Change the order of selection when the index is created

I run the query as

Select emp.ename, dept.dname from emp, dept
where emp.deptno = dept.deptno;

The result is like

ENAME DNAME
---------- --------------
SEARCH FOR SMITH
SALES OF ALLEN
SALES OF WARD
SEARCH FOR JONES
SALES OF MARTIN
SALES OF BLAKE
CLARK ACCOUNTING
SEARCH FOR SCOTT
ACCOUNTING OF KING
SALES OF TURNER
SEARCH FOR ADAMS

ENAME DNAME
---------- --------------
JAMES SALES
SEARCH FORD
MILLER ACCOUNTING

14 selected lines.

But now, I create an index on the deptno column in the emp table as - create index emp_ie1 on emp (deptno); Now, when I run the query even the result is like

ENAME DNAME
---------- --------------
CLARK ACCOUNTING
ACCOUNTING OF KING
MILLER ACCOUNTING
SEARCH FOR SMITH
SEARCH FOR JONES
SEARCH FOR SCOTT
SEARCH FOR ADAMS
SEARCH FORD
SALES OF ALLEN
SALES OF WARD
SALES OF MARTIN

ENAME DNAME
---------- --------------
SALES OF BLAKE
SALES OF TURNER
JAMES SALES

14 selected lines.

Please, note that, once the index is created the default order is on the deptno. Whereas, in the former case, there is no default order. Any who, can explain this behavior? Thank you

Just read this

http://www.DBA-Oracle.com/concepts/index_administration.htm

Tags: Database

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I m not very well, but maybe you have more than 3 GB of RAM and Vista 32 bit.
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SELECT /*+ leading v.Guest_Info v.Guest_Domain_Relation Guest_Address*/
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1     Plan hash value: 3785964411
2      
3     ---------------------------------------------------------------------------------------------------------
4     | Id  | Operation                     | Name                    | Rows  | Bytes | Cost (%CPU)| Time     |
5     ---------------------------------------------------------------------------------------------------------
6     |   0 | SELECT STATEMENT              |                         |  1806 |   199K|     9  (23)| 00:00:01 |
7     |*  1 |  HASH JOIN                    |                         |  1806 |   199K|     9  (23)| 00:00:01 |
8     |   2 |   MERGE JOIN                  |                         |   482 | 48682 |     6  (17)| 00:00:01 |
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11     |*  5 |    SORT JOIN                  |                         |   482 |  2892 |     2  (50)| 00:00:01 |
12     |   6 |     INDEX FULL SCAN           | XPKGuest_INFO          |   482 |  2892 |     1   (0)| 00:00:01 |
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14     |*  8 |    HASH JOIN                  |                         |       |       |            |          |
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16     |  10 |     INDEX FAST FULL SCAN      | XPKGuest_DOMAIN_Relation  |  3493 | 41916 |     1   (0)| 00:00:01 |
17     ---------------------------------------------------------------------------------------------------------
18      
19     Predicate Information (identified by operation id):
20     ---------------------------------------------------
21

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Published by: Y.L on March 20, 2013 13:59

Y.L wrote:
And my another problem here... I don't know why my first clue didn't work...

