVGRSM_DRM,
TA.NHIZMET,TA.BONAY,TA.DTLP_TRH,TH.NVAD,TH.NVSOYAD,TH.NVILCE ,TA.DALINAN_TRH,
TA.DBRKLAN_TRH,TA.NG_ID,GU.NVAD1||' - '||GU.NVAD2 AS GUZERGAH,HI.NH_TIP_ID,HT.NVHIZMET_TIP,
FROM H_TALEP TA,TNM_HASTA_BILGI TH,TNM_HIZMET HI,SBT_HIZMET_TIP HT,TNM_GUZERGAH GU
WHERE TA.NTC_NO=TH.NTC_NO AND TA.NH_ID=HI.NH_ID AND HI.NH_TIP_ID=HT.NH_TIP_ID AND(TC_NO IS NULL OR TA.NTC_NO=TO_NUMBER(TC_NO)) AND TA.NG_ID=GU.NG_ID AND
*(AD IS NULL OR NVAD LIKE AD||'%') AND (SOYAD IS NULL OR NVSOYAD LIKE SOYAD||'%')*...............The code you have posted has no DYNAMIC SQL in it.... Static SQL inside PL/SQL will bind all the variables for you.
So what you are saying does not compute.
What is making you think a 'brand new query' is being parsed for each execution?
Edited by: Tubby on Nov 8, 2008 4:19 PM -
Hi, all.
"shared pool free memory" from v$sgastat include "SHARED_POOL_RESERVED_SIZE" ??
For example,
select * from v$sgastat
where pool ='shared pool'
and name like 'free memory'
assuming that the result of the above query is about 100Megabytes
and "SHARED_POOL_RESERVED_SIZE" is 50Megabytes,
"100 M free memory" in shared pool includes 50M (reserved area)??
Thanks and Regards.
Message was edited by:
user507290Shortly after the database starts up, some of the 'shared_pool_reserved_size' will probably be in use, although quite a lot of it may still be free; so you cannot say (directly) how much of the "free memory" belongs in the reserved area and how much comes from the rest of the shared pool.
However, there is a view called v$shared_pool_reserved that tells you how much of the reserved area is currently free (and gives various other statisics about the pool's use). There are some versions of Oracle where the definition of this view is wrong, though - possibly in the lower 9i versions.
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
http://www.jlcomp.demon.co.uk -
Shared Pool: KGH No ACCESS Is Very High
if you run the following query it shows you a very high value for KGH NO ACCESS (around 5GB)
select * from v$sgastat where pool = 'shared pool' and (name in ('free memory', 'sql area', 'library cache', 'miscellaneous', 'row cache', 'KGH: NO ACCESS') )
that KGH means?Hi,
As you have sga_target, ASMM is enabled and could be the cause of high KGH No Access. Have a look at
Common Cause for ORA-4031 in 10gR2, Excess "KGH: NO ACCESS" Memory Allocation [Video] (Doc ID 801787.1)
Anand -
Delete a parse statement from shared pool
Can anybody help me to delete a parse statement from shared pool without affecting other objects ( without using ALTER SYSTEM FLUSH SHARED POOL;). This i am trying in my personal training db and I am using 10g. Thanks in advance for all of your replies.
Thank you for all your replies.
I am a newbie to oracle. Just i am playing with usage of bind variables and parameter CURSOR_SHARING .Need to verify when the data is heavly skewed ,sql parsing will occur for the sql statement having bind variables with parameter CURSOR_SHARING=EXACT but not with CURSOR_SHARING=FORCE / SIMILAR .
But infact i didn't see any sql parsing with parameter value EXACT . thinking of deleting my old parse statement from shared pool and try it again.
thanks again -
100% CPU, wait event : latch shared pool
I have a store procedure, run in one of database, it hangs in a "create table ... as select ..." statement.
the wait event is : latch shared pool, and CPU is up to 100%, it has run over few hours and seems hang.
Same stored procedure run on others enviroment, never seen such problem, even run on the same data size or even much much bigger data size.
This procedure has been used more than 2 years, never see such problem in any others enviroment. it only happend in this new setup enviroment.
however, in this enviroment, if I try to reduce data to be very very small, I was able to see procudure complate in 10 sec.
I suspect parameter, for example, I changed shared_pool_size from 40MB to 150 MB, re-start database and re-run, still see the same problem here.
Could anybody suggest any thing I can look into?
Thanksjjzz wrote:
I have a store procedure, run in one of database, it hangs in a "create table ... as select ..." statement.
the wait event is : latch shared pool, and CPU is up to 100%, it has run over few hours and seems hang.
If it's running at 100% CPU, it's not waiting.
Does v$session_wait (or even v$session since you seem to be running 10g) tell you that the session is *"waiting"*, or is it simply noting that your last wait was on the shared pool latch ?
If the latter, then you probably have some SQL in the procedure that has changed its execution plan to become much more CPU intensive - perhaps because of a small change in the data volume, data distribution, or statistics.
First step - find out what SQL statements are executing, and see how much work they are doing. You could query v$session for that session a few times and check what the sql_id and sql_child number are, also prev_sql_id and prev_child_number. If these stay constant, one or other may give you the guilty SQL statement. If not check v$open_cursor for the session.
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
http://www.jlcomp.demon.co.uk
"Science is more than a body of knowledge; it is a way of thinking"
Carl Sagan -
Find below a modified version of a script retrieved from Metalink 146599.1 to check for shared pool fragmentation
I am not sure if it is possible, but is there any way to incorporate into this script a query that will show the effectiveness of using an ALTER SYSTEM FLUSH SHARED_POOL command .
select bucket, freespace,
ROUND(ratio_to_report(freespace) over () * 100, 5) AS "Percentage"
from
(select '0 (<140)' BUCKET, sum(KSMCHSIZ) freespace
from x$ksmsp
where KSMCHSIZ<140
and KSMCHCLS='free'
UNION ALL
select '1 (140-267)' BUCKET, sum(KSMCHSIZ) freespace
from x$ksmsp
where KSMCHSIZ between 140 and 267
and KSMCHCLS='free'
UNION ALL
select '2 (268-523)' BUCKET, sum(KSMCHSIZ) freespace
from x$ksmsp
where KSMCHSIZ between 268 and 523
and KSMCHCLS='free'
UNION ALL
select '3-5 (524-4107)' BUCKET, sum(KSMCHSIZ) freespace
from x$ksmsp
where KSMCHSIZ between 524 and 4107
and KSMCHCLS='free'
UNION ALL
select '6+ (4108+)' BUCKET, sum(KSMCHSIZ) freespace
from x$ksmsp
where KSMCHSIZ >= 4108
and KSMCHCLS='free');Running this SQL, flushing the shared pool, and the re-running should show what the difference before and after is - or does this not suffice?
Flushing the shared pool is also not really addressing the root cause - which most often is non-sharable SQL.
Thus I'm not exactly sure what you're trying to achieve here. The SQL identifies the symptoms - flushing the shared pool treats those symptoms. For a while.
Surely you should rather be looking at the shared pool itself to determine what the problem is and try and fix that instead? A db logon trigger for a poorly written app can for example force cursor sharing for all sessions created by that app. -
Packaged procedures in shared pool?
I have a question. Maybe someone can help me.
When I call a standalone stored procedure, this is loaded in the shared pool and it is available for other users too. That's right, I think.
But what about a packaged procedure? When I call one of the elements declared in the package spec the whole package is loaded in memory. It seems to me that is only for my session. Or is a package, including it's subprograms and global declared variables, also loaded in the shared pool and available for other users, after it is called by a user?> It seems to me that is only for my session.
What test is that based on?
> Or is a package, including its subprograms and global declared variables, also loaded in the shared pool and available for other users, after it is called by a user?
Yes. -
Hi,
Because I use RMAN I decided to configure Large Pool. It is said, that RMAN should use this area if it's defined. But im my system statistics for LargePool are constant - there is always only empty space, no blocks are allocated by RMAN. Could someone tell me what's wrong? Why my RMAN still uses shared pool and no large?
Regards,
Kubathat was an interesting question, after checking in metalink this seems to be myth that if you configure large_pool rman will use it. (the problem with oracle documentation is it conveniently forgets to qualify the conditions).
"The LARGE_POOL is only used if I/O Slaves are specified by one or both of the initialization parameters DBWR_IO_SLAVES or BACKUP_TAPE_IO_SLAVES."
so in your case may be you have not using these parameters, that maybe the reason why RMAN is not using Large_pool.
check metalink note : 134214.1 for more RMAN myths.
which leaves us wondering...why can't these information be made available in the public documentation in the form of short notes or caveats??? -
Hello Team:
I ran a metalink script to report the shared pool utilization recently. I took this output when the database was on peak load.
SQL> /
Obj mem: 66435759 bytes (63.36MB)
Shared sql: 324219036 bytes (309.2MB)
Cursors: 341207073 bytes (325.4MB)
Free memory: 67228508 bytes (64.11MB)
Shared pool utilization (total): 468785754 bytes (447.07MB)
Shared pool allocation (actual): 754974720bytes (720MB)
Percentage Utilized: 91%
does this mean I have to add more space to shared pool. If so what is the threshold value?
