Conseil de tuning sur une base avec une grosse table

Bonjour,

J'aimerais avoir vos conseils sur une optimisation de base décisionnelle.

J'ai une base 11g avec un tablespace, avec un datafile qui fait 40Go. Dans ce dernier, il y a une table assez volumineuse (20Go, 70millions d'enregistrements)
Les stats sont a jour.

Lorsque je fais un COUNT(*) sur cette table, la requete prend 9min pour s'executer.
Lorsque je lance un SELECT métier, elle prend plus de 20 min (je l'ai interrompu), et vois plein d'alerte sur un goulot d'étranglement sur les disques (la machine est une VM)
Il n'y a pas l'air d'y avoir de chainage.

Je me demande si ca vaut pas le coup de mettre la table volumineuse sur un autre tablespace, voir meme, de créer plusieurs petits datafiles de 5Go pour parallelliser les acces disque.

Je réfléchie aussi éventuellement au Partitionning.

Qu'en pensez vous ?

Il faut prendre les choses dans le bon ordre.
On fait un diagnostic, on détermine la cause du problème, puis on passe à une solution traitant cette cause.
Sinon, c'est de l'agitation stérile, au petit bonheur la chance...

Que disent précisément ces alertes concernant les disques ?
Vous pouvez utilement générer un rapport statspack ou AWR ciblé sur le COUNT(*) et le mettre à disposition ici.
9 minutes, c'est un temps significatif qui permet d'obtenir des informations de première importance.

Bonjour,

Les indications venaient de Spotlight.

Voici un rapport statpack

Code:

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STATSPACK report for   Database DB Id Instance Inst Num Startup Time Release RAC ~~~~~~~~ ----------- ------------ -------- --------------- ----------- --- 3831552662 inforh 1 21-Févr.-16 04: 11.2.0.3.0 NO 31   Host Name Platform CPUs Cores Sockets Memory (G) ~~~~ ---------------- ---------------------- ----- ----- ------- ------------ VSRVINFORH Microsoft Windows x86 2 2 1 4.0   Snapshot Snap Id Snap Time Sessions Curs/Sess Comment ~~~~~~~~ ---------- ------------------ -------- --------- ------------------ Begin Snap: 32974 24-Févr.-16 12:59:5 32 2.3 2 End Snap: 32975 24-Févr.-16 13:05:1 30 2.4 1 Elapsed: 5.32 (mins) Av Act Sess: 0.8 DB time: 4.24 (mins) DB CPU: 3.45 (mins)   Cache Sizes Begin End ~~~~~~~~~~~ ---------- ---------- Buffer Cache: 1,408M Std Block Size: 8K Shared Pool: 512M Log Buffer: 18,176K   Load Profile Per Second Per Transaction Per Exec Per Call ~~~~~~~~~~~~ ------------------ ----------------- ----------- ----------- DB time(s): 0.8 5.5 0.23 0.42 DB CPU(s): 0.7 4.5 0.19 0.34 Redo size: 7,363.1 51,061.7 Logical reads: 555.7 3,853.5 Block changes: 19.7 136.7 Physical reads: 487.8 3,382.8 Physical writes: 1.9 13.4 User calls: 1.9 13.2 Parses: 1.7 11.5 Hard parses: 0.0 0.0 W/A MB processed: 0.2 1.5 Logons: 0.1 0.8 Executes: 3.5 24.0 Rollbacks: 0.0 0.0 Transactions: 0.1   Instance Efficiency Indicators ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Buffer Nowait %: 100.00 Redo NoWait %: 100.00 Buffer Hit %: 12.22 Optimal W/A Exec %: 100.00 Library Hit %: 99.59 Soft Parse %: 99.62 Execute to Parse %: 51.99 Latch Hit %: 100.00 Parse CPU to Parse Elapsd %: 18.52 % Non-Parse CPU: 99.98   Shared Pool Statistics Begin End ------ ------ Memory Usage %: 81.75 81.74 % SQL with executions>1: 94.18 94.13 % Memory for SQL w/exec>1: 97.62 97.61   Top 5 Timed Events Avg %Total ~~~~~~~~~~~~~~~~~~ wait Call Event Waits Time (s) (ms) Time ----------------------------------------- ------------ ----------- ------ ------ CPU time 208 81.3 db file scattered read 1,257 44 35 17.4 db file sequential read 178 1 7 .5 control file sequential read 1,452 1 1 .4 control file parallel write 119 0 2 .1 ------------------------------------------------------------- Host CPU (CPUs: 2 Cores: 2 Sockets: 1) ~~~~~~~~ Load Average Begin End User System Idle WIO WCPU ------- ------- ------- ------- ------- ------- -------- 6.36 28.14 65.51   Instance CPU ~~~~~~~~~~~~ % Time (seconds) -------- -------------- Host: Total time (s): 638.9 Host: Busy CPU time (s): 220.4 % of time Host is Busy: 34.5 Instance: Total CPU time (s): 207.4 % of Busy CPU used for Instance: 94.1 Instance: Total Database time (s): 275.6 %DB time waiting for CPU (Resource Mgr): 0.0   Memory Statistics Begin End ~~~~~~~~~~~~~~~~~ ------------ ------------ Host Mem (MB): 4,095.6 4,095.6 SGA use (MB): 2,548.6 2,548.6 PGA use (MB): 241.8 238.7 % Host Mem used for SGA+PGA: 68.1 68.1 -------------------------------------------------------------   Time Model System Stats DB/Inst: INFORH/inforh Snaps: 32974-32975 -> Ordered by % of DB time desc, Statistic name   Statistic Time (s) % DB time ----------------------------------- -------------------- --------- sql execute elapsed time 253.4 99.7 DB CPU 207.0 81.5 parse time elapsed 0.2 .1 PL/SQL execution elapsed time 0.1 .1 connection management call elapsed 0.1 .0 failed parse elapsed time 0.1 .0 hard parse elapsed time 0.0 .0 repeated bind elapsed time 0.0 .0 DB time 254.1 background elapsed time 21.5 background cpu time 0.3 ------------------------------------------------------------- Foreground Wait Events DB/Inst: INFORH/inforh Snaps: 32974-32975 -> Only events with Total Wait Time (s) >= .001 are shown -> ordered by Total Wait Time desc, Waits desc (idle events last)   Avg %Total %Tim Total Wait wait Waits Call Event Waits out Time (s) (ms) /txn Time ---------------------------- ------------ ---- ---------- ------ -------- ------ db file scattered read 1,257 0 44 35 27.3 17.4 db file sequential read 145 0 1 7 3.2 .4 control file sequential read 1,163 0 1 1 25.3 .3 log file sync 30 0 0 2 0.7 .0 Disk file operations I/O 11 0 0 1 0.2 .0 SQL*Net message from client 386 0 371 960 8.4 jobq slave wait 714 99 367 514 15.5 Streams AQ: waiting for mess 64 100 320 5007 1.4 SQL*Net message to client 386 0 0 0 8.4 -------------------------------------------------------------   Background Wait Events DB/Inst: INFORH/inforh Snaps: 32974-32975 -> Only events with Total Wait Time (s) >= .001 are shown -> ordered by Total Wait Time desc, Waits desc (idle events last)   Avg %Total %Tim Total Wait wait Waits Call Event Waits out Time (s) (ms) /txn Time ---------------------------- ------------ ---- ---------- ------ -------- ------ control file sequential read 289 0 0 1 6.3 .1 db file sequential read 33 0 0 7 0.7 .1 control file parallel write 119 0 0 2 2.6 .1 os thread startup 13 0 0 13 0.3 .1 log file parallel write 77 0 0 2 1.7 .1 db file parallel write 47 0 0 3 1.0 .0 Disk file operations I/O 12 0 0 4 0.3 .0 direct path read 4 0 0 5 0.1 .0 latch: messages 1 0 0 10 0.0 .0 db file async I/O submit 8 0 0 1 0.2 .0 log file sync 1 0 0 3 0.0 .0 direct path write 1 0 0 1 0.0 .0 rdbms ipc message 1,422 94 6,542 4600 30.9 DIAG idle wait 628 100 637 1014 13.7 shared server idle wait 11 100 330 30014 0.2 pmon timer 105 101 319 3041 2.3 Space Manager: slave idle wa 64 98 316 4942 1.4 Streams AQ: qmn coordinator 22 50 308 14008 0.5 Streams AQ: qmn slave idle w 11 0 308 28016 0.2 dispatcher timer 5 100 300 60019 0.1 smon timer 1 0 49 49209 0.0 SQL*Net message from client 60 0 1 14 1.3 -------------------------------------------------------------   Wait Events (fg and bg) DB/Inst: INFORH/inforh Snaps: 32974-32975 -> s - second, cs - centisecond, ms - millisecond, us - microsecond -> %Timeouts: value of 0 indicates value was < .5%. Value of null is truly 0 -> Only events with Total Wait Time (s) >= .001 are shown -> ordered by Total Wait Time desc, Waits desc (idle events last)   Avg %Total %Tim Total Wait wait Waits Call Event Waits out Time (s) (ms) /txn Time ---------------------------- ------------ ---- ---------- ------ -------- ------ db file scattered read 1,257 0 44 35 27.3 17.4 db file sequential read 178 0 1 7 3.9 .5 control file sequential read 1,452 0 1 1 31.6 .4 control file parallel write 119 0 0 2 2.6 .1 os thread startup 13 0 0 13 0.3 .1 log file parallel write 77 0 0 2 1.7 .1 db file parallel write 47 0 0 3 1.0 .0 log file sync 31 0 0 2 0.7 .0 Disk file operations I/O 23 0 0 3 0.5 .0 direct path read 4 0 0 5 0.1 .0 latch: messages 1 0 0 10 0.0 .0 db file async I/O submit 8 0 0 1 0.2 .0 SQL*Net break/reset to clien 4 0 0 0 0.1 .0 direct path write 1 0 0 1 0.0 .0 rdbms ipc message 1,422 94 6,542 4600 30.9 DIAG idle wait 628 100 637 1014 13.7 SQL*Net message from client 446 0 371 833 9.7 jobq slave wait 714 99 367 514 15.5 shared server idle wait 11 100 330 30014 0.2 Streams AQ: waiting for mess 64 100 320 5007 1.4 pmon timer 105 101 319 3041 2.3 Space Manager: slave idle wa 64 98 316 4942 1.4 Streams AQ: qmn coordinator 22 50 308 14008 0.5 Streams AQ: qmn slave idle w 11 0 308 28016 0.2 dispatcher timer 5 100 300 60019 0.1 smon timer 1 0 49 49209 0.0 SQL*Net message to client 431 0 0 0 9.4 ------------------------------------------------------------- Wait Event Histogram DB/Inst: INFORH/inforh Snaps: 32974-32975 -> Total Waits - units: K is 1000, M is 1000000, G is 1000000000 -> % of Waits - column heading: <=1s is truly <1024ms, >1s is truly >=1024ms -> % of Waits - value: .0 indicates value was <.05%, null is truly 0 -> Ordered by Event (idle events last)   Total ----------------- % of Waits ------------------ Event Waits <1ms <2ms <4ms <8ms <16ms <32ms <=1s >1s -------------------------- ----- ----- ----- ----- ----- ----- ----- ----- ----- ADR block file read 2 100.0 asynch descriptor resize 28 100.0 control file parallel writ 119 12.6 77.3 6.7 .8 .8 1.7 control file sequential re 1452 93.2 3.2 1.3 1.4 .6 .2 .1 db file async I/O submit 8 75.0 12.5 12.5 db file parallel write 47 63.8 17.0 8.5 2.1 4.3 2.1 2.1 db file scattered read 1257 .7 .3 .2 1.4 2.9 59.4 35.0 db file sequential read 188 14.9 1.6 13.3 39.4 24.5 6.4 direct path read 4 50.0 50.0 direct path write 1 100.0 Disk file operations I/O 23 91.3 4.3 4.3 latch: messages 1 100.0 LGWR wait for redo copy 1 100.0 log file parallel write 77 68.8 15.6 3.9 9.1 1.3 1.3 log file sync 31 58.1 22.6 6.5 9.7 3.2 os thread startup 13 15.4 69.2 15.4 SQL*Net break/reset to cli 4 100.0 class slave wait 3 100.0 DIAG idle wait 630 100.0 dispatcher timer 5 100.0 jobq slave wait 714 100.0 pmon timer 106 100.0 rdbms ipc message 1422 .5 .1 .5 .4 1.1 .6 24.4 72.4 shared server idle wait 11 100.0 smon timer 1 100.0 Space Manager: slave idle 64 1.6 98.4 SQL*Net message from clien 446 55.4 23.5 11.0 2.7 .7 2.0 2.2 2.5 SQL*Net message to client 431 100.0 SQL*Net more data from cli 1 100.0 Streams AQ: qmn coordinato 22 50.0 50.0 Streams AQ: qmn slave idle 11 100.0 Streams AQ: waiting for me 64 100.0 -------------------------------------------------------------   SQL ordered by CPU DB/Inst: INFORH/inforh Snaps: 32974-32975 -> Total DB CPU (s): 207 -> Captured SQL accounts for 99.2% of Total DB CPU -> SQL reported below exceeded 1.0% of Total DB CPU   CPU CPU per Elapsd Old Time (s) Executions Exec (s) %Total Time (s) Buffer Gets Hash Value ---------- ------------ ---------- ------ ---------- --------------- ---------- 201.43 1 201.43 97.3 246.32 155,462 1755199020 