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-> > FRONT:
WAITING #12: nam = 'db file sequential read' ela = 35089 file #= 15 block #= blocks 20534014 = 1 obj #= tim 64560 = 1294827907110090
WAITING #12: nam = 'db file sequential read' ela = 6434 file #= 15 block #= blocks 61512424 = 1 obj #= tim 64560 = 1294827907116799
WAITING #12: nam = 'db file sequential read' ela = 7961 file #= 15 block #= blocks 33775666 = 1 obj #= tim 64560 = 1294827907124874
WAITING #12: nam = 'db file sequential read' ela = 16681 file #= 15 block #= blocks 60785827 = 1 obj #= tim 64560 = 1294827907143821
WAITING #12: nam = 'db file sequential read' ela = 2380 file #= 15 block #= blocks 60785891 = 1 obj #= tim 64560 = 1294827907147000
WAITING #12: nam = 'db file sequential read' ela = 4219 file #= 15 block #= blocks 33775730 = 1 obj #= tim 64560 = 1294827907151553
WAITING #12: nam = 'db file sequential read' ela = 7218 file #= 15 block #= blocks 58351090 = 1 obj #= tim 64560 = 1294827907158922
WAITING #12: nam = 'db file sequential read' ela = 6140 file #= 15 block #= blocks 20919908 = 1 obj #= tim 64560 = 1294827907165194
WAITING #12: nam = ela 'db file sequential read' = 542 file #= 15 block #= blocks 60637720 = 1 obj #= tim 64560 = 1294827907165975
WAITING #12: nam = 'db file sequential read' ela = 13736 file #= 15 block #= blocks 33350753 = 1 obj #= tim 64560 = 1294827907179807
WAITING #12: nam = 'db file sequential read' ela = 57465 file #= 15 block #= blocks 59840995 = 1 obj #= tim 64560 = 1294827907237569
WAITING #12: nam = 'db file sequential read' ela = file No. 20077 = 15 block #= blocks 11266833 = 1 obj #= tim 64560 = 1294827907257879
WAITING #12: nam = 'db file sequential read' ela = 10642 file #= 15 block #= blocks 34506477 = 1 obj #= tim 64560 = 1294827907268867
WAITING #12: nam = 'db file sequential read' ela = 5393 file #= 15 block #= blocks 20919972 = 1 obj #= tim 64560 = 1294827907275227
WAITING #12: nam = 'db file sequential read' ela = 15308 file #= 15 block #= blocks 61602921 = 1 obj #= tim 64560 = 1294827907291203
WAITING #12: nam = 'db file sequential read' ela = 11228 file #= 15 block #= blocks 34032720 = 1 obj #= tim 64560 = 1294827907303261
WAITING #12: nam = 'db file sequential read' ela = 7885 file #= 15 block #= blocks 60785955 = 1 obj #= tim 64560 = 1294827907311867
WAITING #12: nam = 'db file sequential read' ela = 6652 file #= 15 block #= blocks 19778448 = 1 obj #= tim 64560 = 1294827907319158
WAITING #12: nam = 'db file sequential read' ela = 8735 file #= 15 block #= blocks 34634855 = 1 obj #= tim 64560 = 1294827907328770
WAITING #12: nam = 'db file sequential read' ela = 14235 file #= 15 block #= blocks 61411940 = 1 obj #= tim 64560 = 1294827907343804
WAITING #12: nam = 'db file sequential read' ela = 7173 file #= 15 block #= blocks 33350808 = 1 obj #= tim 64560 = 1294827907351214
WAITING #12: nam = 'db file sequential read' ela = 8033 file #= 15 block #= blocks 60493866 = 1 obj #= tim 64560 = 1294827907359424
WAITING #12: nam = 'db file sequential read' ela = 14654 file #= 15 block #= blocks 19004731 = 1 obj #= tim 64560 = 1294827907374257
WAITING #12: nam = 'db file sequential read' ela = 6116 file #= 15 block #= blocks 34565376 = 1 obj #= tim 64560 = 1294827907380647