Regards,
BalaBhawani nandan Prasad - Principal DBA -- See a to z diagnostics about Shared pool
1. Memory 2
a. Shared Pool 2
1. Introduction 2
2. Architecture 2
3. Scripts for different DBA tasks: 5
a.Measure object usage inside the shared pool and Tune shared pool 7
b.Check reload problem in library cache 12
c.Find the large queries in the shared pool library cache (using > 4mb each) 13
d.Find objects that can be considered pining into the shared pool 13
e.LRU work and objects were loaded and flushed 13
f.How much are waiting for Library Cache Latch 14
g.Queries identical but aren’t shared. 14
h.Get Biggest chunk of free memory. 14
i.Check the shared pool reserved size status 16
j.When having multiple subheaps: 16
k.Check shared pool at first glance quick diagnostics 17
l.Memory Usage - object list level view 17
m.Loads Number of times object has been loaded 17
n.Check number of times and object has been executed 18
o.Check shared pool in more details 18
p.Library Cache Statistics 18
q.Reserve Pool Settings 19
r.Pinned Objects 19
s.Finding literal SQL 19
t.Finding the Library Cache hit ratio 19
u. Row Cache Misses – Dictionary cache stats 19
v. Checking hash chain lengths 20
w. Checking for high version counts 20
x. Finding statement/s which use lots of shared pool memory 20
y. Allocations causing shared pool memory to be 'aged' out 21
z. Issues in various Oracle Releases 21
4. Terminology 22
5. Oracle 11g Caching and Pooling – SQL Result Cache 27
6. References 37
2. SQL 38
3. Statistics 38
4. Wait events 38
5. Schema 39
6. General 39
a. Scripts 39
1. accept.sql 39
1. Memory
a. Shared Pool
1. Introduction
Shared pool is used to cache different types of data such as textual and executable forms of PL/SQL blocks and SQL statements, dictionary cache data, and other data in SGA. Additional shared memory needed in the SHARED POOL if using ASM storage. Gathering schema/database stats (table/index stats) makes database query performance better and it reduce utilization of shared pool. Hence, practice to schedule job to gather stats regularly which suites your database performance. If you use shared pool effectively you can reduce resource consumption in at least four ways
1. Parse overhead is avoided if the SQL statement is already in the shared pool. This saves CPU resources on the host and elapsed time for the end user.
2. Latching resource usage is significantly reduced, which results in greater scalability.
3. Shared pool memory requirements are reduced, because all applications use the same pool of SQL statements and dictionary resources.
4. I/O resources are saved, because dictionary elements that are in the shared pool do not require disk access.
This sharable area of memory is managed as a sophisticated cache and heap manager rolled into one. It has 3 fundamental problems to overcome:
1. The unit of memory allocation is not a constant - memory allocations from the pool can be anything from a few bytes to many kilobytes
2. Not all memory can be 'freed' when a user finishes with it (as is the case in a traditional heap manager) as the aim of the shared pool is to maximize share of information. The information in the memory may be useful to another session - Oracle cannot know in advance if the items will be of any use to anyone else or not.
3. There is no disk area to page out to so this is not like a traditional cache where there is a file backing store. Only "rewriteable" information can be discarded from the cache and it has to be re-created when it is next needed.
Oracle 10g architecture of Shared pool:
Library Cache Shared SQL Area (Hash Value, SQL source, Execution plan)
Data Dictionary Cache
Enqueues Fixed Area Other
Latches
Oracle 11g architecture of Shared pool:
Library Cache Shared SQL Area (Hash Value, SQL source, Execution plan)
Data Dictionary Cache
Result Cache
Enqueues Fixed Area Other
Latches
1. Library Cache
Shared Sql Area: contains Parsed SQL and execution Plans for statements already run against the database. This area allows SQL execution plans to be reused by many users.
Private SQL Area: Private SQL areas are non-shared memory areas assigned to unique user sessions.
Pl/sql Area: contains the recently executed Procedures, Functions and Packages.
Control Structures: Common control structure information example Memory for Latches and locks, sequence cache.
2. Dictionary cache known as the row cache.
Dictionary cache stores all the metadata info of tables and views in the database, Names and data types of the columns in the database, Object and system privileges of all the Users. Oracle maintains the stats of all the objects in the shared pool, if any of the memory objects are not used from the last 3 seconds, these memory objects will be aged out and will be removed from the cache. All the Shared Pool Structures are maintained by a LRU (least recently Used) algorithm, by which Oracle removes the objects from the shared Pool, until there is enough free space in the shared Pool to keep new Object.
3. Scripts for different DBA tasks:
Dictionary Views for shared POOL:
NON-RAC
V$DB_CACHE_ADVICE
V$DB_OBJECT_CACHE
V$DLM_LATCH
V$DLM_LOCKS
V$LATCH
V$LATCHHOLDER
V$LATCHNAME
V$LATCH_CHILDREN
V$LATCH_MISSES
V$LATCH_PARENT
V$LIBRARYCACHE
V$LOCK
V$LOCKED_OBJECT
V$LOCKS_WITH_COLLISIONS
V$LOCK_ACTIVITY
V$LOCK_ELEMENT
V$OPEN_CURSOR
V$PROCESS
V$PX_PROCESS
V$PX_PROCESS_SYSSTAT
V$PX_SESSION
V$PX_SESSTAT
V$ROWCACHE
V$ROWCACHE_PARENT
V$ROWCACHE_SUBORDINATE
V$SESSION
V$SESSION_CONNECT_INFO
V$SESSION_CURSOR_CACHE
V$SESSION_EVENT
V$SESSION_LONGOPS
V$SESSION_OBJECT_CACHE
V$SESSION_WAIT
V$SESSTAT
V$SESS_IO
V$SGA
V$SGASTAT
V$SGAINFO
V$SGA_DYAMIC_COMPONENTS
V$SGA_DYNAMIC_FREE_MEMORY
V$SGA_RESIZE_OPS
V$SGA_CURRENT_RESIZE_OPS
v$shared_pool_advice
V_$SHARED_POOL_ADVICE
V$SHARED_POOL_RESERVED
V$SHARED_SERVER
V$SORT_SEGMENT
V$SORT_USAGE
V$SQL
V$SQLAREA
V$SQLTEXT
V$SQLTEXT_WITH_NEWLINES
V$SQL_BIND_DATA
V$SQL_BIND_METADATA
V$SQL_CURSOR
V$SQL_SHARED_CURSOR
V$SQL_SHARED_MEMORY
V$STATNAME
V$SUBCACHE
V$SYSSTAT
V$SYSTEM_CURSOR_CACHE
V$SYSTEM_EVENT
V$SYSTEM_PARAMETER
X$KSMSP
RAC
GV$LATCH
GV$LATCHHOLDER
GV$LATCHNAME
GV$LATCH_CHILDREN
GV$LATCH_MISSES
GV$LATCH_PARENT
GV$LIBRARYCACHE
GV$LOCK
GV$LOCKED_OBJECT
GV$LOCKS_WITH_COLLISIONS
GV$LOCK_ACTIVITY
GV$LOCK_ELEMENT
GV$PROCESS
GV$PX_PROCESS
GV$PX_PROCESS_SYSSTAT
GV$PX_SESSION
GV$PX_SESSTAT
GV$ROWCACHE
GV$ROWCACHE_PARENT
GV$ROWCACHE_SUBORDINATE
GV$SESSION
GV$SESSION_CONNECT_INFO
GV$SESSION_CURSOR_CACHE
GV$SESSION_EVENT
GV$SESSION_LONGOPS
GV$SESSION_OBJECT_CACHE
GV$SESSION_WAIT
GV$SESSTAT
GV$SESS_IO
GV$SGA
GV$SGASTAT
gv$shared_pool_advice
GV$SHARED_POOL_RESERVED
GV$SHARED_SERVER
GV$SORT_SEGMENT
GV$SORT_USAGE
GV$SQL
GV$SQLAREA
GV$SQLTEXT
GV$SQLTEXT_WITH_NEWLINES
GV$SQL_BIND_DATA
GV$SQL_BIND_METADATA
GV$SQL_CURSOR
GV$SQL_SHARED_CURSOR
GV$SQL_SHARED_MEMORY
GV$STATNAME
GV$SUBCACHE
GV$SYSSTAT
GV$SYSTEM_CURSOR_CACHE
GV$SYSTEM_EVENT
GV$SYSTEM_PARAMETER
GV$WAITSTAT
GV$_LOCK
a.Measure object usage inside the shared pool and Tune shared pool
set pagesize 132
column owner format a16
column name format a36
column sharable_mem format 999,999,999
column executions format 999,999,999
prompt
prompt Memory Usage of Shared Pool Order - Biggest First
prompt
column name format 45
select owner, name||' - '||type name, sharable_mem from v$db_object_cache
where sharable_mem > 10000
and type in ('PACKAGE', 'PACKAGE BODY', 'FUNCTION', 'PROCEDURE')
order by sharable_mem desc
prompt
prompt Loads into Shared Pool - Most Loads First
prompt
select owner, name||' - '||type name, loads , sharable_mem from v$db_object_cache
where loads > 3
and type in ('PACKAGE', 'PACKAGE BODY', 'FUNCTION', 'PROCEDURE')
order by loads desc
prompt
prompt Executions of Objects in the Shared Pool - Most Executions First
prompt
select owner, name||' - '||type name, executions from v$db_object_cache
where executions > 100
and type in ('PACKAGE', 'PACKAGE BODY', 'FUNCTION', 'PROCEDURE')
order by executions desc
select 'If the values for the EXEC and LOADS close increase SHARED_POOL_SIZE!' from dual ;
set feedback off
set linesize 80
set pagesize 52
clear columns
clear breaks
col executions HEADING EXEC
col sharable_mem heading SHAMEM
col owner format a8
col name format a30
col type format a12
set numwidth 8
ttitle center 'Data Base Objects Owned by All Users Statistics' skip 2
select name, type, sharable_mem, loads, executions, pins
from sys.v_$db_object_cache ;
b.Check reload problem in library cache
select namespace, pins, reloads from v$librarycache;
show parameters shared_pool
select bytes/1024/1024 from v$sgastat where pool='shared pool' and name='free memory';
c.Find the large queries in the shared pool library cache (using > 4mb each)
SELECT sql_text "Stmt", count(*), sum(sharable_mem) "Mem",
sum(users_opening) "Open", sum(executions) "Exec"
FROM v$sql GROUP BY sql_text HAVING sum(sharable_mem) > 4096000;
d.Find objects that can be considered pining into the shared pool
column name format a40
column owner format a15
select owner, name, executions, locks, pins, loads, kept from v$db_object_cache where loads > 10;
create temp table and insert records of candidates to be pinned.