Module: SQL*Plus select count(*) from refhr.rh_zx8k   ------------------------------------------------------------- SQL ordered by Elapsed time for DB: INFORH Instance: inforh Snaps: 32974 -3297 -> Total DB Time (s): 254 -> Captured SQL accounts for 100.8% of Total DB Time -> SQL reported below exceeded 1.0% of Total DB Time   Elapsed Elap per CPU Old Time (s) Executions Exec (s) %Total Time (s) Physical Reads Hash Value ---------- ------------ ---------- ------ ---------- --------------- ---------- 246.32 1 246.32 96.9 201.43 155,417 1755199020 Module: SQL*Plus select count(*) from refhr.rh_zx8k   ------------------------------------------------------------- SQL ordered by Gets DB/Inst: INFORH/inforh Snaps: 32974-32975 -> End Buffer Gets Threshold: 10000 Total Buffer Gets: 177,259 -> Captured SQL accounts for 100.2% of Total Buffer Gets -> SQL reported below exceeded 1.0% of Total Buffer Gets   CPU Elapsd Old Buffer Gets Executions Gets per Exec %Total Time (s) Time (s) Hash Value --------------- ------------ -------------- ------ -------- --------- ---------- 155,462 1 155,462.0 87.7 201.43 246.32 1755199020 Module: SQL*Plus select count(*) from refhr.rh_zx8k   ------------------------------------------------------------- SQL ordered by Reads DB/Inst: INFORH/inforh Snaps: 32974-32975 -> End Disk Reads Threshold: 1000 Total Disk Reads: 155,607 -> Captured SQL accounts for 100.0% of Total Disk Reads -> SQL reported below exceeded 1.0% of Total Disk Reads   CPU Elapsd Physical Rds Executions Rds per Exec %Total Time (s) Time (s) Hash Value --------------- ------------ -------------- ------ -------- --------- ---------- 155,417 1 155,417.0 99.9 201.43 246.32 1755199020 Module: SQL*Plus select count(*) from refhr.rh_zx8k   ------------------------------------------------------------- SQL ordered by Executions DB/Inst: INFORH/inforh Snaps: 32974-32975 -> End Executions Threshold: 100 Total Executions: 1,106 -> Captured SQL accounts for 107.8% of Total Executions -> SQL reported below exceeded 1.0% of Total Executions   ------------------------------------------------------------- SQL ordered by Parse Calls DB/Inst: INFORH/inforh Snaps: 32974-32975 -> End Parse Calls Threshold: 1000 Total Parse Calls: 531 -> Captured SQL accounts for 93.6% of Total Parse Calls -> SQL reported below exceeded 1.0% of Total Parse Calls   ------------------------------------------------------------- truncate table STATS$TEMP_SQLSTATS * ERREUR à la ligne 1 : ORA-00942: Table ou vue inexistante     Instance Activity Stats DB/Inst: INFORH/inforh Snaps: 32974-32975   Statistic Total per Second per Trans --------------------------------- ------------------ -------------- ------------ active txn count during cleanout 113 0.4 2.5 application wait time 0 0.0 0.0 background checkpoints completed 1 0.0 0.0 background checkpoints started 0 0.0 0.0 background timeouts 1,325 4.2 28.8 Block Cleanout Optim referenced 12 0.0 0.3 branch node splits 1 0.0 0.0 buffer is not pinned count 4,694 14.7 102.0 buffer is pinned count 1,999 6.3 43.5 bytes received via SQL*Net from c 163,683 513.1 3,558.3 bytes sent via SQL*Net to client 139,869 438.5 3,040.6 Cached Commit SCN referenced 0 0.0 0.0 calls to get snapshot scn: kcmgss 1,477 4.6 32.1 calls to kcmgas 424 1.3 9.2 calls to kcmgcs 851 2.7 18.5 CCursor + sql area evicted 0 0.0 0.0 cell physical IO interconnect byt 1,309,904,896 4,106,284.9 ############ change write time 1 0.0 0.0 cleanout - number of ktugct calls 115 0.4 2.5 cleanouts and rollbacks - consist 0 0.0 0.0 cleanouts only - consistent read 0 0.0 0.0 cluster key scan block gets 831 2.6 18.1 cluster key scans 675 2.1 14.7 commit batch performed 0 0.0 0.0 commit batch requested 0 0.0 0.0 commit batch/immediate performed 5 0.0 0.1 commit batch/immediate requested 5 0.0 0.1 commit cleanout failures: block l 0 0.0 0.0 commit cleanout failures: buffer 0 0.0 0.0 commit cleanout failures: callbac 9 0.0 0.2 commit cleanout failures: cannot 0 0.0 0.0 commit cleanouts 702 2.2 15.3 commit cleanouts successfully com 693 2.2 15.1 commit immediate performed 5 0.0 0.1 commit immediate requested 5 0.0 0.1 Commit SCN cached 0 0.0 0.0 commit txn count during cleanout 44 0.1 1.0 concurrency wait time 16 0.1 0.4 consistent changes 12 0.0 0.3 consistent gets 170,354 534.0 3,703.4 consistent gets - examination 1,486 4.7 32.3 consistent gets direct 0 0.0 0.0 consistent gets from cache 170,354 534.0 3,703.4 consistent gets from cache (fastp 167,068 523.7 3,631.9 CPU used by this session 20,757 65.1 451.2 CPU used when call started 20,724 65.0 450.5 CR blocks created 9 0.0 0.2 cursor authentications 1 0.0 0.0 data blocks consistent reads - un 12 0.0 0.3 db block changes 6,286 19.7 136.7 db block gets 6,905 21.7 150.1 db block gets direct 0 0.0 0.0 db block gets from cache 6,905 21.7 150.1 db block gets from cache (fastpat 1,992 6.2 43.3 DB time 97,893 306.9 2,128.1 DBWR checkpoint buffers written 7 0.0 0.2 Instance Activity Stats DB/Inst: INFORH/inforh Snaps: 32974-32975   Statistic Total per Second per Trans --------------------------------- ------------------ -------------- ------------ DBWR checkpoints 0 0.0 0.0 DBWR object drop buffers written 0 0.0 0.0 DBWR revisited being-written buff 0 0.0 0.0 DBWR tablespace checkpoint buffer 0 0.0 0.0 DBWR thread checkpoint buffers wr 7 0.0 0.2 DBWR transaction table writes 1 0.0 0.0 DBWR undo block writes 241 0.8 5.2 deferred (CURRENT) block cleanout 239 0.8 5.2 dirty buffers inspected 376 1.2 8.2 Effective IO time 0 0.0 0.0 enqueue conversions 65 0.2 1.4 enqueue releases 3,655 11.5 79.5 enqueue requests 3,655 11.5 79.5 enqueue timeouts 0 0.0 0.0 enqueue waits 0 0.0 0.0 execute count 1,106 3.5 24.0 failed probes on index block recl 0 0.0 0.0 file io service time 0 0.0 0.0 file io wait time 51,887,905 162,658.0 1,127,997.9 free buffer inspected 156,436 490.4 3,400.8 free buffer requested 155,850 488.6 3,388.0 heap block compress 54 0.2 1.2 Heap Segment Array Inserts 148 0.5 3.2 Heap Segment Array Updates 2 0.0 0.0 hot buffers moved to head of LRU 44,220 138.6 961.3 HSC Heap Segment Block Changes 438 1.4 9.5 immediate (CR) block cleanout app 0 0.0 0.0 immediate (CURRENT) block cleanou 453 1.4 9.9 IMU commits 40 0.1 0.9 IMU contention 0 0.0 0.0 IMU CR rollbacks 0 0.0 0.0 IMU- failed to get a private stra 0 0.0 0.0 IMU Flushes 78 0.2 1.7 IMU ktichg flush 0 0.0 0.0 IMU pool not allocated 0 0.0 0.0 IMU recursive-transaction flush 0 0.0 0.0 IMU Redo allocation size 79,676 249.8 1,732.1 IMU undo allocation size 233,296 731.3 5,071.7 in call idle wait time 916,812 2,874.0 19,930.7 index crx upgrade (positioned) 189 0.6 4.1 index crx upgrade (prefetch) 1 0.0 0.0 index fast full scans (full) 15 0.1 0.3 index fetch by key 2,050 6.4 44.6 index scans kdiixs1 1,750 5.5 38.0 leaf node splits 45 0.1 1.0 leaf node 90-10 splits 9 0.0 0.2 lob reads 0 0.0 0.0 LOB table id lookup cache misses 0 0.0 0.0 lob writes 0 0.0 0.0 lob writes unaligned 0 0.0 0.0 logical read bytes from cache 1,452,105,728 4,552,055.6 ############ logons cumulative 35 0.1 0.8 max cf enq hold time 0 0.0 0.0 messages received 134 0.4 2.9 messages sent 134 0.4 2.9 min active SCN optimization appli 0 0.0 0.0 Instance Activity Stats DB/Inst: INFORH/inforh Snaps: 32974-32975   Statistic Total per Second per Trans --------------------------------- ------------------ -------------- ------------ no buffer to keep pinned count 0 0.0 0.0 no work - consistent read gets 167,866 526.2 3,649.3 non-idle wait count 3,658 11.5 79.5 non-idle wait time 4,781 15.0 103.9 Number of read IOs issued 0 0.0 0.0 opened cursors cumulative 1,049 3.3 22.8 parse count (describe) 0 0.0 0.0 parse count (failures) 1 0.0 0.0 parse count (hard) 2 0.0 0.0 parse count (total) 531 1.7 11.5 parse time cpu 5 0.0 0.1 parse time elapsed 27 0.1 0.6 physical read bytes 1,274,732,544 3,996,026.8 ############ physical read IO requests 1,452 4.6 31.6 physical read total bytes 1,298,522,112 4,070,602.2 ############ physical read total IO requests 2,904 9.1 63.1 physical read total multi block r 1,238 3.9 26.9 physical reads 155,607 487.8 3,382.8 physical reads cache 155,601 487.8 3,382.6 physical reads cache prefetch 154,155 483.2 3,351.2 physical reads direct 6 0.0 0.1 physical reads direct (lob) 0 0.0 0.0 physical reads direct temporary t 0 0.0 0.0 physical reads prefetch warmup 0 0.0 0.0 physical write bytes 5,029,888 15,767.7 109,345.4 physical write IO requests 282 0.9 6.1 physical write total bytes 11,382,784 35,682.7 247,451.8 physical write total IO requests 650 2.0 14.1 physical write total multi block 15 0.1 0.3 physical writes 614 1.9 13.4 physical writes direct 6 0.0 0.1 physical writes direct (lob) 0 0.0 0.0 physical writes direct temporary 0 0.0 0.0 physical writes from cache 608 1.9 13.2 physical writes non checkpoint 520 1.6 11.3 pinned buffers inspected 0 0.0 0.0 pinned cursors current 0 0.0 0.0 prefetch clients - default 0 0.0 0.0 prefetch warmup blocks aged out b 0 0.0 0.0 prefetched blocks aged out before 0 0.0 0.0 process last non-idle time 0 0.0 0.0 recursive calls 8,509 26.7 185.0 recursive cpu usage 244 0.8 5.3 redo blocks checksummed by FG (ex 2,990 9.4 65.0 redo blocks written 4,792 15.0 104.2 redo buffer allocation retries 0 0.0 0.0 redo entries 3,128 9.8 68.0 redo KB read 0 0.0 0.0 redo log space requests 0 0.0 0.0 redo log space wait time 0 0.0 0.0 redo ordering marks 148 0.5 3.2 redo size 2,348,836 7,363.1 51,061.7 redo size for direct writes 0 0.0 0.0 redo subscn max counts 349 1.1 7.6 redo synch long waits 0 0.0 0.0 