WAITING #12: nam = 'db file sequential read' ela = 6203 file #= 15 block #= blocks 20920100 = 1 obj #= tim 64560 = 1294827907387054
WAITING #12: nam = 'db file sequential read' ela = 50627 file #= 15 block #= blocks 61602985 = 1 obj #= tim 64560 = 1294827907437838
WAITING #12: nam = 'db file sequential read' ela = 13752 file #= 15 block #= blocks 33351193 = 1 obj #= tim 64560 = 1294827907451875
WAITING #12: nam = 'db file sequential read' ela = 6883 file #= 15 block #= blocks 58686059 = 1 obj #= tim 64560 = 1294827907459551
WAITING #12: nam = 'db file sequential read' ela = file No. 13284 = 15 block #= blocks 19778511 = 1 obj #= tim 64560 = 1294827907473558
WAITING #12: nam = 'db file sequential read' ela = 16678 file #= 15 block #= blocks 34226211 = 1 obj #= tim 64560 = 1294827907493010
WAITING #12: nam = 'db file sequential read' ela = 9565 file #= 15 block #= blocks 61123267 = 1 obj #= tim 64560 = 1294827907507419
WAITING #12: nam = 'db file sequential read' ela = 6893 file #= 15 block #= blocks 20920164 = 1 obj #= tim 64560 = 1294827907515073
WAITING #12: nam = 'db file sequential read' ela = 9817 file #= 15 block #= blocks 61603049 = 1 obj #= tim 64560 = 1294827907525598
WAITING #12: nam = 'db file sequential read' ela = 4691 file #= 15 block #= blocks 33351248 = 1 obj #= tim 64560 = 1294827907530960
WAITING #12: nam = 'db file sequential read' ela = file No. 25983 = 15 block #= blocks 58351154 = 1 obj #= tim 64560 = 1294827907557661
WAITING #12: nam = 'db file sequential read' ela = 7402 file #= 15 block #= blocks 5096358 = 1 obj #= tim 64560 = 1294827907565927
WAITING #12: nam = 'db file sequential read' ela = 7964 file #= 15 block #= blocks 61603113 = 1 obj #= tim 64560 = 1294827907574570
WAITING #12: nam = 'db file sequential read' ela = 32776 file #= 15 block #= blocks 33549538 = 1 obj #= tim 64560 = 1294827907608063
WAITING #12: nam = 'db file sequential read' ela = 5674 file #= 15 block #= blocks 60493930 = 1 obj #= tim 64560 = 1294827907614596
WAITING #12: nam = 'db file sequential read' ela = 9525 file #= 15 block #= blocks 61512488 = 1 obj #= tim 64560 = 1294827907625007
WAITING #12: nam = 'db file sequential read' ela = 15729 file #= 15 block #= blocks 33549602 = 1 obj #= tim 64560 = 1294827907641538
WAITING #12: nam = 'db file sequential read' ela = file No. 11510 = 15 block #= blocks 60902458 = 1 obj #= tim 64560 = 1294827907653819
WAITING #12: nam = 'db file sequential read' ela = 26431 files #= 15 block #= blocks 59841058 = 1 obj #= tim 64560 = 1294827907680940
WAITING #12: nam = 'db file sequential read' ela = 9196 file #= 15 block #= blocks 33350809 = 1 obj #= tim 64560 = 1294827907690434
WAITING #12: nam = 'db file sequential read' ela = 7745 file #= 15 block #= blocks 60296291 = 1 obj #= tim 64560 = 1294827907698353
WAITING #12: nam = 'db file sequential read' ela = 429 file #= 15 block #= blocks 61603177 = 1 obj #= tim 64560 = 1294827907698953
WAITING #12: nam = 'db file sequential read' ela = 8459 file #= 15 block #= blocks 33351194 = 1 obj #= tim 64560 = 1294827907707695
WAITING #12: nam = 'db file sequential read' ela = 25998 file #= 15 block #= blocks 49598412 = 1 obj #= tim 64560 = 1294827907733890