CREATE TABLE LRU_TMP AS SELECT * FROM X$KSMLRU;
INSERT INTO LRU_TMP SELECT * FROM X$KSMLRU;
Use the LRU_TMP table for analysis.
SELECT USERNAME, KSMLRCOM, KSMLRHON, KSMLRNUM, KSMLRSIZ, SQL_TEXT
FROM V$SQLAREA A, LRU_TMP K, V$SESSION S WHERE KSMLRSIZ > 3000
AND A.ADDRESS=S.SQL_ADDRESS AND A.HASH_VALUE = S.SQL_HASH_VALUE
AND SADDR=KSMLRSES;
You can see the candidates to pin from the query below
COL STORED_OBJECT FORMAT A40;
COL SQ_EXECUTIONS FORMAT 999,999;
SELECT /*+ ORDERED USE_HASH(D) USE_HASH(C) */ O.KGLNAOWN||’.'||O.KGLNAOBJ STORED_OBJECT, SUM(C.KGLHDEXC) SQL_EXECUTIONS
FROM SYS.X$KGLOB O, SYS.X$KGLRD D, SYS.X$KGLCURSOR C
WHERE
O.INST_ID = USERENV(’INSTANCE’) AND
D.INST_ID = USERENV(’INSTANCE’) AND
C.INST_ID = USERENV(’INSTANCE’) AND
O.KGLOBTYP IN (7, 8, 9, 11, 12) AND
D.KGLHDCDR = O.KGLHDADR AND
C.KGLHDPAR = D.KGLRDHDL
GROUP BY O.KGLNAOWN, O.KGLNAOBJ
HAVING SUM(C.KGLHDEXC) > 0
ORDER BY 2 DESC;
How to pin object
EXECUTE SYS.DBMS_SHARED_POOL.SIZES(150);
EXECUTE SYS.DBMS_SHARED_POOL.KEEP('SYS.STANDARD');
EXECUTE SYS.DBMS_SHARED_POOL.UNKEEP('SYS.STANDARD');
e.LRU work and objects were loaded and flushed
LRU work in the shared pool KSMLRNUM stores the number of objects that were flushed to load the large object. KSMLRISZ stores the size of the object that was loaded (contiguous memory allocated)
column ksmlrcom format a20
column username format a5
select username,sid,KSMLRCOM,KSMLRSIZ,KSMLRNUM, KSMLRHON, KSMLROHV, KSMLRSES from x$ksmlru , v$session where KSMLRSES=SADDR and KSMLRNUM >2 ;
f.How much are waiting for Library Cache Latch
select count(*),event from v$session_wait where event not like '%SQL%' and event not like '%ipc%' and event not like '%timer%' GROUP BY EVENT;
select count(*),wait_time from v$session_wait where event='latch free' and p2=106 group by wait_time;
select sid,wait_time,seconds_in_wait from v$session_wait where event='latch free' and p2=106 and WAIT_TIME>1;
g.Queries identical but aren’t shared.
SELECT address, hash_value, version_count , users_opening , users_executing,
substr(sql_text,1,240) "SQL" FROM v$sqlarea WHERE version_count > 10;
h.Get Biggest chunk of free memory.
select sysdate, decode( sign(ksmchsiz - 812), -1, (ksmchsiz - 16) / 4,
decode(sign(ksmchsiz - 4012),-1, trunc((ksmchsiz + 11924) / 64),
decode(sign(ksmchsiz - 65548), -1, trunc(1/log(ksmchsiz - 11, 2)) + 238,254))) bucket,
sum(ksmchsiz) free_space, count(*) free_chunks, trunc(avg(ksmchsiz)) average_size,
max(ksmchsiz) biggest from x$ksmsp
where inst_id = userenv('Instance') and ksmchcls = 'free' group by
decode(sign(ksmchsiz - 812),-1, (ksmchsiz - 16) / 4,
decode(sign(ksmchsiz - 4012),-1, trunc((ksmchsiz + 11924) / 64),
decode(sign(ksmchsiz - 65548),-1, trunc(1/log(ksmchsiz - 11, 2)) + 238,254 ))) ;
SELECT KSMCHCLS CLASS, COUNT(KSMCHCLS) NUM, SUM(KSMCHSIZ) SIZ,
To_char( ((SUM(KSMCHSIZ)/COUNT(KSMCHCLS)/1024)),’999,999.00′)||’k’ “AVG SIZE”
FROM X$KSMSP GROUP BY KSMCHCLS;
CLASS NUM SIZ AVG SIZE
freeabl 19010 34519404 1.77k
recr 23581 24967956 1.03k
R-freea 68 1632 .02k
perm 22 39801268 1,766.75k
R-free 34 7238192 207.90k
free 2389 36075980 14.75k
Watch for trends using these guidelines:
a) if ‘free’ memory is low (less than 5mb or so) you may need to increase the shared_pool_size and shared_pool_reserved_size. You should expect ‘free’ memory to increase and decrease over time. Seeing trends where ‘free’ memory decreases consistently is not necessarily a problem, but seeing consistent spikes up and down could be a problem.
b) if ‘freeable’ or ‘perm’ memory continually grows then it is possible you are seeing a memory bug.
c) if ‘freeabl’ and ‘recr’ memory classes are always huge, this indicates that you have a lot of cursor info stored that is not releasing.
d) if ‘free’ memory is huge but you are still getting 4031 errors, the problem is likely reloads and invalids in the library cache causing fragmentation.