redo synch time 4 0.0 0.1 Instance Activity Stats DB/Inst: INFORH/inforh Snaps: 32974-32975   Statistic Total per Second per Trans --------------------------------- ------------------ -------------- ------------ redo synch time (usec) 69,091 216.6 1,502.0 redo synch writes 38 0.1 0.8 redo wastage 42,668 133.8 927.6 redo write time 14 0.0 0.3 redo writes 77 0.2 1.7 Requests to/from client 385 1.2 8.4 rollback changes - undo records a 5 0.0 0.1 rollbacks only - consistent read 9 0.0 0.2 RowCR attempts 2 0.0 0.0 RowCR hits 2 0.0 0.0 rows fetched via callback 459 1.4 10.0 scheduler wait time 0 0.0 0.0 session connect time 0 0.0 0.0 session cursor cache hits 515 1.6 11.2 session logical reads 177,259 555.7 3,853.5 session pga memory 11,953,152 37,470.7 259,851.1 session pga memory max 17,785,856 55,755.0 386,649.0 session uga memory 30,066,654,568 94,252,835.6 ############ session uga memory max 62,888,256 197,141.9 1,367,136.0 shared hash latch upgrades - no w 445 1.4 9.7 shared hash latch upgrades - wait 0 0.0 0.0 SMON posted for undo segment shri 0 0.0 0.0 sorts (memory) 1,041 3.3 22.6 sorts (rows) 18,472 57.9 401.6 sql area evicted 0 0.0 0.0 sql area purged 1 0.0 0.0 SQL*Net roundtrips to/from client 385 1.2 8.4 summed dirty queue length 1,825 5.7 39.7 switch current to new buffer 85 0.3 1.9 table fetch by rowid 1,896 5.9 41.2 table fetch continued row 3 0.0 0.1 table scan blocks gotten 285 0.9 6.2 table scan rows gotten 7,137 22.4 155.2 table scans (direct read) 0 0.0 0.0 table scans (long tables) 0 0.0 0.0 table scans (rowid ranges) 0 0.0 0.0 table scans (short tables) 196 0.6 4.3 TBS Extension: tasks created 0 0.0 0.0 TBS Extension: tasks executed 0 0.0 0.0 temp space allocated (bytes) 0 0.0 0.0 total cf enq hold time 109 0.3 2.4 total number of cf enq holders 5 0.0 0.1 total number of times SMON posted 1 0.0 0.0 transaction rollbacks 5 0.0 0.1 undo change vector size 835,948 2,620.5 18,172.8 user calls 608 1.9 13.2 user commits 46 0.1 1.0 user I/O wait time 4,597 14.4 99.9 user rollbacks 0 0.0 0.0 workarea executions - onepass 0 0.0 0.0 workarea executions - optimal 485 1.5 10.5 write clones created in backgroun 0 0.0 0.0 write clones created in foregroun 0 0.0 0.0 -------------------------------------------------------------   Instance Activity Stats DB/Inst: INFORH/inforh Snaps: 32974-32975 -> Statistics with absolute values (should not be diffed)   Statistic Begin Value End Value --------------------------------- --------------- --------------- logons current 32 30 opened cursors current 73 73 session cursor cache count 425,787 426,309 -------------------------------------------------------------   Instance Activity Stats DB/Inst: INFORH/inforh Snaps: 32974-32975 -> Statistics identified by '(derived)' come from sources other than SYSSTAT   Statistic Total per Hour --------------------------------- ------------------ --------- log switches (derived) 0 .00 -------------------------------------------------------------   OS Statistics DB/Inst: INFORH/inforh Snaps: 32974-32975 -> ordered by statistic type (CPU use, Virtual Memory, Hardware Config), Name   Statistic Total ------------------------- ---------------------- BUSY_TIME 22,036 IDLE_TIME 41,850 SYS_TIME 17,977 USER_TIME 4,060 RSRC_MGR_CPU_WAIT_TIME 0 PHYSICAL_MEMORY_BYTES 4,294,500,352 NUM_CPU_CORES 2 NUM_CPUS 2 NUM_CPU_SOCKETS 1 -------------------------------------------------------------   OS Statistics - detail DB/Inst: INFORH/inforh Snaps: 32974-32975   Snap Snapshot Id Day Time Load %Busy %User %System %WIO %WCPU ------ --------------- ------ ------ ------ ------- ------ ------ 32974 Mer. 24 12:59:5 2 32975 Mer. 24 13:05:1 34.5 6.4 28.1 1 ------------------------------------------------------------- IO Stat by Function - summary DB/Inst: INFORH/inforh Snaps: 32974-32975 ->Data Volume values suffixed with M,G,T,P are in multiples of 1024, other values suffixed with K,M,G,T,P are in multiples of 1000 ->ordered by Data Volume (Read+Write) desc   ---------- Read --------- --------- Write -------- --- Wait ---- Data Requests Data Data Requests Data Avg Function Volume /sec Vol/sec Volume /sec Vol/sec Count Tm(ms) --------------- ------ -------- -------- ------ -------- -------- ------ ------ Buffer Cache Re 1215M 4.5 3.8M 1445 0.0 Others 23M 4.6 .1M 4M .7 .0M 1571 0.0 Direct Reads .0 .0 0.0 -------------------------------------------------------------   IO Stat by Function - detail DB/Inst: INFORH/inforh Snaps: 32974-32975 ->ordered by Data Volume (Read+Write) desc   ----------- Read ---------- ----------- Write --------- Small Large Small Large Small Large Small Large Read Read Data Data Write Write Data Data Function Reqs Reqs Read Read Reqs Reqs Writn Writn ------------------ ------ ------ ------ ------ ------ ------ ------ ------ Buffer Cache Reads 207 1238 2M 1213M Others 1452 23M 238 4M Direct Reads 6 5 ------------------------------------------------------------- Tablespace IO Stats DB/Inst: INFORH/inforh Snaps: 32974-32975 ->ordered by IOs (Reads + Writes) desc   Tablespace ------------------------------ Av Av Av Av Buffer Av Buf Reads Reads/s Rd(ms) Blks/Rd Writes Writes/s Waits Wt(ms) -------------- ------- ------ ------- ------------ -------- ---------- ------ USR 1,264 4 35.2 123.0 2 0 0 0.0 SYSAUX 175 1 7.0 1.0 254 1 0 0.0 UNDOTBS1 4 0 5.0 1.0 22 0 0 0.0 SYSTEM 7 0 12.9 1.0 3 0 0 0.0 USERS 1 0 0.0 1.0 1 0 0 0.0 ------------------------------------------------------------- File IO Stats DB/Inst: INFORH/inforh Snaps: 32974-32975 ->Mx Rd Bkt: Max bucket time for single block read ->ordered by Tablespace, File   Tablespace Filename ------------------------ ---------------------------------------------------- Av Mx Av Av Rd Rd Av Av Buffer BufWt Reads Reads/s (ms) Bkt Blks/Rd Writes Writes/s Waits (ms) -------------- ------- ----- --- ------- ------------ -------- ---------- ------ SYSAUX O:\BASE\INFORH\SYSAUX01.DBF 175 1 7.0 32 1.0 254 1 0   SYSTEM O:\BASE\INFORH\SYSTEM01.DBF 7 0 12.9 32 1.0 3 0 0   UNDOTBS1 O:\BASE\INFORH\UNDOTBS01.DBF 4 0 5.0 16 1.0 22 0 0   USERS O:\BASE\INFORH\USERS01.DBF 1 0 0.0 1.0 1 0 0   USR O:\BASE\INFORH\USR1INFO.ORA 200 1 49.1 16 122.4 1 0 0 O:\BASE\INFORH\USR2INFO.ORA 1,064 3 32.6 32 123.1 1 0 0   ------------------------------------------------------------- File Read Histogram Stats DB/Inst: INFORH/inforh Snaps: 32974-32975 ->Number of single block reads in each time range ->Tempfiles are not included ->ordered by Tablespace, File   Tablespace Filename ------------------------ ---------------------------------------------------- 0 - 2 ms 2 - 4 ms 4 - 8 ms 8 - 16 ms 16 - 32 ms 32+ ms ------------ ------------ ------------ ------------ ------------ ------------ USR O:\BASE\INFORH\USR2INFO.ORA 0 0 0 0 2 0   UNDOTBS1 O:\BASE\INFORH\UNDOTBS01.DBF 0 0 2 1 0 0   SYSTEM O:\BASE\INFORH\SYSTEM01.DBF 0 0 1 2 3 0   SYSAUX O:\BASE\INFORH\SYSAUX01.DBF 29 22 64 51 8 0   USR O:\BASE\INFORH\USR1INFO.ORA 0 1 0 2 0 0   ------------------------------------------------------------- Instance Recovery Stats DB/Inst: INFORH/inforh Snaps: 32974-32975 -> B: Begin snapshot, E: End snapshot   Targt Estd Log File Log Ckpt Log Ckpt MTTR MTTR Recovery Actual Target Size Timeout Interval (s) (s) Estd IOs Redo Blks Redo Blks Redo Blks Redo Blks Redo Blks - ----- ----- ---------- --------- --------- ---------- --------- ------------ B 0 0 634 5615 5638 165888 5638 E 0 0 500 12362 10195 165888 10195 ------------------------------------------------------------- Memory Target Advice DB/Inst: INFORH/inforh Snaps: 32974-32975 -> Advice Reset: if this is null, the data shown has been diffed between the Begin and End snapshots. If this is 'Y', the advisor has been reset during this interval due to memory resize operations, and the data shown is since the reset operation.   Memory Size Est. Advice Memory Size (M) Factor DB time (s) Reset --------------- ----------- ------------ ------ 1,536 .5 254 2,304 .8 254 3,072 1.0 254 3,840 1.3 254 4,608 1.5 254 5,376 1.8 254 6,144 2.0 254 -------------------------------------------------------------   Memory Dynamic Components DB/Inst: INFORH/inforh Snaps: 32974-32975 -> Op - memory resize Operation -> Cache: D: Default, K: Keep, R: Recycle -> Mode: DEF: DEFerred mode, IMM: IMMediate mode   Begin Snap End Snap Op Last Op Cache Size (M) Size (M) Count Type/Mode Last Op Time ---------------------- ---------- -------- ------- ---------- --------------- D:buffer cache 1,408 0 SHRINK/DEF 24-Févr. 12:03: 29 java pool 16 0 STATIC large pool 16 0 STATIC PGA Target 1,072 0 STATIC SGA Target 2,000 0 STATIC shared pool 512 0 GROW/DEF 24-Févr. 12:03: 29 streams pool 16 0 SHRINK/DEF 24-Févr. 09:33: 05 -------------------------------------------------------------   Buffer Pool Advisory DB/Inst: INFORH/inforh End Snap: 32975 -> Only rows with estimated physical reads >0 are displayed -> ordered by Pool, Block Size, Buffers For Estimate   Est Phys Estimated Est Size for Size Buffers Read Phys Reads Est Phys % dbtime P Est (M) Factr (thousands) Factr (thousands) Read Time for Rds --- -------- ----- ------------ ------ -------------- ------------ -------- D 128 .1 16 1.1 13,659 20,469 63.7 D 256 .2 32 1.1 13,300 17,395 54.1 D 384 .3 47 1.0 13,134 15,974 49.7 D 512 .4 63 1.0 13,035 15,127 47.1 D 640 .5 79 1.0 12,937 14,293 44.5 D 768 .5 95 1.0 12,836 13,425 41.8 D 896 .6 110 1.0 12,744 12,639 39.3 D 1,024 .7 126 1.0 12,684 12,127 37.7 D 1,152 .8 142 1.0 12,636 11,723 36.5 D 1,280 .9 158 1.0 12,609 11,489 35.8 D 1,408 1.0 173 1.0 12,591 11,338 35.3 D 