2011-01-12 11:25:07.742
WAITING #12: nam = 'db file sequential read' ela = 7988 file #= 15 block #= blocks 11357900 = 1 obj #= tim 64560 = 1294827907742683
WAITING #12: nam = 'db file sequential read' ela = 10066 file #= 15 block #= blocks 61512552 = 1 obj #= tim 64560 = 1294827907753540
WAITING #12: nam = 'db file sequential read' ela = 8400 file #= 15 block #= blocks 33775858 = 1 obj #= tim 64560 = 1294827907762668
WAITING #12: nam = 'db file sequential read' ela = 11750 file #= 15 block #= blocks 60636761 = 1 obj #= tim 64560 = 1294827907774667
WAITING #12: nam = 'db file sequential read' ela = 16933 file #= 15 block #= blocks 20533183 = 1 obj #= tim 64560 = 1294827907791839
WAITING #12: nam = 'db file sequential read' ela = 8895 file #= 15 block #= blocks 61603241 = 1 obj #= tim 64560 = 1294827907801047
WAITING #12: nam = 'db file sequential read' ela = file No. 12685 = 15 block #= blocks 33775922 = 1 obj #= tim 64560 = 1294827907813913
WAITING #12: nam = 'db file sequential read' ela = file No. 12664 = 15 block #= blocks 60493994 = 1 obj #= tim 64560 = 1294827907827379
WAITING #12: nam = 'db file sequential read' ela = 8271 file #= 15 block #= blocks 19372356 = 1 obj #= tim 64560 = 1294827907835881
WAITING #12: nam = 'db file sequential read' ela = file No. 10825 = 15 block #= blocks 59338524 = 1 obj #= tim 64560 = 1294827907847439
WAITING #12: nam = 'db file sequential read' ela = 13086 file #= 15 block #= blocks 49440992 = 1 obj #= tim 64793 = 1294827907862022
WAITING #12: nam = 'db file sequential read' ela = file No. 16491 = 15 block #= blocks 32853984 = 1 obj #= tim 64793 = 1294827907879282
WAITING #12: nam = 'db file sequential read' ela = 9349 file #= 15 block #= blocks 60133021 = 1 obj #= tim 64793 = 1294827907888849
WAITING #12: nam = 'db file sequential read' ela = 5680 files #= 15 block #= blocks 20370585 = 1 obj #= tim 64793 = 1294827907895281
WAITING #12: nam = 'db file sequential read' ela = 34021 file #= 15 block #= blocks 58183834 = 1 obj #= tim 64793 = 1294827907930014
WAITING #12: nam = 'db file sequential read' ela = 8574 file #= 15 block #= blocks 32179028 = 1 obj #= tim 64793 = 1294827907938813
WAITING #12: nam = 'db file sequential read' ela = file No. 10862 = 15 block #= blocks 49402735 = 1 obj #= tim 64793 = 1294827907949821
WAITING #12: nam = 'db file sequential read' ela = 4501 file #= 15 block #= blocks 11270933 = 1 obj #= tim 64793 = 1294827907954533
WAITING #12: nam = 'db file sequential read' ela = 9936 file #= 15 block #= blocks 61007523 = 1 obj #= tim 64793 = 1294827907964616
WAITING #12: nam = 'db file sequential read' ela = 7631 file #= 15 block #= blocks 34399970 = 1 obj #= tim 64793 = 1294827907972457
WAITING #12: nam = 'db file sequential read' ela = 6162 file #= 15 block #= blocks 60305187 = 1 obj #= tim 64793 = 1294827907978797
WAITING #12: nam = 'db file sequential read' ela = 8555 file #= 15 block #= blocks 20912586 = 1 obj #= tim 64793 = 1294827907987532
WAITING #12: nam = 'db file sequential read' ela = 9499 file #= 15 block #= blocks 61007587 = 1 obj #= tim 64793 = 1294827907997296
WAITING #12: nam = 'db file sequential read' ela = 23690 file #= 15 block #= blocks 19769014 = 1 obj #= tim 64793 = 1294827908024105
WAITING #12: nam = 'db file sequential read' ela = 7081 file #= 15 block #= blocks 61314072 = 1 obj #= tim 64793 = 1294827908031968
WAITING #12: nam = 'db file sequential read' ela = 31727 file #= 15 block #= blocks 34026602 = 1 obj #= tim 64793 = 1294827908063914
WAITING #12: nam = 'db file sequential read' ela = 4932 file #= 15 block #= blocks 60905313 = 1 obj #= tim 64793 = 1294827908069052
WAITING #12: nam = 'db file sequential read' ela = 6616 file #= 15 block #= blocks 20912650 = 1 obj #= tim 64793 = 1294827908075835