-Note says that this query can hang database on HP platforms
See the shared pool parameters
column name format a30
select name,value from v$parameter where name like '%shared_pool%' ;
select x.ksppinm, y.ksppstvl from x$ksppi x , x$ksppcv y where x.indx = y.indx and lower(x.ksppinm) like '%spin%';
SELECT count(*) FROM v$latch_children WHERE NAME = 'library cache';
Shrinking and growing operations from V$SGA_RESIZE_OPS dynamic view:
select to_char(end_time, ‘dd-Mon-yyyy hh24:mi’) end, oper_type, initial_size, target_size, final_size from V$SGA_RESIZE_OPS where component=’shared pool’ order by end;
#shared_pool_summary.sql -get an overview of chunks in the shared pool
select
ksmchcom contents,
count(*) chunks,
sum(decode(ksmchcls, 'recr', ksmchsiz)) recreatable,
sum(decode(ksmchcls, 'freeabl', ksmchsiz)) freeable,
sum(ksmchsiz) total
from
sys.x_$ksmsp
where
inst_id = userenv('Instance') and
ksmchcls not like 'R%'
group by
ksmchcom
#reserved_pool_summary.sql - get an overview of chunks in the reserved pool
select
ksmchcom contents,
count(*) chunks,
sum(decode(ksmchcls, 'R-recr', ksmchsiz)) recreatable,
sum(decode(ksmchcls, 'R-freea', ksmchsiz)) freeable,
sum(ksmchsiz) total
from
sys.x_$ksmspr
where
inst_id = userenv('Instance')
group by
ksmchcom
#save_sqlplus_settings.sql -reset sqlplus settings
set termout off
store set sqlplus_settings replace
clear breaks
clear columns
clear computes
set feedback off
set verify off
set termout on
set define "&"
#restore_sqlplus_settings.sql -reset sqlplus settings
set termout off
@sqlplus_settings
clear breaks
clear columns
clear computes
set termout on
i.Check the shared pool reserved size status
SELECT free_space, avg_free_size, used_space, avg_used_size, REQUEST_MISSES, request_failures, last_miss_size FROM v$shared_pool_reserved;
An ORA-04031 error referencing large failed requests, indicates the Reserved Area is too fragmented. The reserved pool is small when: REQUEST_FAILURES > 0 (and increasing), The DBA should Increase shared_pool_reserved_size and shared_pool_size together. It is possible that too much memory has been allocated to the reserved list. The DBA should Decrease shared_pool_reserved_size, If: REQUEST_MISS = 0 or not increasing
FREE_MEMORY = > 50% of shared_pool_reserved_size minimum
col free_space for 999,999,999,999 head “TOTAL FREE”
col avg_free_size for 999,999,999,999 head “AVERAGE|CHUNK SIZE
col free_count for 999,999,999,999 head “COUNT”
col request_misses for 999,999,999,999 head “REQUEST|MISSES
col request_failures for 999,999,999,999 head “REQUEST|FAILURES”
col max_free_size for 999,999,999,999 head “LARGEST CHUNK”
select free_space, avg_free_size, free_count, max_free_size, request_misses, request_failures from v$shared_pool_reserved;
TOTAL FREE AVERAGE
CHUNK SIZE COUNT LARGEST CHUNK REQUEST
MISSES REQUEST
FAILURES
7,238,192 212,888 34 212,888 0 0
You should also use hidden and unsupported parameter “_shared_pool_reserved_pct” to control reserved pool. This parameter controls the allocated percentage of shared pool for reserved pool. By default it is %5 of the shared pool and if you use ASMM for memory management you can set this value higher like 10 to allocate reserved pool dynamically. When you set the parameter you will see the shared_pool_reserved_size parameter will be adjusted to the new setting. The parameter can not be modified when instance is started. You can use the query below to see the current value
select a.ksppinm “Parameter”, b.ksppstvl “Session Value”, c.ksppstvl “Instance Value” from sys.x$ksppi a, sys.x$ksppcv b, sys.x$ksppsv c where a.indx = b.indx and a.indx = c.indx and a.ksppinm = ‘_shared_pool_reserved_pct’;
Parameter Session Value Instance Value
sharedpool_reserved_pct 10 10
j.When having multiple subheaps:
select KSMCHIDX, ksmchcom ChunkComment,
decode(round(ksmchsiz/1000),0,'0-1K', 1,'1-2K', 2,'2-3K', 3,'3-4K',4,'4-5K',5,'5-6k',6,'6-7k',7,'7-8k',8,'8-9k', 9,'9-10k', '> 10K'), count(*), ksmchcls Status, sum(ksmchsiz) Bytes
from x$ksmsp where KSMCHCOM = 'free memory' group by KSMCHIDX,ksmchcom, ksmchcls, decode(round(ksmchsiz/1000),0,'0-1K', 1,'1-2K', 2,'2-3K', 3,'3-4K',4,'4-5K',5,'5-6k',6,'6-7k',7,'7-8k',8,'8-9k', 9,'9-10k','> 10K');
SubPool SGA_HEAP CHUNKCOMMENT size COUNT(*) STATUS BYTES
1 sga heap(1,0) free memory > 10K 34 R-free 7238192
1 sga heap(1,0) free memory 3-4K 2 free 6284
1 sga heap(1,0) free memory > 10K 241 free 35707400
1 sga heap(1,0) free memory 8-9k 1 free 7712
1 sga heap(1,0) free memory 2-3K 4 free 6752
1 sga heap(1,0) free memory 0-1K 2090 free 133288
1 sga heap(1,0) free memory 9-10k 21 free 188676
1 sga heap(1,0) free memory 1-2K 30 free 25868
If you see lack of large chunks it is possible that you can face with ORA-04031 in near future.
k.Check shared pool at first glance quick diagnostics
select 'You may need to increase the SHARED_POOL_RESERVED_SIZE' Description, 'Request Failures = '||REQUEST_FAILURES Logic
from v$shared_pool_reserved where REQUEST_FAILURES > 0
and 0 != (select to_number(VALUE) from v$parameter
where NAME = 'shared_pool_reserved_size')
union
select 'You may be able to decrease the SHARED_POOL_RESERVED_SIZE' Description,'Request Failures = '||REQUEST_FAILURES Logic
from v$shared_pool_reserved where REQUEST_FAILURES < 5
and 0 != (select to_number(VALUE) from v$parameter
where NAME = 'shared_pool_reserved_size')
l.Memory Usage - object list level view
• Owner - Owner of the object
• Object - Name/namespace of the object
• Sharable Memory - Amount of sharable memory in the shared pool consumed by the object
select OWNER, NAME||' - '||TYPE object,SHARABLE_MEM
from v$db_object_cache where SHARABLE_MEM > 10000
and type in ('PACKAGE','PACKAGE BODY','FUNCTION','PROCEDURE')
order by owner asc ,SHARABLE_MEM desc
SELECT * FROM (SELECT ROW_NUMBER () over (PARTITION BY NAMESPACE ORDER BY SHARABLE_MEM DESC) ROW_within , NAMESPACE, SHARABLE_MEM, SUBSTR(NAME,1,40) NAME FROM V$DB_OBJECT_CACHE ORDER BY SHARABLE_MEM DESC) WHERE ROW_WITHIN <= 2 ORDER BY NAMESPACE, ROW_WITHIN;
ROW_WITHIN NAMESPACE SHARABLE_MEM NAME
1 CLUSTER 2794 C_OBJ#_INTCOL#
2 CLUSTER 1684 SMON_SCN_TO_TIME
1 RSRCPLAN 5117 SYS_GROUP -
Oracle shared pool fragmentation
We are running Identity Manager 7.0 using an Oracle database repository. We've been seeing shared pool fragmentation in the database resulting in various java.io.IOException: ORA-00600: internal error code messages when using bulk actions to create and remove accounts. Flushing the oracle shared pool is the only way we've found to clear these errors. Has anyone run into similar problems and found any solution other than increasing the size of the shared pool and issuing an 'alter system flush shared_pool' command periodically?
Scott Heaton wrote:
We have an application running WebLogic 5.1 against an Oracle 8.1.7.4 database
and are seeing very rapid fragmentation of the Oracle database shared pool, ultimately
resulting in an ORA-04031 error (unable to allocate xxxx bytes of shared memory).
I'm curious if there are are known issues with WebLogic 5.1 regarding the database
shared pool, retaining a handle to SQL statements issues (so that they cannot
be released), or anything similar? Thanks.What sp level of 5.1? We are caching prepared statements in the later versions,
so for every pooled connection there will be up to 10 (or whatever cache size
you set) prepared statements cached for re-use, and each of these will retain
a DBMS-side cursor. I am not an oracle DBA so I don't know if this relates directly
to the shared pool fragmentation...
Joe -
Shared pool cluttered ... ?
Hi,
Notes from Sr.DBA:
Yesterday evening , production operator called me to inform that one of the regular processing was hanging on webash server.
When I analyzed , found that shared pool is totally cluttered and tens of thousands of same program scripts lying in shared pool. I cleared the shared pool and restarted the regular processing.
Please let me know how to find the shared pool is cluttered and tens of thousands of same program scripts lying in shared pool ? Thanks.Your solution is in the first answer of Tom's link Below. This normally happens when you are not using bind variables which increasing your parsing time. This is a very good link. I had used this link to resolve same kind of problem. If it turns out to be bind variables issue, you will need to fix the application code and that will be the right fix. Check this link.
The output of the function in this link will show you all the identical statements in the shared pool after all the literals have been removed.
http://asktom.oracle.com/pls/asktom/f?p=100:11:::::P11_QUESTION_ID:1163635055580
You have so many unanswered questions in your profile. Please mark this question answered if you have your question answered to keep your forum clean. -
Is connection pooling and sharing available on Oracle 9i RDBMS ?
Hello,
I would like to connect from oracle to sql server through db link and ODBC (Heterogenous connectivity). But every session in oracle launch session in sql server. Is it possible to have connection pooling and sharing from Oracle RDBMS level ? I need one solution : when (for example) i run 100 sessions in Oracle i would like to see 10 sessions on sql server. I would like remain 90 sessions from oracle to be queued.
I would mention that i was using Heterogenous connectivity with multithreading agent (agtctl) without success.
appreciate any help :-)There are two concepts you could evaluate, but they are mainly used for connections to the database, not to sqlserver, but if you can make them work with heterogeneous connectivity this could help:
Connection Pooling. When many sessions are connecting to the same database, it could be that some of them remain idle. Oracle can detect them and timed them out letting another session to enter into the database, letting the idle session remain open without closing its session. This is configured by means of the shared server architecture.