1,536 1.1 189 1.0 12,575 11,201 34.9 D 1,664 1.2 205 1.0 12,539 10,887 33.9 D 1,792 1.3 221 1.0 12,527 10,786 33.6 D 1,920 1.4 237 1.0 12,511 10,648 33.1 D 2,048 1.5 252 1.0 12,487 10,447 32.5 D 2,176 1.5 268 1.0 12,452 10,148 31.6 D 2,304 1.6 284 1.0 12,401 9,711 30.2 D 2,432 1.7 300 1.0 12,317 8,996 28.0 D 2,560 1.8 315 1.0 12,178 7,807 24.3 -------------------------------------------------------------   Buffer Pool Statistics DB/Inst: INFORH/inforh Snaps: 32974-32975 -> Standard block size Pools D: default, K: keep, R: recycle -> Default Pools for other block sizes: 2k, 4k, 8k, 16k, 32k -> Buffers: the number of buffers. Units of K, M, G are divided by 1000   Free Writ Buffer Pool Buffer Physical Physical Buffer Comp Busy P Buffers Hit% Gets Reads Writes Waits Wait Waits --- ------- ---- -------------- ------------ ----------- ------- ---- ---------- D 173K 12 177,332 155,597 608 0 0 0 ------------------------------------------------------------- PGA Aggr Target Stats DB/Inst: INFORH/inforh Snaps: 32974-32975 -> B: Begin snap E: End snap (rows identified with B or E contain data which is absolute i.e. not diffed over the interval) -> PGA cache hit % - percentage of W/A (WorkArea) data processed only in-memory -> Auto PGA Target - actual workarea memory target -> W/A PGA Used - amount of memory used for all WorkAreas (manual + auto) -> %PGA W/A Mem - percentage of PGA memory allocated to WorkAreas -> %Auto W/A Mem - percentage of WorkArea memory controlled by Auto Mem Mgmt -> %Man W/A Mem - percentage of WorkArea memory under Manual control   PGA Cache Hit % W/A MB Processed Extra W/A MB Read/Written --------------- ---------------- ------------------------- 100.0 68 0   PGA Aggr Target Histogram DB/Inst: INFORH/inforh Snaps: 32974-32975 -> Optimal Executions are purely in-memory operations   Low High Optimal Optimal Total Execs Optimal Execs 1-Pass Execs M-Pass Execs ------- ------- -------------- ------------- ------------ ------------ 2K 4K 422 422 0 0 64K 128K 10 10 0 0 128K 256K 6 6 0 0 512K 1024K 37 37 0 0 1M 2M 10 10 0 0 4M 8M 4 4 0 0 -------------------------------------------------------------   PGA Memory Advisory DB/Inst: INFORH/inforh End Snap: 32975 -> When using Auto Memory Mgmt, minimally choose a pga_aggregate_target value where Estd PGA Overalloc Count is 0   Estd Extra Estd PGA Aggr W/A MB Estd Time PGA Estd PGA Target Size W/A MB Read/Written to Process Cache Overalloc Est (MB) Factr Processed to Disk Bytes (s) Hit % Count ---------- ------ -------------- -------------- ---------- ------ ---------- 134 0.1 36,429 8,660 152.6 81.0 806 268 0.3 36,429 31 123.4 100.0 3 536 0.5 36,429 15 123.4 100.0 0 804 0.8 36,429 15 123.4 100.0 0 1,072 1.0 36,429 15 123.4 100.0 0 1,286 1.2 36,429 0 123.3 100.0 0 1,501 1.4 36,429 0 123.3 100.0 0 1,715 1.6 36,429 0 123.3 100.0 0 1,930 1.8 36,429 0 123.3 100.0 0 2,144 2.0 36,429 0 123.3 100.0 0 3,216 3.0 36,429 0 123.3 100.0 0 4,288 4.0 36,429 0 123.3 100.0 0 6,432 6.0 36,429 0 123.3 100.0 0 8,576 8.0 36,429 0 123.3 100.0 0 ------------------------------------------------------------- Process Memory Summary Stats DB/Inst: INFORH/inforh Snaps: 32974-32975 -> B: Begin snap E: End snap -> All rows below contain absolute values (i.e. not diffed over the interval) -> Max Alloc is Maximum PGA Allocation size at snapshot time Hist Max Alloc is the Historical Max Allocation for still-connected processes -> Num Procs or Allocs: For Begin/End snapshot lines, it is the number of processes. For Category lines, it is the number of allocations -> ordered by Begin/End snapshot, Alloc (MB) desc   Hist Num Avg Std Dev Max Max Procs Alloc Used Freeabl Alloc Alloc Alloc Alloc or Category (MB) (MB) (MB) (MB) (MB) (MB) (MB) Allocs - -------- --------- --------- -------- -------- ------- ------- ------ ------ B -------- 241.8 180.5 44.1 7.1 10.6 43 48 34 Other 193.2 5.7 10.0 42 42 34 Freeable 44.1 .0 2.6 3.8 14 17 PL/SQL 4.1 2.8 .1 .3 1 1 32 SQL .4 .1 .0 .0 0 21 10 E -------- 238.7 179.2 44.1 7.5 10.8 43 48 32 Other 190.1 5.9 10.3 42 42 32 Freeable 44.1 .0 2.6 3.8 14 17 PL/SQL 4.1 2.8 .1 .3 1 1 30 SQL .4 .1 .0 .0 0 21 10 -------------------------------------------------------------   Top Process Memory (by component) DB/Inst: INFORH/inforh Snaps: 32974-32975 -> ordered by Begin/End snapshot, Alloc (MB) desc   Alloc Used Freeabl Max Hist Max PId Category (MB) (MB) (MB) Alloc (MB) Alloc (MB) - ------ ------------- ------- ------- -------- ---------- ---------- B 22 ARC2 -------- 42.9 39.6 1.1 42.9 42.9 Other 41.9 41.9 41.9 Freeable 1.1 .0 1.1 PL/SQL .0 .0 .0 .0 20 ARC0 -------- 32.3 29.6 1.1 32.3 32.3 Other 31.3 31.3 31.3 Freeable 1.1 .0 1.1 PL/SQL .0 .0 .0 .0 21 ARC1 -------- 32.3 29.6 1.1 32.3 32.3 Other 31.3 31.3 31.3 Freeable 1.1 .0 1.1 PL/SQL .0 .0 .0 .0 10 DBW0 -------- 21.1 7.1 13.8 21.1 21.1 Freeable 13.8 .0 13.8 Other 7.3 7.3 7.3 PL/SQL .0 .0 .0 .0 23 ARC3 -------- 17.9 16.8 .0 17.9 17.9 Other 17.9 17.9 17.9 PL/SQL .0 .0 .0 .0 19 SHAD -------- 11.9 9.2 1.8 11.9 48.4 Other 9.0 9.0 24.8 Freeable 1.8 .0 1.8 PL/SQL 1.0 .5 1.0 1.1 SQL .0 .0 .0 20.6 25 CJQ0 -------- 11.4 1.3 9.9 11.4 11.4 Freeable 9.9 .0 9.9 Other 1.5 1.5 1.5 PL/SQL .0 .0 .0 .0 SQL .0 .0 .0 5.3 26 SHAD -------- 11.3 9.1 1.1 11.3 40.1 Other 9.1 9.1 17.1 Freeable 1.1 .0 1.1 PL/SQL 1.0 .4 1.0 1.2 SQL .0 .0 .0 20.7 29 SHAD -------- 10.2 8.2 1.2 10.2 16.9 Other 7.9 7.9 10.4 Freeable 1.2 .0 1.2 PL/SQL 1.0 .9 1.0 1.1 SQL .1 .0 .1 4.2 27 SHAD -------- 8.6 1.5 6.4 8.6 8.6 Freeable 6.4 .0 6.4 Other 1.9 1.9 1.9 PL/SQL .2 .2 .2 .2 SQL .1 .1 .1 6.3 11 LGWR -------- 5.7 4.8 .6 5.7 5.7 Other 5.1 5.1 5.1 Freeable .6 .0 .6 PL/SQL .0 .0 .0 .0 28 Q001 -------- 5.2 3.5 .6 5.2 5.2 Other 4.5 4.5 4.5 Freeable .6 .0 .6 PL/SQL .1 .1 .1 .1 SQL .0 .0 .0 .6   Top Process Memory (by component) DB/Inst: INFORH/inforh Snaps: 32974-32975 -> ordered by Begin/End snapshot, Alloc (MB) desc   Alloc Used Freeabl Max Hist Max PId Category (MB) (MB) (MB) Alloc (MB) Alloc (MB) - ------ ------------- ------- ------- -------- ---------- ---------- B 15 MMON -------- 4.5 2.0 2.0 4.5 4.5 Other 2.4 2.4 2.4 Freeable 2.0 .0 2.0 PL/SQL .1 .1 .1 .1 SQL .0 .0 .0 1.1 33 SHAD -------- 3.5 2.0 .9 3.5 7.3 Other 1.9 1.9 1.9 Freeable .9 .0 .9 PL/SQL .6 .6 .6 .6 SQL .0 .0 .0 4.1 13 SMON -------- 3.0 1.1 1.6 3.0 3.0 Freeable 1.6 .0 1.6 Other 1.4 1.4 1.4 PL/SQL .0 .0 .0 .0 SQL .0 .0 .0 1.4 31 J000 -------- 1.9 .7 .0 1.9 1.9 Other 1.9 1.9 1.9 PL/SQL .0 .0 .0 .8 SQL .0 .0 .0 .1 12 CKPT -------- 1.7 .8 .7 1.7 1.7 Other 1.0 1.0 1.0 Freeable .7 .0 .7 PL/SQL .0 .0 .0 .0 8 DIA0 -------- 1.5 1.3 .1 1.5 1.5 Other 1.4 1.4 1.4 Freeable .1 .0 .1 PL/SQL .0 .0 .0 .0 14 RECO -------- 1.4 .8 .3 1.4 1.4 Other 1.1 1.1 1.1 Freeable .3 .0 .3 PL/SQL .0 .0 .0 .0 SQL .0 .0 .0 .5 17 D000 -------- 1.3 1.1 .0 1.3 1.3 Other 1.3 1.3 1.3 E 22 ARC2 -------- 42.9 39.6 1.1 42.9 42.9 Other 41.9 41.9 41.9 Freeable 1.1 .0 1.1 PL/SQL .0 .0 .0 .0 20 ARC0 -------- 32.3 29.6 1.1 32.3 32.3 Other 31.3 31.3 31.3 Freeable 1.1 .0 1.1 PL/SQL .0 .0 .0 .0 21 ARC1 -------- 32.3 29.6 1.1 32.3 32.3 Other 31.3 31.3 31.3 Freeable 1.1 .0 1.1 PL/SQL .0 .0 .0 .0 10 DBW0 -------- 21.1 7.1 13.8 21.1 21.1 Freeable 13.8 .0 13.8 Other 7.3 7.3 7.3 PL/SQL .0 .0 .0 .0 23 ARC3 -------- 17.9 16.8 .0 17.9 17.9 Other 17.9 17.9 17.9 PL/SQL .0 .0 .0 .0   Top Process Memory (by component) DB/Inst: INFORH/inforh Snaps: 32974-32975 -> ordered by Begin/End snapshot, Alloc (MB) desc   Alloc Used Freeabl Max Hist Max PId Category (MB) (MB) (MB) Alloc (MB) Alloc (MB) - ------ ------------- ------- ------- -------- ---------- ---------- E 19 SHAD -------- 11.9 9.2 1.8 11.9 48.4 Other 9.0 9.0 24.8 Freeable 1.8 .0 1.8 PL/SQL 1.0 .5 1.0 1.1 SQL .0 .0 .0 20.6 25 CJQ0 -------- 11.4 1.3 9.9 11.4 11.4 Freeable 9.9 .0 9.9 Other 1.5 1.5 1.5 PL/SQL .0 .0 .0 .0 SQL .0 .0 .0 5.3 26 SHAD -------- 11.3 9.1 1.1 11.3 40.1 Other 9.1 9.1 17.1 Freeable 1.1 .0 1.1 PL/SQL 1.0 .4 1.0 1.2 SQL .0 .0 .0 20.7 29 SHAD -------- 10.2 8.2 1.2 10.2 16.9 Other 7.9 7.9 10.4 Freeable 1.2 .0 1.2 PL/SQL 1.0 .9 1.0 1.1 SQL .1 .0 .1 4.2 27 SHAD -------- 8.2 1.7 6.2 8.2 8.6 Freeable 6.2 .0 6.2 Other 1.7 1.7 1.7 PL/SQL .2 .2 .2 .2 SQL .1 .1 .1 6.3 11 LGWR -------- 5.7 4.8 .6 5.7 5.7 Other 5.1 5.1 5.1 Freeable .6 .0 .6 PL/SQL .0 .0 .0 .0 28 Q001 -------- 5.2 3.5 .6 5.2 5.2 Other 4.5 4.5 4.5 Freeable .6 .0 .6 PL/SQL .1 .1 .1 .1 SQL .0 .0 .0 .6 15 MMON -------- 4.5 2.0 2.0 4.5 4.5 Other 2.4 2.4 2.4 Freeable 2.0 .0 2.0 PL/SQL .1 .1 .1 .1 SQL .0 .0 .0 1.1 33 SHAD -------- 3.5 2.0 .9 3.5 7.3 Other 1.9 1.9 1.9 Freeable .9 .0 .9 PL/SQL .6 .6 .6 .6 SQL .0 .0 .0 4.1 13 SMON -------- 3.0 1.1 1.8 3.0 3.0 Freeable 1.8 .0 1.8 Other 1.2 1.2 1.2 PL/SQL .0 .0 .0 .0 SQL .0 .0 .0 1.4 12 CKPT -------- 1.7 .8 .7 1.7 1.7 Other 1.0 1.0 1.0 Freeable .7 .0 .7 PL/SQL .0 .0 .0 .0   Top Process Memory (by component) DB/Inst: INFORH/inforh Snaps: 32974-32975 -> ordered by Begin/End snapshot, Alloc (MB) desc   Alloc Used Freeabl Max Hist Max PId Category (MB) (MB) (MB) Alloc (MB) Alloc (MB) - ------ ------------- ------- ------- -------- ---------- ---------- E 8 DIA0 -------- 1.5 1.3 .1 1.5 1.5 Other 1.4 1.4 1.4 Freeable .1 .0 .1 PL/SQL .0 .0 .0 .0 14 RECO -------- 1.4 .8 .3 1.4 1.4 Other 1.1 1.1 1.1 Freeable .3 .0 .3 PL/SQL .0 .0 .0 .0 SQL .0 .0 .0 .5 17 D000 -------- 1.3 1.1 .0 1.3 1.3 Other 1.3 1.3 1.3 37 Q002 -------- 1.1 1.0 .0 1.1 1.1 Other 1.1 1.1 1.1 SQL .0 .0 .0 .0 PL/SQL .0 .0 .0 .0 -------------------------------------------------------------   Undo Segment Summary DB/Inst: INFORH/inforh Snaps: 32974-32975 -> Min/Max TR (mins) - Min and Max Tuned Retention (minutes) -> STO - Snapshot Too Old count, OOS - Out Of Space count -> Undo segment block stats: uS - unexpired Stolen, uR - unexpired Released, uU - unexpired reUsed eS - expired Stolen, eR - expired Released, eU - expired reUsed   Undo Num Undo Number of Max Qry Max Tx Min/Max STO/ uS/uR/uU/ TS# Blocks (K) Transactions Len (s) Concy TR (mins) OOS eS/eR/eU ---- ---------- --------------- -------- ---------- --------- ----- ----------- 2 .2 349 530 3 20,9/20,9 0/0 0/0/0/0/0/0 -------------------------------------------------------------     Undo Segment Stats DB/Inst: INFORH/inforh Snaps: 32974-32975 -> Most recent 35 Undostat rows, ordered by End Time desc   Num Undo Number of Max Qry Max Tx Tun Ret STO/ uS/uR/uU/ End Time Blocks Transactions Len (s) Concy (mins) OOS eS/eR/eU ------------ ----------- ------------ ------- ------- ------- ----- ----------- 24-Févr. 13: 164 349 530 3 21 0/0 0/0/0/0/0/0 01 ------------------------------------------------------------- Latch Activity DB/Inst: INFORH/inforh Snaps: 32974-32975 ->"Get Requests", "Pct Get Miss" and "Avg Slps/Miss" are statistics for willing-to-wait latch get requests ->"NoWait Requests", "Pct NoWait Miss" are for no-wait latch get requests ->"Pct Misses" for both should be very close to 0.0   Pct Avg Wait Pct Get Get Slps Time NoWait NoWait Latch Requests Miss /Miss (s) Requests Miss ------------------------ -------------- ------ ------ ------ ------------ ------ active checkpoint queue 158 0.0 0 0 . . . ------------------------------------------------------------- Latch Sleep breakdown DB/Inst: INFORH/inforh Snaps: 32974-32975 -> ordered by misses desc   Get Spin Latch Name Requests Misses Sleeps Gets -------------------------- --------------- ------------ ----------- ----------- messages 3,062 1 1 0 ------------------------------------------------------------- Latch Miss Sources DB/Inst: INFORH/inforh Snaps: 32974-32975 -> only latches with sleeps are shown -> ordered by name, sleeps desc   NoWait Waiter Latch Name Where Misses Sleeps Sleeps ------------------------ -------------------------- ------- ---------- -------- messages ksarcv 0 1 0 ------------------------------------------------------------- Dictionary Cache Stats DB/Inst: INFORH/inforh Snaps: 32974-32975 ->"Pct Misses" should be very low (< 2% in most cases) ->"Final Usage" is the number of cache entries being used in End Snapshot   Get Pct Scan Pct Mod Final Cache Requests Miss Reqs Miss Reqs Usage ------------------------- ------------ ------ ------- ----- -------- ---------- dc_awr_control 8 0.0 0 2 1 dc_global_oids 28 0.0 0 0 339 dc_object_grants 35 0.0 0 0 358 dc_objects 672 0.1 0 1 4,316 dc_profiles 25 0.0 0 0 2 dc_rollback_segments 66 0.0 0 0 22 dc_segments 11 0.0 0 1 1,693 dc_tablespaces 586 0.0 0 0 8 dc_users 1,712 0.0 0 0 177 global database name 235 0.0 0 0 2 outstanding_alerts 4 0.0 0 0 4 sch_lj_oids 1 0.0 0 0 22 -------------------------------------------------------------     Library Cache Activity DB/Inst: INFORH/inforh Snaps: 32974-32975 ->"Pct Misses" should be very low   Get Pct Pin Pct Invali- Namespace Requests Miss Requests Miss Reloads dations --------------- ------------ ------ -------------- ------ ---------- -------- ACCOUNT_STATUS 28 0.0 0 0 0 BODY 141 0.0 161 0.0 0 0 DBLINK 31 0.0 0 0 0 EDITION 23 0.0 44 0.0 0 0 QUEUE 6 0.0 139 0.0 0 0 SCHEMA 23 0.0 0 0 0 SQL AREA 349 0.6 1,686 0.5 0 1 SQL AREA BUILD 2 100.0 0 0 0 SQL AREA STATS 2 100.0 2 100.0 0 0 SUBSCRIPTION 1 0.0 1 0.0 0 0 TABLE/PROCEDURE 71 1.4 662 0.2 0 0 TRIGGER 16 0.0 16 0.0 0 0 ------------------------------------------------------------- Rule Sets DB/Inst: INFORH/inforh Snaps: 32974-32975 -> * indicates Rule Set activity (re)started between Begin/End snaps -> Top 25 ordered by Evaluations desc   No-SQL SQL Rule * Eval/sec Reloads/sec Eval % Eval % ----------------------------------- - ------------ ----------- ------ ------ SYS.ALERT_QUE_R 0 0 0 0 ------------------------------------------------------------- Streams Pool Advisory DB/Inst: INFORH/inforh End Snap: 32975   Streams Pool Streams Pool Est Spill Est Spill Est Unspill Est Unspill Size (M) Size Factor Count Time (s) Count Time (s) ------------ ------------ --------- --------- ----------- ----------- 16.0 1.0 0 0 0 0 32.0 2.0 0 0 0 0 48.0 3.0 0 0 0 0 64.0 4.0 0 0 0 0 80.0 5.0 0 0 0 0 96.0 6.0 0 0 0 0 112.0 7.0 0 0 0 0 128.0 8.0 0 0 0 0 144.0 9.0 0 0 0 0 160.0 10.0 0 0 0 0 176.0 11.0 0 0 0 0 192.0 12.0 0 0 0 0 208.0 13.0 0 0 0 0 224.0 14.0 0 0 0 0 240.0 15.0 0 0 0 0 256.0 16.0 0 0 0 0 272.0 17.0 0 0 0 0 288.0 18.0 0 0 0 0 304.0 19.0 0 0 0 0 320.0 20.0 0 0 0 0 ------------------------------------------------------------- Shared Pool Advisory DB/Inst: INFORH/inforh End Snap: 32975 -> 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   Est LC Est LC Est LC Est LC Shared SP Est LC Time Time Load Load Est LC Pool Size Size Est LC Saved Saved Time Time Mem Size (M) Factr (M) Mem Obj (s) Factr (s) Factr Obj Hits ---------- ----- -------- ------------ ------- ------ ------- ------ ----------- 320 .6 22 2,633 32,627 .7 17,743 22.7 2,460,898 352 .7 53 3,614 36,681 .7 13,689 17.6 2,596,875 368 .7 69 4,110 42,398 .9 7,972 10.2 2,847,656 384 .8 85 4,497 45,206 .9 5,164 6.6 2,878,085 400 .8 101 5,112 46,070 .9 4,300 5.5 2,885,294 416 .8 117 5,410 46,575 .9 3,795 4.9 2,888,566 432 .8 133 5,668 47,042 .9 3,328 4.3 2,891,462 448 .9 149 6,094 47,535 1.0 2,835 3.6 2,894,266 464 .9 165 6,675 48,032 1.0 2,338 3.0 2,896,740 480 .9 181 7,224 48,551 1.0 1,819 2.3 2,899,680 496 1.0 196 7,943 49,065 1.0 1,305 1.7 2,902,944 512 1.0 212 8,555 49,590 1.0 780 1.0 2,906,192 528 1.0 228 8,767 49,609 1.0 761 1.0 2,907,184 544 1.1 244 8,979 49,630 1.0 740 .9 2,908,194 560 1.1 260 9,191 49,646 1.0 724 .9 2,908,982 576 1.1 276 9,403 49,657 1.0 713 .9 2,909,699 592 1.2 292 9,615 49,691 1.0 679 .9 2,911,176 608 1.2 308 9,827 49,722 1.0 648 .8 2,912,609 624 1.2 324 10,039 49,729 1.0 641 .8 2,912,980 640 1.3 340 10,251 49,734 1.0 636 .8 2,913,392 656 1.3 356 10,463 49,741 1.0 629 .8 2,913,857 704 1.4 404 11,101 49,764 1.0 606 .8 2,914,653 768 1.5 468 13,070 49,817 1.0 553 .7 2,917,249 832 1.6 532 14,675 49,822 1.0 548 .7 2,917,573 896 1.8 592 17,813 49,823 1.0 547 .7 2,917,777 960 1.9 592 17,813 49,823 1.0 547 .7 2,917,887 1,024 2.0 592 17,813 49,823 1.0 547 .7 2,917,887 ------------------------------------------------------------- SGA Target Advisory DB/Inst: INFORH/inforh End Snap: 32975   SGA Target SGA Size Est DB Est DB Est Physical Size (M) Factor Time (s) Time Factor Reads ---------- -------- -------- ----------- -------------- 1,000 .5 36,841 1.1 13,133,997 1,500 .8 33,471 1.0 12,743,666 2,000 1.0 32,131 1.0 12,591,311 2,500 1.3 31,408 1.0 12,510,727 3,000 1.5 29,217 .9 12,178,316 3,500 1.8 28,458 .9 12,178,316 4,000 2.0 28,458 .9 12,178,316 ------------------------------------------------------------- SGA Memory Summary DB/Inst: INFORH/inforh Snaps: 32974-32975   End Size (Bytes) SGA regions Begin Size (Bytes) (if different) ------------------------------ -------------------- -------------------- Database Buffers 1,476,395,008 Fixed Size 2,258,192 Redo Buffers 19,300,352 Variable Size 1,174,407,920 -------------------- -------------------- sum 2,672,361,472 -------------------------------------------------------------     SGA breakdown difference DB/Inst: INFORH/inforh Snaps: 32974-32975 -> Top 35 rows by size, ordered by Pool, Name (note rows with null values for Pool column, or Names showing free memory are always shown) -> Null value for Begin MB or End MB indicates the size of that Pool/Name was insignificant, or zero in that snapshot   Pool Name Begin MB End MB % Diff ------ ------------------------------ -------------- -------------- -------- java p free memory 16.0 16.0 0.00 large free memory 15.5 15.5 0.00 large PX msg pool .5 .5 0.00 shared free memory 93.5 93.5 0.02 shared KGH: NO ACCESS 79.7 79.7 0.00 shared KGLHD 16.0 16.0 0.02 shared KGLH0 115.3 115.4 0.07 shared KGLS 15.0 15.0 0.00 shared PLMCD 12.2 12.2 0.00 shared row cache 7.2 7.2 0.00 shared SQLA 124.0 124.0 0.01 shared write state object 7.2 7.2 0.00 shared XDBSC 14.1 14.1 0.00 stream free memory 15.4 15.4 0.00 stream KTG hash buckets .6 .6 0.00 buffer_cache 1,408.0 1,408.0 0.00 fixed_sga 2.2 2.2 0.00 log_buffer 18.4 18.4 0.00 ------------------------------------------------------------- SQL Memory Statistics DB/Inst: INFORH/inforh Snaps: 32974-32975   Begin End % Diff -------------- -------------- -------------- Avg Cursor Size (KB): 25.45 25.45 -.01 Cursor to Parent ratio: 1.89 1.89 -.01 Total Cursors: 6,596 6,597 .02 Total Parents: 3,490 3,491 .03 ------------------------------------------------------------- init.ora Parameters DB/Inst: INFORH/inforh Snaps: 32974-32975   End value Parameter Name Begin value (if different) ----------------------------- --------------------------------- -------------- audit_file_dest D:\ADMIN\INFORH\ADUMP audit_trail DB compatible 11.2.0.0.0 control_files O:\BASE\INFORH\CONTROL01.CTL, O:\ BASE\INFORH\CONTROL02.CTL db_block_size 8192 db_domain db_name INFORH diagnostic_dest D:\ dispatchers (PROTOCOL=TCP) (SERVICE=INFORHXDB ) log_archive_dest_1 LOCATION=P:\Archivelogs log_archive_format log_%t_%s_%r.arc memory_target 3221225472 open_cursors 300 processes 150 remote_login_passwordfile EXCLUSIVE sga_max_size 2684354560 statistics_level ALL undo_tablespace UNDOTBS1 -------------------------------------------------------------   End of Report ( sp_32974_32975.lst )