WAITING #12: nam = 'db file sequential read' ela = 8443 file #= 15 block #= blocks 33781968 = 1 obj #= tim 64793 = 1294827908084594
WAITING #12: nam = 'db file sequential read' ela = 22291 file #= 15 block #= blocks 60641967 = 1 obj #= tim 64793 = 1294827908107052
WAITING #12: nam = 'db file sequential read' ela = 6610 file #= 15 block #= blocks 18991774 = 1 obj #= tim 64793 = 1294827908113879
WAITING #12: nam = 'db file sequential read' ela = 6493 file #= 15 block #= blocks 34622382 = 1 obj #= tim 64793 = 1294827908120535
WAITING #12: nam = 'db file sequential read' ela = 5028 file #= 15 block #= blocks 20912714 = 1 obj #= tim 64793 = 1294827908125861
WAITING #12: nam = 'db file sequential read' ela = file No. 11834 = 15 block #= blocks 61679845 = 1 obj #= tim 64793 = 1294827908137858
WAITING #12: nam = 'db file sequential read' ela = 4261 file #= 15 block #= blocks 34498166 = 1 obj #= tim 64793 = 1294827908142305
WAITING #12: nam = 'db file sequential read' ela = 19267 file #= 15 block #= blocks 60905377 = 1 obj #= tim 64793 = 1294827908161695
WAITING #12: nam = 'db file sequential read' ela = file No. 14108 = 15 block #= blocks 19769078 = 1 obj #= tim 64793 = 1294827908176046
WAITING #12: nam = 'db file sequential read' ela = 4128 file #= 15 block #= blocks 33781465 = 1 obj #= tim 64793 = 1294827908180396
WAITING #12: nam = 'db file sequential read' ela = 9986 file #= 15 block #= blocks 61007651 = 1 obj #= tim 64793 = 1294827908190535
WAITING #12: nam = 'db file sequential read' ela = 8907 file #= 15 block #= blocks 20912778 = 1 obj #= tim 64793 = 1294827908199614
WAITING #12: nam = 'db file sequential read' ela = 12023 file #= 15 block #= blocks 34230838 = 1 obj #= tim 64793 = 1294827908211852
WAITING #12: nam = 'db file sequential read' ela = 29837 file #= 15 block #= blocks 60905441 = 1 obj #= tim 64793 = 1294827908241853
WAITING #12: nam = 'db file sequential read' ela = 5989 file #= 15 block #= blocks 60133085 = 1 obj #= tim 64793 = 1294827908248065
WAITING #12: nam = 'db file sequential read' ela = 74172 file #= 15 block #= blocks 33357369 = 1 obj #= tim 64793 = 1294827908322391
WAITING #12: nam = 'db file sequential read' ela = 5443 file #= 15 block #= blocks 60498917 = 1 obj #= tim 64793 = 1294827908328064
WAITING #12: nam = 'db file sequential read' ela = 4645 file #= 15 block #= blocks 20912842 = 1 obj #= tim 64793 = 1294827908332912
WAITING #12: nam = 'db file sequential read' ela = file No. 13595 = 15 block #= blocks 61679909 = 1 obj #= tim 64793 = 1294827908346618
WAITING #12: nam = 'db file sequential read' ela = 9120 file #= 15 block #= blocks 58356376 = 1 obj #= tim 64793 = 1294827908355975
WAITING #12: nam = 'db file sequential read' ela = 3186 file #= 15 block #= blocks 19385867 = 1 obj #= tim 64793 = 1294827908359374
WAITING #12: nam = 'db file sequential read' ela = 5114 file #= 15 block #= blocks 61589533 = 1 obj #= tim 64793 = 1294827908364630
WAITING #12: nam = 'db file sequential read' ela = 42263 file #= 15 block #= blocks 33356474 = 1 obj #= tim 64793 = 1294827908407045
WAITING #12: nam = 'db file sequential read' ela = 10683 file #= 15 block #= blocks 58183898 = 1 obj #= tim 64793 = 1294827908417994
WAITING #12: nam = 'db file sequential read' ela = file No. 10284 = 15 block #= blocks 20529486 = 1 obj #= tim 64793 = 1294827908429134
WAITING #12: nam = 'db file sequential read' ela = file No. 12544 = 15 block #= blocks 60498981 = 1 obj #= tim 64793 = 1294827908441945
WAITING #12: nam = 'db file sequential read' ela = 8311 file #= 15 block #= blocks 33191548 = 1 obj #= tim 64793 = 1294827908451011
WAITING #12: nam = 'db file sequential read' ela = 4261 file #= 15 block #= blocks 59083610 = 1 obj #= tim 64793 = 1294827908455902
WAITING #12: nam = 'db file sequential read' ela = 4653 file #= 15 block #= blocks 18991837 = 1 obj #= tim 64793 = 1294827908461264