Session Multiplexing. Session multiplexing allows the same bandwidth to be used by many sessions at the same time, this enables the server to use fewer network connection endpoints for incoming request. In order for you to configure session multiplexing you have to configure connection manager.
Ref. Oracle® Database Net Services Administrator's Guide
10g Release 2 (10.2)
Part Number B14212-02
~ Madrid
http://hrivera99.blogspot.com/ -
How to set the correct shared pool size and db_buffer_cache using awr
Hi All,
I want to how to set the correct size for shared_pool_size and db_cache_size using shared pool advisory and buffer pool advisory of awr report. I have paste the shared and buffer pool advisory of awr report.
Shared Pool Advisory
* SP: Shared Pool Est LC: Estimated Library Cache Factr: Factor
* Note there is often a 1:Many correlation between a single logical object in the Library Cache, and the physical number of memory objects associated with it. Therefore comparing the number of Lib Cache objects (e.g. in v$librarycache), with the number of Lib Cache Memory Objects is invalid.
Shared Pool Size(M) SP Size Factr Est LC Size (M) Est LC Mem Obj Est LC Time Saved (s) Est LC Time Saved Factr Est LC Load Time (s) Est LC Load Time Factr Est LC Mem Obj Hits (K)
4,096 1.00 471 25,153 184,206 1.00 149 1.00 9,069
4,736 1.16 511 27,328 184,206 1.00 149 1.00 9,766
5,248 1.28 511 27,346 184,206 1.00 149 1.00 9,766
5,760 1.41 511 27,346 184,206 1.00 149 1.00 9,766
6,272 1.53 511 27,346 184,206 1.00 149 1.00 9,766
6,784 1.66 511 27,346 184,206 1.00 149 1.00 9,766
7,296 1.78 511 27,346 184,206 1.00 149 1.00 9,766
7,808 1.91 511 27,346 184,206 1.00 149 1.00 9,766
8,320 2.03 511 27,346 184,206 1.00 149 1.00 9,766
Buffer Pool Advisory
* Only rows with estimated physical reads >0 are displayed
* ordered by Block Size, Buffers For Estimate
P Size for Est (M) Size Factor Buffers (thousands) Est Phys Read Factor Estimated Phys Reads (thousands) Est Phys Read Time Est %DBtime for Rds
D 4,096 0.10 485 1.02 1,002 1 0.00
D 8,192 0.20 970 1.00 987 1 0.00
D 12,288 0.30 1,454 1.00 987 1 0.00
D 16,384 0.40 1,939 1.00 987 1 0.00
D 20,480 0.50 2,424 1.00 987 1 0.00
D 24,576 0.60 2,909 1.00 987 1 0.00
D 28,672 0.70 3,394 1.00 987 1 0.00
D 32,768 0.80 3,878 1.00 987 1 0.00
D 36,864 0.90 4,363 1.00 987 1 0.00
D 40,960 1.00 4,848 1.00 987 1 0.00
D 45,056 1.10 5,333 1.00 987 1 0.00
D 49,152 1.20 5,818 1.00 987 1 0.00
D 53,248 1.30 6,302 1.00 987 1 0.00
D 57,344 1.40 6,787 1.00 987 1 0.00
D 61,440 1.50 7,272 1.00 987 1 0.00
D 65,536 1.60 7,757 1.00 987 1 0.00
D 69,632 1.70 8,242 1.00 987 1 0.00
D 73,728 1.80 8,726 1.00 987 1 0.00
D 77,824 1.90 9,211 1.00 987 1 0.00
D 81,920 2.00 9,696 1.00 987 1 0.00
My shared pool size is 4gb and db_cache_size is 40Gb.
Please help me in configuring the correct size for this.
Thanks and Regards,Hi ,
Actually batch load is taking too much time.
Please find below the 1 hr awr report
Snap Id Snap Time Sessions Cursors/Session
Begin Snap: 6557 27-Nov-11 16:00:06 126 1.3
End Snap: 6558 27-Nov-11 17:00:17 130 1.6
Elapsed: 60.17 (mins)
DB Time: 34.00 (mins)
Report Summary
Cache Sizes
Begin End
Buffer Cache: 40,960M 40,960M Std Block Size: 8K
Shared Pool Size: 4,096M 4,096M Log Buffer: 25,908K
Load Profile
Per Second Per Transaction Per Exec Per Call
DB Time(s): 0.6 1.4 0.00 0.07
DB CPU(s): 0.5 1.2 0.00 0.06
Redo size: 281,296.9 698,483.4
Logical reads: 20,545.6 51,016.4
Block changes: 1,879.5 4,667.0
Physical reads: 123.7 307.2
Physical writes: 66.4 164.8
User calls: 8.2 20.4
Parses: 309.4 768.4
Hard parses: 8.5 21.2
W/A MB processed: 1.7 4.3
Logons: 0.7 1.6
Executes: 1,235.9 3,068.7
Rollbacks: 0.0 0.0
Transactions: 0.4
Instance Efficiency Percentages (Target 100%)
Buffer Nowait %: 100.00 Redo NoWait %: 100.00
Buffer Hit %: 99.66 In-memory Sort %: 100.00
Library Hit %: 99.19 Soft Parse %: 97.25
Execute to Parse %: 74.96 Latch Hit %: 99.97
Parse CPU to Parse Elapsd %: 92.41 % Non-Parse CPU: 98.65
Shared Pool Statistics
Begin End
Memory Usage %: 80.33 82.01
% SQL with executions>1: 90.90 86.48
% Memory for SQL w/exec>1: 90.10 86.89
Top 5 Timed Foreground Events
Event Waits Time(s) Avg wait (ms) % DB time Wait Class
DB CPU 1,789 87.72
db file sequential read 27,531 50 2 2.45 User I/O
db file scattered read 26,322 30 1 1.47 User I/O
row cache lock 1,798 20 11 0.96 Concurrency
OJVM: Generic 36 15 421 0.74 Other
Host CPU (CPUs: 24 Cores: 12 Sockets: )
Load Average Begin Load Average End %User %System %WIO %Idle
0.58 1.50 2.8 0.7 0.1 96.6
Instance CPU
%Total CPU %Busy CPU %DB time waiting for CPU (Resource Manager)
2.2 63.6 0.0
Memory Statistics
Begin End
Host Mem (MB): 131,072.0 131,072.0
SGA use (MB): 50,971.4 50,971.4
PGA use (MB): 545.5 1,066.3
% Host Mem used for SGA+PGA: 39.30 39.70
RAC Statistics
Begin End
Number of Instances: 2 2
Global Cache Load Profile
Per Second Per Transaction
Global Cache blocks received: 3.09 7.68
Global Cache blocks served: 1.86 4.62
GCS/GES messages received: 78.64 195.27
GCS/GES messages sent: 53.82 133.65
DBWR Fusion writes: 0.52 1.30
Estd Interconnect traffic (KB) 65.50
Global Cache Efficiency Percentages (Target local+remote 100%)
Buffer access - local cache %: 99.65
Buffer access - remote cache %: 0.02
Buffer access - disk %: 0.34
Global Cache and Enqueue Services - Workload Characteristics
Avg global enqueue get time (ms): 0.0
Avg global cache cr block receive time (ms): 1.7
Avg global cache current block receive time (ms): 1.0
Avg global cache cr block build time (ms): 0.0
Avg global cache cr block send time (ms): 0.0
Global cache log flushes for cr blocks served %: 1.4
Avg global cache cr block flush time (ms): 0.9
Avg global cache current block pin time (ms): 0.0
Avg global cache current block send time (ms): 0.0
Global cache log flushes for current blocks served %: 0.1
Avg global cache current block flush time (ms): 0.0
Global Cache and Enqueue Services - Messaging Statistics
Avg message sent queue time (ms): 0.0
Avg message sent queue time on ksxp (ms): 0.4
Avg message received queue time (ms): 0.5
Avg GCS message process time (ms): 0.0
Avg GES message process time (ms): 0.0
% of direct sent messages: 79.13
% of indirect sent messages: 17.10
% of flow controlled messages: 3.77
Cluster Interconnect
Begin End
Interface IP Address Pub Source IP Pub Src
en9 10.51.10.61 N Oracle Cluster Repository
Main Report
* Report Summary
* Wait Events Statistics
* SQL Statistics
* Instance Activity Statistics
* IO Stats
* Buffer Pool Statistics
* Advisory Statistics
* Wait Statistics
* Undo Statistics
* Latch Statistics
* Segment Statistics
* Dictionary Cache Statistics
* Library Cache Statistics
* Memory Statistics
* Streams Statistics
* Resource Limit Statistics
* Shared Server Statistics