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Je l'ai un peu épuré des requetes de supervision, et OEM, ainsu que les Latch Activity afin qu'il ne fasse pas trop de lignes :)
Concernant, les latchs, pas de wait.

Cette fois, le count a duré que 4-5 min

*** Premier constat, le temps est majoritairement consommé en CPU (plus de 80%).
Je l'aurais plutôt imaginé consacré aux entrées sorties.

Code:

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Top 5 Timed Events Avg %Total ~~~~~~~~~~~~~~~~~~ wait Call Event Waits Time (s) (ms) Time ----------------------------------------- ------------ ----------- ------ ------ CPU time 208 81.3 db file scattered read 1,257 44 35 17.4 db file sequential read 178 1 7 .5

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*** Ensuite, les entrées sorties, sans être exceptionnelles, ne sont pas mauvaises.
7 ms en monobloc, 35 ms en multibloc.

On voit plus bas que les lectures sur le tablespace USR se font en moyenne par lot de 123 blocs.
On est donc efficace (ce qui ne serait pas le cas si on ne lisait qu'un bloc à la fois).

Code:

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Tablespace IO Stats DB/Inst: INFORH/inforh Snaps: 32974-32975 ->ordered by IOs (Reads + Writes) desc Tablespace ------------------------------ Av Av Av Av Buffer Av Buf Reads Reads/s Rd(ms) Blks/Rd Writes Writes/s Waits Wt(ms) -------------- ------- ------ ------- ------------ -------- ---------- ------ USR 1,264 4 35.2 123.0 2 0 0 0.0

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*** Je note enfin que vous avez le paramètre STATISTICS_LEVEL=ALL.
Ce simple fait peut suffire à multiplier par 2 ou 3 les temps de traitement.

Ne serait-ce qu'à titre de test, je vous suggère de le repasser à sa valeur par défaut, à savoir TYPICAL.

Je viens de réecrire la requete métier, ce qui m'a permis de passer a 12min.

J'en ai profité pour faire un rapport statpack:

Code:

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Top 5 Timed Events Avg %Total ~~~~~~~~~~~~~~~~~~ wait Call Event Waits Time (s) (ms) Time ----------------------------------------- ------------ ----------- ------ ------ db file sequential read 150,532 663 4 84.6 CPU time 107 13.6 latch: shared pool 5 9 1836 1.2 control file sequential read 4,252 2 1 .3 control file parallel write 414 1 1 .1 ------------------------------------------------------------- .... ... IO Stat by Function - summary DB/Inst: INFORH/inforh Snaps: 32976-32977 ->Data Volume values suffixed with M,G,T,P are in multiples of 1024, other values suffixed with K,M,G,T,P are in multiples of 1000 ->ordered by Data Volume (Read+Write) desc   ---------- Read --------- --------- Write -------- --- Wait ---- Data Requests Data Data Requests Data Avg Function Volume /sec Vol/sec Volume /sec Vol/sec Count Tm(ms) --------------- ------ -------- -------- ------ -------- -------- ------ ------ Buffer Cache Re 1177M 129.7 1.0M 151K 0.0 Others 66M 3.7 .1M 13M .7 .0M 4697 0.0 Direct Reads 31M .0 .0M 0.0 -------------------------------------------------------------   IO Stat by Function - detail DB/Inst: INFORH/inforh Snaps: 32976-32977 ->ordered by Data Volume (Read+Write) desc   ----------- Read ---------- ----------- Write --------- Small Large Small Large Small Large Small Large Read Read Data Data Write Write Data Data Function Reqs Reqs Read Read Reqs Reqs Writn Writn ------------------ ------ ------ ------ ------ ------ ------ ------ ------ Buffer Cache Reads 151K 1177M Others 4264 66M 846 13M Direct Reads 15 31 1M 30M ------------------------------------------------------------- Tablespace IO Stats DB/Inst: INFORH/inforh Snaps: 32976-32977 ->ordered by IOs (Reads + Writes) desc   Tablespace ------------------------------ Av Av Av Av Buffer Av Buf Reads Reads/s Rd(ms) Blks/Rd Writes Writes/s Waits Wt(ms) -------------- ------- ------ ------- ------------ -------- ---------- ------ USR 150,156 129 4.4 1.0 0 0 0 0.0 SYSAUX 139 0 9.6 1.0 477 0 0 0.0 SYSTEM 294 0 5.5 1.0 23 0 0 0.0 UNDOTBS1 4 0 5.0 1.0 41 0 0 0.0 ------------------------------------------------------------- File IO Stats DB/Inst: INFORH/inforh Snaps: 32976-32977 ->Mx Rd Bkt: Max bucket time for single block read ->ordered by Tablespace, File   Tablespace Filename ------------------------ ---------------------------------------------------- Av Mx Av Av Rd Rd Av Av Buffer BufWt Reads Reads/s (ms) Bkt Blks/Rd Writes Writes/s Waits (ms) -------------- ------- ----- --- ------- ------------ -------- ---------- ------ SYSAUX O:\BASE\INFORH\SYSAUX01.DBF 139 0 9.6 ### 1.0 477 0 0   SYSTEM O:\BASE\INFORH\SYSTEM01.DBF 294 0 5.5 32 1.0 23 0 0   UNDOTBS1 O:\BASE\INFORH\UNDOTBS01.DBF 4 0 5.0 8 1.0 41 0 0   USR O:\BASE\INFORH\USR1INFO.ORA 16,838 15 5.4 ### 1.2 0 0 0 O:\BASE\INFORH\USR2INFO.ORA 133,318 115 4.3 ### 1.0 0 0 0   ------------------------------------------------------------- File Read Histogram Stats DB/Inst: INFORH/inforh Snaps: 32976-32977 ->Number of single block reads in each time range ->Tempfiles are not included ->ordered by Tablespace, File   Tablespace Filename ------------------------ ---------------------------------------------------- 0 - 2 ms 2 - 4 ms 4 - 8 ms 8 - 16 ms 16 - 32 ms 32+ ms ------------ ------------ ------------ ------------ ------------ ------------ USR O:\BASE\INFORH\USR2INFO.ORA 54,158 14,661 49,199 13,357 1,585 353   UNDOTBS1 O:\BASE\INFORH\UNDOTBS01.DBF 1 0 3 0 0 0   SYSTEM O:\BASE\INFORH\SYSTEM01.DBF 117 33 56 82 4 0   SYSAUX O:\BASE\INFORH\SYSAUX01.DBF 18 8 49 48 12 3   USR O:\BASE\INFORH\USR1INFO.ORA 3,549 2,146 8,697 2,128 221 47   ------------------------------------------------------------- Instance Recovery Stats DB/Inst: INFORH/inforh Snaps: 32976-32977 -> B: Begin snapshot, E: End snapshot   Targt Estd Log File Log Ckpt Log Ckpt MTTR MTTR Recovery Actual Target Size Timeout Interval (s) (s) Estd IOs Redo Blks Redo Blks Redo Blks Redo Blks Redo Blks - ----- ----- ---------- --------- --------- ---------- --------- ------------ B 0 0 848 14223 14228 165888 14228 E 0 0 387 8116 6020 165888 6020 -------------------------------------------------------------

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J'ai l'impression que la moyenne par lot de bloc est catastrophique?