WAITING #12: nam = 'db file sequential read' ela = 4905 file #= 15 block #= blocks 34685472 = 1 obj #= tim 64793 = 1294827908466897
WAITING #12: nam = 'db file sequential read' ela = file No. 12360 = 15 block #= blocks 61775403 = 1 obj #= tim 64793 = 1294827908480080
WAITING #12: nam = 'db file sequential read' ela = 6956 file #= 15 block #= blocks 58921225 = 1 obj #= tim 64793 = 1294827908487704
WAITING #12: nam = 'db file sequential read' ela = 6068 file #= 15 block #= blocks 19769142 = 1 obj #= tim 64793 = 1294827908494608
WAITING #12: nam = 'db file sequential read' ela = 5249 file #= 15 block #= blocks 33781528 = 1 obj #= tim 64793 = 1294827908500666
WAITING #12: nam = 'db file sequential read' ela = 6013 file #= 15 block #= blocks 60905505 = 1 obj #= tim 64793 = 1294827908507366
WAITING #12: nam = 'db file sequential read' ela = 3014 file #= 15 block #= blocks 20912970 = 1 obj #= tim 64793 = 1294827908511019
WAITING #12: nam = 'db file sequential read' ela = 3636 file #= 15 block #= blocks 33781591 = 1 obj #= tim 64793 = 1294827908515425
WAITING #12: nam = 'db file sequential read' ela = file No. 12226 = 15 block #= blocks 58183962 = 1 obj #= tim 64793 = 1294827908528268
WAITING #12: nam = 'db file sequential read' ela = 7635 file #= 15 block #= blocks 60499173 = 1 obj #= tim 64793 = 1294827908536613
WAITING #12: nam = 'db file sequential read' ela = 7364 file #= 15 block #= blocks 11270996 = 1 obj #= tim 64793 = 1294827908544203
WAITING #12: nam = 'db file sequential read' ela = 5452 file #= 15 block #= blocks 34622446 = 1 obj #= tim 64793 = 1294827908550475
WAITING #12: nam = 'db file sequential read' ela = 9734 file #= 15 block #= blocks 20913034 = 1 obj #= tim 64793 = 1294827908561029
WAITING #12: nam = 'db file sequential read' ela = 14077 file #= 15 block #= blocks 61679973 = 1 obj #= tim 64793 = 1294827908575440
WAITING #12: nam = 'db file sequential read' ela = 9694 file #= 15 block #= blocks 34550681 = 1 obj #= tim 64793 = 1294827908585311
WAITING #12: nam = 'db file sequential read' ela = 6753 file #= 15 block #= blocks 61007715 = 1 obj #= tim 64793 = 1294827908592228
WAITING #12: nam = 'db file sequential read' ela = 12577 file #= 15 block #= blocks 19769206 = 1 obj #= tim 64793 = 1294827908604943
WAITING #12: nam = 'db file sequential read' ela = file No. 609 = 15 block #= blocks 61589534 = 1 obj #= tim 64793 = 1294827908605735
WAITING #12: nam = 'db file sequential read' ela = 6267 file #= 15 block #= blocks 33356538 = 1 obj #= tim 64793 = 1294827908612148
WAITING #12: nam = 'db file sequential read' ela = 7876 file #= 15 block #= blocks 58184026 = 1 obj #= tim 64793 = 1294827908620164
WAITING #12: nam = 'db file sequential read' ela = file No. 14058 = 15 block #= blocks 32767835 = 1 obj #= tim 80883 = 1294827908634546
WAITING #12: nam = 'db file sequential read' ela = 9798 file #= 15 block #= blocks 58504373 = 1 obj #= tim 80883 = 1294827908644575
WAITING #12: nam = 'db file sequential read' ela = 11081 file #= 15 block #= blocks 11118811 = 1 obj #= tim 80883 = 1294827908655908
WAITING #12: nam = 'db file sequential read' ela = 6249 file #= 15 block #= blocks 58087798 = 1 obj #= tim 80883 = 1294827908662451
WAITING #12: nam = 'db file sequential read' ela = 9513 file #= 15 block #= blocks 33331129 = 1 obj #= tim 80883 = 1294827908672904
WAITING #12: nam = 'db file sequential read' ela = 4648 file #= 15 block #= blocks 60301818 = 1 obj #= tim 80883 = 1294827908677736
WAITING #12: nam = 'db file sequential read' ela = 6147 file #= 15 block #= blocks 20523119 = 1 obj #= tim 80883 = 1294827908684075
WAITING #12: nam = 'db file sequential read' ela = file No. 59531 = 15 block #= blocks 61016570 = 1 obj #= tim 80883 = 1294827908743795