* init.ora Parameters
More RAC Statistics
* RAC Report Summary
* Global Messaging Statistics
* Global CR Served Stats
* Global CURRENT Served Stats
* Global Cache Transfer Stats
* Interconnect Stats
* Dynamic Remastering Statistics
Back to Top
Statistic Name Time (s) % of DB Time
sql execute elapsed time 1,925.20 94.38
DB CPU 1,789.38 87.72
connection management call elapsed time 99.65 4.89
PL/SQL execution elapsed time 89.81 4.40
parse time elapsed 46.32 2.27
hard parse elapsed time 25.01 1.23
Java execution elapsed time 21.24 1.04
PL/SQL compilation elapsed time 11.92 0.58
failed parse elapsed time 9.37 0.46
hard parse (sharing criteria) elapsed time 8.71 0.43
sequence load elapsed time 0.06 0.00
repeated bind elapsed time 0.02 0.00
hard parse (bind mismatch) elapsed time 0.01 0.00
DB time 2,039.77
background elapsed time 122.00
background cpu time 113.42
Statistic Value End Value
NUM_LCPUS 0
NUM_VCPUS 0
AVG_BUSY_TIME 12,339
AVG_IDLE_TIME 348,838
AVG_IOWAIT_TIME 221
AVG_SYS_TIME 2,274
AVG_USER_TIME 9,944
BUSY_TIME 299,090
IDLE_TIME 8,375,051
IOWAIT_TIME 6,820
SYS_TIME 57,512
USER_TIME 241,578
LOAD 1 2
OS_CPU_WAIT_TIME 312,200
PHYSICAL_MEMORY_BYTES 137,438,953,472
NUM_CPUS 24
NUM_CPU_CORES 12
GLOBAL_RECEIVE_SIZE_MAX 1,310,720
GLOBAL_SEND_SIZE_MAX 1,310,720
TCP_RECEIVE_SIZE_DEFAULT 16,384
TCP_RECEIVE_SIZE_MAX 9,223,372,036,854,775,807
TCP_RECEIVE_SIZE_MIN 4,096
TCP_SEND_SIZE_DEFAULT 16,384
TCP_SEND_SIZE_MAX 9,223,372,036,854,775,807
TCP_SEND_SIZE_MIN 4,096
Back to Wait Events Statistics
Back to Top
Operating System Statistics - Detail
Snap Time Load %busy %user %sys %idle %iowait
27-Nov 16:00:06 0.58
27-Nov 17:00:17 1.50 3.45 2.79 0.66 96.55 0.08
Back to Wait Events Statistics
Back to Top
Foreground Wait Class
* s - second, ms - millisecond - 1000th of a second
* ordered by wait time desc, waits desc
* %Timeouts: value of 0 indicates value was < .5%. Value of null is truly 0
* Captured Time accounts for 95.7% of Total DB time 2,039.77 (s)
* Total FG Wait Time: 163.14 (s) DB CPU time: 1,789.38 (s)
Wait Class Waits %Time -outs Total Wait Time (s) Avg wait (ms) %DB time
DB CPU 1,789 87.72
User I/O 61,229 0 92 1 4.49
Other 102,743 40 31 0 1.50
Concurrency 3,169 10 24 7 1.16
Cluster 58,920 0 11 0 0.52
System I/O 45,407 0 6 0 0.29
Configuration 107 7 1 5 0.03
Commit 383 0 0 1 0.01
Network 15,275 0 0 0 0.00
Application 52 8 0 0 0.00
Back to Wait Events Statistics
Back to Top
Foreground Wait Events
* s - second, ms - millisecond - 1000th of a second
* Only events with Total Wait Time (s) >= .001 are shown
* ordered by wait time desc, waits desc (idle events last)
* %Timeouts: value of 0 indicates value was < .5%. Value of null is truly 0
Event Waits %Time -outs Total Wait Time (s) Avg wait (ms) Waits /txn % DB time
db file sequential read 27,531 0 50 2 18.93 2.45
db file scattered read 26,322 0 30 1 18.10 1.47
row cache lock 1,798 0 20 11 1.24 0.96
OJVM: Generic 36 42 15 421 0.02 0.74
db file parallel read 394 0 7 19 0.27 0.36
control file sequential read 22,248 0 6 0 15.30 0.28
reliable message 4,439 0 4 1 3.05 0.18
gc current grant busy 7,597 0 3 0 5.22 0.16
PX Deq: Slave Session Stats 2,661 0 3 1 1.83 0.16
DFS lock handle 3,208 0 3 1 2.21 0.16
direct path write temp 4,842 0 3 1 3.33 0.15
library cache load lock 39 0 3 72 0.03 0.14
gc cr multi block request 37,008 0 3 0 25.45 0.14
IPC send completion sync 5,451 0 2 0 3.75 0.10
gc cr block 2-way 4,669 0 2 0 3.21 0.09
enq: PS - contention 3,183 33 1 0 2.19 0.06
gc cr grant 2-way 5,151 0 1 0 3.54 0.06
direct path read temp 1,722 0 1 1 1.18 0.05
gc current block 2-way 1,807 0 1 0 1.24 0.03
os thread startup 6 0 1 108 0.00 0.03
name-service call wait 12 0 1 47 0.01 0.03
PX Deq: Signal ACK RSG 2,046 50 0 0 1.41 0.02
log file switch completion 3 0 0 149 0.00 0.02
rdbms ipc reply 3,610 0 0 0 2.48 0.02
gc current grant 2-way 1,432 0 0 0 0.98 0.02
library cache pin 903 32 0 0 0.62 0.02
PX Deq: reap credit 35,815 100 0 0 24.63 0.01
log file sync 383 0 0 1 0.26 0.01
Disk file operations I/O 405 0 0 0 0.28 0.01
library cache lock 418 3 0 0 0.29 0.01
kfk: async disk IO 23,159 0 0 0 15.93 0.01
gc current block busy 4 0 0 35 0.00 0.01
gc current multi block request 1,206 0 0 0 0.83 0.01
ges message buffer allocation 38,526 0 0 0 26.50 0.00
enq: FB - contention 131 0 0 0 0.09 0.00
undo segment extension 8 100 0 6 0.01 0.00
CSS initialization 8 0 0 6 0.01 0.00
SQL*Net message to client 14,600 0 0 0 10.04 0.00
enq: HW - contention 96 0 0 0 0.07 0.00
CSS operation: action 8 0 0 4 0.01 0.00
gc cr block busy 33 0 0 1 0.02 0.00
latch free 30 0 0 1 0.02 0.00
enq: TM - contention 49 6 0 0 0.03 0.00
enq: JQ - contention 19 100 0 1 0.01 0.00
SQL*Net more data to client 666 0 0 0 0.46 0.00
asynch descriptor resize 3,179 100 0 0 2.19 0.00
latch: shared pool 3 0 0 3 0.00 0.00
CSS operation: query 24 0 0 0 0.02 0.00
PX Deq: Signal ACK EXT 72 0 0 0 0.05 0.00
KJC: Wait for msg sends to complete 269 0 0 0 0.19 0.00
latch: object queue header operation 4 0 0 1 0.00 0.00
gc cr block congested 5 0 0 0 0.00 0.00
utl_file I/O 11 0 0 0 0.01 0.00
enq: TO - contention 3 33 0 0 0.00 0.00
SQL*Net message from client 14,600 0 219,478 15033 10.04
jobq slave wait 7,726 100 3,856 499 5.31
PX Deq: Execution Msg 10,556 19 50 5 7.26
PX Deq: Execute Reply 2,946 31 27 9 2.03
PX Deq: Parse Reply 3,157 35 3 1 2.17
PX Deq: Join ACK 2,976 28 2 1 2.05
PX Deq Credit: send blkd 7 14 0 4 0.00
Back to Wait Events Statistics
Back to Top
Background Wait Events
* ordered by wait time desc, waits desc (idle events last)
* Only events with Total Wait Time (s) >= .001 are shown
* %Timeouts: value of 0 indicates value was < .5%. Value of null is truly 0
Event Waits %Time -outs Total Wait Time (s) Avg wait (ms) Waits /txn % bg time
os thread startup 140 0 13 90 0.10 10.35
db file parallel write 8,233 0 6 1 5.66 5.08
log file parallel write 3,906 0 6 1 2.69 4.62
log file sequential read 350 0 5 16 0.24 4.49
control file sequential read 13,737 0 5 0 9.45 3.72
DFS lock handle 2,990 27 2 1 2.06 1.43
db file sequential read 921 0 2 2 0.63 1.39
SQL*Net break/reset to client 18 0 1 81 0.01 1.19
control file parallel write 2,455 0 1 1 1.69 1.12
ges lms sync during dynamic remastering and reconfig 24 100 1 50 0.02 0.98
library cache load lock 35 0 1 24 0.02 0.68
ASM file metadata operation 3,483 0 1 0 2.40 0.65
enq: CO - master slave det 1,203 100 1 0 0.83 0.46
kjbdrmcvtq lmon drm quiesce: ping completion 9 0 1 62 0.01 0.46
enq: WF - contention 11 0 0 35 0.01 0.31
CGS wait for IPC msg 32,702 100 0 0 22.49 0.19
gc object scan 28,788 100 0 0 19.80 0.15
row cache lock 535 0 0 0 0.37 0.14
library cache pin 370 55 0 0 0.25 0.12
ksxr poll remote instances 19,119 100 0 0 13.15 0.11
name-service call wait 6 0 0 19 0.00 0.10