Qu'en dites vous ?

Je vais tester le parametre STATISTICS_LEVEL = TYPICAL

Citation:

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Envoyé par Le-DOC

J'ai l'impression que la moyenne par lot de bloc est catastrophique?

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Ce sont les balayages complets (de type "table full scan" ou "index fast full scan"), qui se manifestent par des attentes "db file scattered read" ou "direct path read", qui peuvent s'effectuer en mode multibloc.
Et dans ce cas, effectivement, on pourra se préoccuper de savoir combien de blocs sont lus en une seule fois.
C'était notamment pertinent dans le cas du COUNT(*) sans WHERE.

Pour votre nouvelle requête, vous avez des lectures monoblocs "db file sequential read", et c'est probablement tout à fait normal compte-tenu de la position et de la proportion dans la table des lignes à ramener.

On ne peut pas du tout dire génériquement, hors contexte : si je ne lis pas plusieurs blocs d'un coup, c'est que j'ai un problème.

Donc si j'ai bien compris,

Si je suis obligé de faire du full scan (cas par exemple sans WHERE), il est pertinent de regarder le nombre de bloc lu en moyenne ?
et là vu que ma requete a des WHERE, et passe bien par les indexes, elle effectue des db file sequential read ?

Je viens de tester en modifiant le parametre des statistiques, et je suis passé a 10min.

Je vois pas comment je pourrais optimiser ce traitement ?
Voici le plan d'execution au cas ou

Code:

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Plan SELECT STATEMENT ALL_ROWS Cost: 666 116 Bytes: 67 Cardinality: 1 8 SORT AGGREGATE Bytes: 67 Cardinality: 1 7 HASH JOIN Cost: 666 116 Bytes: 896 996 Cardinality: 13 388 1 TABLE ACCESS FULL TABLE REFHR.RH_REFERENTIELS Cost: 19 Bytes: 47 894 Cardinality: 2 177 6 NESTED LOOPS 4 NESTED LOOPS Cost: 666 096 Bytes: 881 235 Cardinality: 19 583 2 TABLE ACCESS FULL TABLE REFHR.RH_ZX00 Cost: 1 098 Bytes: 371 222 Cardinality: 19 538 3 INDEX RANGE SCAN INDEX (UNIQUE) REFHR.PKHR_ZX8K Cost: 3 Cardinality: 244 5 TABLE ACCESS BY INDEX ROWID TABLE REFHR.RH_ZX8K Cost: 34 Bytes: 26 Cardinality: 1

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Citation:

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Envoyé par Le-DOC

Donc si j'ai bien compris,

Si je suis obligé de faire du full scan (cas par exemple sans WHERE), il est pertinent de regarder le nombre de bloc lu en moyenne ?
et là vu que ma requete a des WHERE, et passe bien par les indexes, elle effectue des db file sequential read ?

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C'est bien ça !

Pour votre requête, sauf erreur de ma part, vous ne l'avez pas fournie !
Et le plan d'exécution n'est absolument pas lisible formaté ainsi.
On préfère largement le mode tableau fourni par un AUTOTRACE ou DBMS_XPLAN_DISPLAY_CURSOR.

Voici la requete, ainsi que le plan d'execution de l'autotrace

Code:

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SELECT COUNT(*) FROM REFHR.RH_ZX00, (SELECT * FROM REFHR.RH_ZX8K WHERE RH_ZX8K.CODORG <> '*' AND RH_ZX8K.PERPAI >= 'MT201001' AND RH_ZX8K.PERPAI <= 'MT201012') RH_ZX8K, REFHR.RH_REFERENTIELS RH_REFERENTIELS_RUBRIQUES_2 WHERE RH_ZX00.NUDOSS=RH_ZX8K.NUDOSS AND RH_ZX00.PERPAI=RH_ZX8K.PERPAI AND RH_REFERENTIELS_RUBRIQUES_2.CODE=RH_ZX8K.CODRUB AND ((RH_REFERENTIELS_RUBRIQUES_2.TYPE = 'REG_CODE_RUBRIQUE' AND RH_ZX8K.SOCDOS = 'PAM') or (RH_REFERENTIELS_RUBRIQUES_2.TYPE = 'REG_CODE_RUBRIQUE_CR' AND RH_ZX8K.SOCDOS = 'CR')) AND RH_ZX00.SOCCLE = 'PAM'

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Plan d'exÚcution
----------------------------------------------------------
Plan hash value: 337392210
--------------------------------------------------------------------------------------------------
| Id  | Operation                      | Name            | Rows  | Bytes | Cost(%CPU)| Time     |
--------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT               |                 |     1 |    67 |   666K  (1)| 02:13:14 |
|   1 |  SORT AGGREGATE                |                 |     1 |    67 |     |          |
|*  2 |   HASH JOIN                    |                 | 13388 |   875K|   666K  (1)| 02:13:14 |
|*  3 |    TABLE ACCESS FULL           | RH_REFERENTIELS |  2177 | 47894 |    19   (0)| 00:00:01 |
|   4 |    NESTED LOOPS                |                 |       |       |      |          |
|   5 |     NESTED LOOPS               |                 | 19583 |   860K|   666K  (1)| 02:13:14 |
|*  6 |      TABLE ACCESS FULL         | RH_ZX00         | 19538 |   362K|  1098   (1)| 00:00:14 |
|*  7 |      INDEX RANGE SCAN          | PKHR_ZX8K       |   244 |       |     3   (0)| 00:00:01 |
|*  8 |     TABLE ACCESS BY INDEX ROWID| RH_ZX8K         |     1 |    26 |    34   (0)| 00:00:01 |
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Predicate Information (identified by operation id):
---------------------------------------------------
   2 - access("RH_REFERENTIELS_RUBRIQUES_2"."CODE"="RH_ZX8K"."CODRUB")
       filter("RH_REFERENTIELS_RUBRIQUES_2"."TYPE"='REG_CODE_RUBRIQUE' AND "RH_ZX8K"."SOCDOS"='PAM' OR "RH_REFERENTIELS_RUBRIQUES_2"."TYPE"='REG_CODE_RUBRIQUE_CR'
              AND "RH_ZX8K"."SOCDOS"='CR')
   3 - filter("RH_REFERENTIELS_RUBRIQUES_2"."TYPE"='REG_CODE_RUBRIQUE' OR "RH_REFERENTIELS_RUBRIQUES_2"."TYPE"='REG_CODE_RUBRIQUE_CR')
   6 - filter("RH_ZX00"."PERPAI">='MT201001' AND "RH_ZX00"."PERPAI"<='MT201012' AND "RH_ZX00"."SOCCLE"='PAM')
   7 - access("RH_ZX00"."NUDOSS"="RH_ZX8K"."NUDOSS")
   8 - filter("RH_ZX8K"."CODORG"<>'*' AND "RH_ZX8K"."PERPAI">='MT201001' AND "RH_ZX8K"."PERPAI"<='MT201012' AND ("RH_ZX8K"."SOCDOS"='CR' OR "RH_ZX8K"."SOCDOS"='PAM') AND "RH_ZX00"."PERPAI"="RH_ZX8K"."PERPAI")


Statistiques
----------------------------------------------------------
          0  recursive calls
          1  db block gets
    1543788  consistent gets
     157910  physical reads
          0  redo size
        536  bytes sent via SQL*Net to client
        520  bytes received via SQL*Net from client
          2  SQL*Net roundtrips to/from client
          0  sorts (memory)
          0  sorts (disk)
          1  rows processed

Je pense qu'une corrélation très étroite doit exister entre les 663 secondes dépensées dans le db file sequential read et la double NESTED LOOP (NJL_BATCHING disponible depuis la 11g) dans le dernier plan d'exécution posté. Bien qu'il soit un plan sans les informations tirées de l’exécution réelle telles que A-Rows et Starts, il y a de fortes chances que la partie extérieure de la NESTED LOOP (outer row source) qui est ici représentée par RH_ZX00 est à l’origine de plusieurs exécutions des opérations 7 et 8 (inner row source).
Si vous voulez avoir la certitude que le problème vienne de là alors:

(1) prenez la outline de vote plan d’exécution
(2) changer les USE_NL en USE_HASH
(3) mettez toute la outline comme hint dans votre requête et
(4) exécutez la requête

Bien Cordialement
Mohamed Houri

Il est assez probable que le fait de stocker des dates dans des zones de type caractère concatènes (MT et 2010 et 01)

Citation:

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6 - filter("RH_ZX00"."PERPAI">='MT201001' AND "RH_ZX00"."PERPAI"<='MT201012' AND "RH_ZX00"."SOCCLE"='PAM')

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contribuent à mener l'optimiseur dans les choux.
Assurez-vous que des histogrammes ont été collectés pour la zone PERPAI