2011-01-12 11:25:08.752
WAITING #12: nam = 'db file sequential read' ela = 8787 file #= 15 block #= blocks 33770842 = 1 obj #= tim 80883 = 1294827908752846
WAITING #12: nam = 'db file sequential read' ela = 9858 file #= 15 block #= blocks 60895354 = 1 obj #= tim 80883 = 1294827908762960
WAITING #12: nam = 'db file sequential read' ela = 11237 file #= 15 block #= blocks 19369506 = 1 obj #= tim 80883 = 1294827908775138
WAITING #12: nam = 'db file sequential read' ela = 5838 file #= 15 block #= blocks 34229712 = 1 obj #= tim 80883 = 1294827908782100
WAITING #12: nam = 'db file sequential read' ela = 6518 file #= 15 block #= blocks 61221772 = 1 obj #= tim 80883 = 1294827908789403
WAITING #12: nam = 'db file sequential read' ela = 9946 file #= 15 block #= blocks 20523183 = 1 obj #= tim 80883 = 1294827908800089
WAITING #12: nam = 'db file sequential read' ela = 16699 file #= 15 block #= blocks 61016634 = 1 obj #= tim 80883 = 1294827908817077
WAITING #12: nam = 'db file sequential read' ela = file No. 15215 = 15 block #= blocks 33770900 = 1 obj #= tim 80883 = 1294827908832934
WAITING #12: nam = 'db file sequential read' ela = 8403 file #= 15 block #= blocks 60895418 = 1 obj #= tim 80883 = 1294827908842317
WAITING #12: nam = 'db file sequential read' ela = 8927 file #= 15 block #= blocks 18950791 = 1 obj #= tim 80883 = 1294827908852190
WAITING #12: nam = 'db file sequential read' ela = 4382 files #= 15 block #= blocks 34493493 = 1 obj #= tim 80883 = 1294827908856821
WAITING #12: nam = 'db file sequential read' ela = 9356 file #= 15 block #= blocks 61324964 = 1 obj #= tim 80883 = 1294827908866337
WAITING #12: nam = 'db file sequential read' ela = 10575 file #= 15 block #= blocks 20883018 = 1 obj #= tim 80883 = 1294827908877102
WAITING #12: nam = 'db file sequential read' ela = 16601 file #= 15 block #= blocks 60502307 = 1 obj #= tim 80883 = 1294827908893926
WAITING #12: nam = 'db file sequential read' ela = 5236 file #= 15 block #= blocks 33331193 = 1 obj #= tim 80883 = 1294827908899387
WAITING #12: nam = 'db file sequential read' ela = 9981 file #= 15 block #= blocks 59830076 = 1 obj #= tim 80883 = 1294827908910427
WAITING #12: nam = 'db file sequential read' ela = 8100 file #= 15 block #= blocks 19767805 = 1 obj #= tim 80883 = 1294827908918751
WAITING #12: nam = 'db file sequential read' ela = 12492 file #= 15 block #= blocks 67133332 = 1 obj #= tim 80883 = 1294827908931732
WAITING #12: nam = 'db file sequential read' ela = 5876 file #= 15 block #= blocks 34229775 = 1 obj #= tim 80883 = 1294827908937859
WAITING #12: nam = 'db file sequential read' ela = 8741 file #= 15 block #= blocks 61408244 = 1 obj #= tim 80883 = 1294827908948439
WAITING #12: nam = 'db file sequential read' ela = 8477 file #= 15 block #= blocks 20523247 = 1 obj #= tim 80883 = 1294827908957099