gc current block 2-way 304 0 0 0 0.21 0.09
gc cr block 2-way 267 0 0 0 0.18 0.08
gc cr grant 2-way 355 0 0 0 0.24 0.08
ges LMON to get to FTDONE 3 100 0 24 0.00 0.06
enq: CF - contention 145 76 0 0 0.10 0.05
PX Deq: reap credit 8,842 100 0 0 6.08 0.05
reliable message 126 0 0 0 0.09 0.05
db file scattered read 19 0 0 3 0.01 0.05
library cache lock 162 1 0 0 0.11 0.04
latch: shared pool 2 0 0 27 0.00 0.04
Disk file operations I/O 504 0 0 0 0.35 0.04
gc current grant busy 148 0 0 0 0.10 0.04
gcs log flush sync 84 0 0 1 0.06 0.04
ges message buffer allocation 24,934 0 0 0 17.15 0.02
enq: CR - block range reuse ckpt 83 0 0 0 0.06 0.02
latch free 22 0 0 1 0.02 0.02
CSS operation: action 13 0 0 2 0.01 0.02
CSS initialization 4 0 0 6 0.00 0.02
direct path read 1 0 0 21 0.00 0.02
rdbms ipc reply 153 0 0 0 0.11 0.01
db file parallel read 2 0 0 8 0.00 0.01
direct path write 5 0 0 3 0.00 0.01
gc current multi block request 49 0 0 0 0.03 0.01
gc current block busy 5 0 0 2 0.00 0.01
enq: PS - contention 24 50 0 0 0.02 0.01
gc cr multi block request 54 0 0 0 0.04 0.01
ges generic event 1 100 0 10 0.00 0.01
gc current grant 2-way 35 0 0 0 0.02 0.01
kfk: async disk IO 183 0 0 0 0.13 0.01
Log archive I/O 3 0 0 2 0.00 0.01
gc buffer busy acquire 2 0 0 3 0.00 0.00
LGWR wait for redo copy 123 0 0 0 0.08 0.00
IPC send completion sync 18 0 0 0 0.01 0.00
enq: TA - contention 11 0 0 0 0.01 0.00
read by other session 2 0 0 2 0.00 0.00
enq: TM - contention 9 89 0 0 0.01 0.00
latch: ges resource hash list 135 0 0 0 0.09 0.00
PX Deq: Slave Session Stats 12 0 0 0 0.01 0.00
KJC: Wait for msg sends to complete 89 0 0 0 0.06 0.00
enq: TD - KTF dump entries 8 0 0 0 0.01 0.00
enq: US - contention 7 0 0 0 0.00 0.00
CSS operation: query 12 0 0 0 0.01 0.00
enq: TK - Auto Task Serialization 6 100 0 0 0.00 0.00
PX Deq: Signal ACK RSG 24 50 0 0 0.02 0.00
log file single write 6 0 0 0 0.00 0.00
enq: WL - contention 2 100 0 1 0.00 0.00
ADR block file read 13 0 0 0 0.01 0.00
ADR block file write 5 0 0 0 0.00 0.00
latch: object queue header operation 1 0 0 1 0.00 0.00
gc cr block busy 1 0 0 1 0.00 0.00
rdbms ipc message 103,276 67 126,259 1223 71.03
PX Idle Wait 6,467 67 12,719 1967 4.45
wait for unread message on broadcast channel 7,240 100 7,221 997 4.98
gcs remote message 218,809 84 7,213 33 150.49
DIAG idle wait 203,228 95 7,185 35 139.77
shared server idle wait 121 100 3,630 30000 0.08
ASM background timer 3,343 0 3,611 1080 2.30
Space Manager: slave idle wait 723 100 3,610 4993 0.50
heartbeat monitor sleep 722 100 3,610 5000 0.50
ges remote message 73,089 52 3,609 49 50.27
dispatcher timer 66 88 3,608 54660 0.05
pmon timer 1,474 82 3,607 2447 1.01
PING 1,487 19 3,607 2426 1.02
Streams AQ: qmn slave idle wait 125 0 3,594 28754 0.09
Streams AQ: qmn coordinator idle wait 250 50 3,594 14377 0.17
smon timer 18 50 3,505 194740 0.01
JOX Jit Process Sleep 73 100 976 13370 0.05
class slave wait 56 0 605 10806 0.04
KSV master wait 2,215 98 1 0 1.52
SQL*Net message from client 109 0 0 2 0.07
PX Deq: Parse Reply 27 44 0 1 0.02
PX Deq: Join ACK 30 40 0 1 0.02
PX Deq: Execute Reply 20 30 0 0 0.01
Streams AQ: RAC qmn coordinator idle wait 259 100 0 0 0.18
Back to Wait Events Statistics
Back to Top
Wait Event Histogram
* Units for Total Waits column: K is 1000, M is 1000000, G is 1000000000
* % of Waits: value of .0 indicates value was <.05%; value of null is truly 0
* % of Waits: column heading of <=1s is truly <1024ms, >1s is truly >=1024ms
* Ordered by Event (idle events last)
% of Waits
Event Total Waits <1ms <2ms <4ms <8ms <16ms <32ms <=1s >1s
ADR block file read 13 100.0
ADR block file write 5 100.0
ADR file lock 6 100.0
ARCH wait for archivelog lock 3 100.0
ASM file metadata operation 3483 99.6 .1 .1 .2
CGS wait for IPC msg 32.7K 100.0
CSS initialization 12 50.0 50.0
CSS operation: action 21 28.6 9.5 61.9
CSS operation: query 36 86.1 5.6 8.3
DFS lock handle 6198 98.6 1.2 .1 .1
Disk file operations I/O 909 95.7 3.6 .7
IPC send completion sync 5469 99.9 .1 .0 .0
KJC: Wait for msg sends to complete 313 100.0
LGWR wait for redo copy 122 100.0
Log archive I/O 3 66.7 33.3
OJVM: Generic 36 55.6 44.4
PX Deq: Signal ACK EXT 72 98.6 1.4
PX Deq: Signal ACK RSG 2070 99.7 .0 .1 .0 .1
PX Deq: Slave Session Stats 2673 99.7 .2 .1 .0
PX Deq: reap credit 44.7K 100.0
SQL*Net break/reset to client 20 95.0 5.0
SQL*Net message to client 14.7K 100.0
SQL*Net more data from client 32 100.0
SQL*Net more data to client 689 100.0
asynch descriptor resize 3387 100.0
buffer busy waits 2 100.0
control file parallel write 2455 96.6 2.2 .6 .6 .1
control file sequential read 36K 99.4 .3 .1 .1 .1 .1 .0
db file parallel read 397 8.8 .8 5.5 12.6 17.4 46.3 8.6
db file parallel write 8233 85.4 10.3 2.3 1.4 .4 .1
db file scattered read 26.3K 79.2 1.5 8.2 10.5 .6 .1 .0
db file sequential read 28.4K 60.2 3.3 18.0 18.1 .3 .1 .0
db file single write 2 100.0
direct path read 2 50.0 50.0
direct path read temp 1722 95.8 2.8 .1 .5 .8 .1
direct path write 6 83.3 16.7
direct path write temp 4842 96.3 2.7 .5 .2 .0 .0 .2
enq: AF - task serialization 1 100.0
enq: CF - contention 145 99.3 .7
enq: CO - master slave det 1203 98.9 .8 .2
enq: CR - block range reuse ckpt 83 100.0
enq: DR - contention 2 100.0
enq: FB - contention 131 100.0
enq: HW - contention 97 100.0
enq: JQ - contention 19 89.5 10.5
enq: JS - job run lock - synchronize 3 100.0
enq: MD - contention 1 100.0
enq: MW - contention 2 100.0
enq: PS - contention 3207 99.5 .4 .1
enq: TA - contention 11 100.0
enq: TD - KTF dump entries 8 100.0
enq: TK - Auto Task Serialization 6 100.0
enq: TM - contention 58 100.0
enq: TO - contention 3 100.0
enq: TQ - DDL contention 1 100.0
enq: TS - contention 1 100.0
enq: UL - contention 1 100.0
enq: US - contention 7 100.0
enq: WF - contention 11 81.8 18.2
enq: WL - contention 2 50.0 50.0
gc buffer busy acquire 2 50.0 50.0
gc cr block 2-way 4934 99.9 .1 .0 .0
gc cr block busy 35 68.6 31.4
gc cr block congested 6 100.0
gc cr disk read 2 100.0
gc cr grant 2-way 4824 100.0 .0
gc cr grant congested 2 100.0
gc cr multi block request 37.1K 99.8 .2 .0 .0 .0 .0 .0
gc current block 2-way 2134 99.9 .0 .0
gc current block busy 7 14.3 14.3 14.3 28.6 28.6
gc current block congested 2 100.0
gc current grant 2-way 1337 99.9 .1
gc current grant busy 7123 99.2 .2 .2 .0 .0 .3 .1
gc current grant congested 2 100.0
gc current multi block request 1260 99.8 .2
gc object scan 28.8K 100.0
gcs log flush sync 65 95.4 3.1 1.5
ges LMON to get to FTDONE 3 100.0
ges generic event 1 100.0
ges inquiry response 2 100.0
ges lms sync during dynamic remastering and reconfig 24 16.7 29.2 54.2
ges message buffer allocation 63.1K 100.0
kfk: async disk IO 23.3K 100.0 .0 .0
kjbdrmcvtq lmon drm quiesce: ping completion 9 11.1 88.9
ksxr poll remote instances 19.1K 100.0
latch free 52 59.6 40.4
latch: call allocation 2 100.0
latch: gc element 1 100.0
latch: gcs resource hash 1 100.0
latch: ges resource hash list 135 100.0
latch: object queue header operation 5 40.0 40.0 20.0
latch: shared pool 5 40.0 20.0 20.0 20.0
library cache load lock 74 9.5 5.4 8.1 17.6 10.8 13.5 35.1
library cache lock 493 99.2 .4 .4
library cache pin 1186 98.4 .3 1.2 .1
library cache: mutex X 6 100.0
log file parallel write 3897 72.9 1.5 17.1 7.5 .6 .3 .1
log file sequential read 350 4.6 3.1 59.4 30.0 2.9
log file single write 6 100.0
log file switch completion 3 33.3 66.7
log file sync 385 90.4 3.6 4.7 .8 .5
name-service call wait 18 5.6 5.6 5.6 16.7 44.4 22.2
os thread startup 146 100.0
rdbms ipc reply 3763 99.7 .3
read by other session 2 50.0 50.0
reliable message 4565 99.7 .2 .0 .0 .1
row cache lock 2334 99.3 .2 .1 .1 .3
undo segment extension 8 50.0 37.5 12.5
utl_file I/O 11 100.0
ASM background timer 3343 57.0 .3 .1 .1 .1 21.1 21.4
DIAG idle wait 203.2K 3.4 .2 .4 18.0 41.4 14.8 21.8
JOX Jit Process Sleep 73 2.7 97.3
KSV master wait 2213 99.4 .1 .2 .3
PING 1487 81.0 19.0
PX Deq Credit: send blkd 7 57.1 14.3 14.3 14.3
PX Deq: Execute Reply 2966 59.8 .8 9.5 5.6 10.2 2.6 11.4
PX Deq: Execution Msg 10.6K 72.4 12.1 2.6 2.5 .1 5.6 4.6 .0
PX Deq: Join ACK 3006 77.9 22.1 .1
PX Deq: Parse Reply 3184 67.1 31.1 1.6 .2
PX Idle Wait 6466 .2 8.7 4.3 4.8 .3 .1 5.0 76.6
SQL*Net message from client 14.7K 72.4 2.8 .8 .5 .9 .4 2.8 19.3
Space Manager: slave idle wait 722 100.0
Streams AQ: RAC qmn coordinator idle wait 259 100.0
Streams AQ: qmn coordinator idle wait 250 50.0 50.0
Streams AQ: qmn slave idle wait 125 100.0
class slave wait 55 67.3 7.3 1.8 5.5 1.8 7.3 9.1
dispatcher timer 66 6.1 93.9
gcs remote message 218.6K 7.7 1.8 1.2 1.6 1.7 15.7 70.3
ges remote message 72.9K 29.7 5.1 2.7 2.2 1.5 4.0 54.7
heartbeat monitor sleep 722 100.0
jobq slave wait 7725 .1 .0 99.9
pmon timer 1474 18.4 81.6
rdbms ipc message 103.3K 20.7 2.7 1.5 1.3 .9 .7 40.7 31.6
shared server idle wait 121 100.0
smon timer 18 100.0
wait for unread message on broadcast channel 7238 .3 99.7
Back to Wait Events Statistics
Back to Top
Wait Event Histogram Detail (64 msec to 2 sec)
* Units for Total Waits column: K is 1000, M is 1000000, G is 1000000000
* Units for % of Total Waits: ms is milliseconds s is 1024 milliseconds (approximately 1 second)
* % of Total Waits: total waits for all wait classes, including Idle
* % of Total Waits: value of .0 indicates value was <.05%; value of null is truly 0
* Ordered by Event (only non-idle events are displayed)
% of Total Waits
Event Waits 64ms to 2s <32ms <64ms <1/8s <1/4s <1/2s <1s <2s >=2s
ASM file metadata operation 6 99.8 .1 .1
DFS lock handle 6 99.9 .1 .0
OJVM: Generic 16 55.6 2.8 41.7
PX Deq: Signal ACK RSG 3 99.9 .0 .1
PX Deq: Slave Session Stats 3 99.9 .0 .0 .0
SQL*Net break/reset to client 1 95.0 5.0
control file sequential read 1 100.0 .0
db file parallel read 34 91.4 8.6
db file scattered read 4 100.0 .0 .0
db file sequential read 6 100.0 .0 .0 .0
direct path write temp 11 99.8 .1 .1 .0
enq: WF - contention 2 81.8 18.2
gc cr block 2-way 1 100.0 .0
gc cr multi block request 1 100.0 .0
gc current block 2-way 1 100.0 .0
gc current block busy 2 71.4 28.6
gc current grant busy 8 99.9 .0 .1
ges lms sync during dynamic remastering and reconfig 13 45.8 20.8 33.3
kjbdrmcvtq lmon drm quiesce: ping completion 8 11.1 11.1 77.8
latch: shared pool 1 80.0 20.0
library cache load lock 26 64.9 14.9 12.2 4.1 4.1
log file parallel write 2 99.9 .0 .0
log file sequential read 10 97.1 2.0 .6 .3
log file switch completion 2 33.3 66.7
name-service call wait 4 77.8 22.2
os thread startup 146 100.0
reliable message 4 99.9 .0 .1
row cache lock 2 99.7 .0 .0 .3
Back to Wait Events Statistics
Back to Top
Wait Event Histogram Detail (4 sec to 2 min)
* Units for Total Waits column: K is 1000, M is 1000000, G is 1000000000
* Units for % of Total Waits: s is 1024 milliseconds (approximately 1 second) m is 64*1024 milliseconds (approximately 67 seconds or 1.1 minutes)
* % of Total Waits: total waits for all wait classes, including Idle
* % of Total Waits: value of .0 indicates value was <.05%; value of null is truly 0
* Ordered by Event (only non-idle events are displayed)
% of Total Waits
Event Waits 4s to 2m <2s <4s <8s <16s <32s < 1m < 2m >=2m
row cache lock 6 99.7 .3
Back to Wait Events Statistics
Back to Top
Wait Event Histogram Detail (4 min to 1 hr)
No data exists for this section of the report.
Back to Wait Events Statistics
Back to Top
Service Statistics
* ordered by DB Time
Service Name DB Time (s) DB CPU (s) Physical Reads (K) Logical Reads (K)
ubshost 1,934 1,744 445 73,633
SYS$USERS 105 45 1 404
SYS$BACKGROUND 0 0 1 128
ubshostXDB 0 0 0 0
Back to Wait Events Statistics
Back to Top
Service Wait Class Stats
* Wait Class info for services in the Service Statistics section.
* Total Waits and Time Waited displayed for the following wait classes: User I/O, Concurrency, Administrative, Network
* Time Waited (Wt Time) in seconds
Service Name User I/O Total Wts User I/O Wt Time Concurcy Total Wts Concurcy Wt Time Admin Total Wts Admin Wt Time Network Total Wts Network Wt Time
ubshost 60232 90 2644 4 0 0 13302 0
SYS$USERS 997 2 525 19 0 0 1973 0
SYS$BACKGROUND 1456 2 1258 14 0 0 0 0
I am not able to paste the whole awr report. I have paste some of the sections of awr report.
Please help.
Thanks and Regards,
Maybe you are looking for
-
AVCHD File Structure From MAC to PC
Hello, I know this is sort of off topic but I need the expertise of this forum.... I am the videographer (mac user) for a speaking group and have to film speeches 5-7 minutes in length each week. The problem is how to get the videos to each person wi
-
Finding Part Payment line items in FBL1N report
Dear Sir, Client want to know the line items in vendor accounts that are already assigned to some invoice reference but still not cleared. (Part Payment) For this we mapped Invoice reference field (Column) in FBL1N report. But here in this column whe
-
Attaching a PDF document to an order from Web
Hi, We have a requirement to attached a PDF document to an order in SAP from a web front end (its a custom web application written in cold fusion). We currently create orders from this web application which talks to SAP via XI. I know that using the
-
Transfer iPod everything to a new iTouch
How do I transfer everything that is on my current iPod Nano 3rd Generation to a new iTouch 8GB that I'm planning on purchasing?
-
Pleease Help (UIX with EJB)
it seems that uix cannot be used with ejb and session beans like ADF views. for exampe the master detail between pages doesn't work. i am getting crazy. please give me anykeys about how to use UIX with EJBs and Session beans