WAITING #12: nam = 'db file sequential read' ela = 7947 file #= 15 block #= blocks 61016698 = 1 obj #= tim 80883 = 1294827908965210
WAITING #12: nam = 'db file sequential read' ela = 2384 file #= 15 block #= blocks 33331257 = 1 obj #= tim 80883 = 1294827908967773
WAITING #12: nam = 'db file sequential read' ela = 3585 file #= 15 block #= blocks 59571985 = 1 obj #= tim 80883 = 1294827908971564
WAITING #12: nam = 'db file sequential read' ela = 7753 file #= 15 block #= blocks 5099571 = 1 obj #= tim 80883 = 1294827908979647
WAITING #12: nam = 'db file sequential read' ela = 8205 file #= 15 block #= blocks 61408308 = 1 obj #= tim 80883 = 1294827908988200
WAITING #12: nam = 'db file sequential read' ela = 7745 file #= 15 block #= blocks 34229335 = 1 obj #= tim 80883 = 1294827908996129
WAITING #12: nam = 'db file sequential read' ela = file No. 10942 = 15 block #= blocks 61325028 = 1 obj #= tim 80883 = 1294827909007244
WAITING #12: nam = 'db file sequential read' ela = 6247 file #= 15 block #= blocks 20523311 = 1 obj #= tim 80883 = 1294827909013706
WAITING #12: nam = 'db file sequential read' ela = file No. 16188 = 15 block #= blocks 60777362 = 1 obj #= tim 80883 = 1294827909030088
WAITING #12: nam = 'db file sequential read' ela = file No. 16642 = 15 block #= blocks 33528224 = 1 obj #= tim 80883 = 1294827909046971
WAITING #12: nam = 'db file sequential read' ela = file No. 10118 = 15 block #= blocks 60128498 = 1 obj #= tim 80883 = 1294827909057402
WAITING #12: nam = 'db file sequential read' ela = file No. 10747 = 15 block #= blocks 802317 = 1 obj #= tim 64495 = 1294827909069165
WAITING #12: nam = 'db file sequential read' ela = 4795 file number = 15 block #= blocks 33079541 = 1 obj #= tim 64560 = 1294827909074367
WAITING #12: nam = 'db file sequential read' ela = 6822 file #= 15 block #= blocks 20913098 = 1 obj #= tim 64793 = 1294827909081436
WAITING #12: nam = 'db file sequential read' ela = file No. 10932 = 15 block #= blocks 19369570 = 1 obj #= tim 80883 = 1294827909092607

--> > AFTER:
WAITING #23: nam = 'db file sequential read' ela = 16367 file #= 15 block #= blocks 70434065 = 1 obj #= tim 115059 = 1295342220878947
WAITING #23: nam = 'db file sequential read' ela = 1141 file #= 15 block #= blocks 70434066 = 1 obj #= tim 115059 = 1295342220880549
WAITING #23: nam = 'db file sequential read' ela = 456 file #= 15 block #= blocks 70434067 = 1 obj #= tim 115059 = 1295342220881615
WAITING #23: nam = 'db file sequential read' ela = 689 file #= 15 block #= blocks 70434068 = 1 obj #= tim 115059 = 1295342220882617
WAITING #23: nam = 'db file sequential read' ela = 495 file #= 15 block #= blocks 70434069 = 1 obj #= tim 115059 = 1295342220883482
WAITING #23: nam = 'db file sequential read' ela = 419 file #= 15 block #= blocks 70434070 = 1 obj #= tim 115059 = 1295342220884195
WAITING #23: nam = 'db file sequential read' ela = 149 file #= 15 block #= blocks 70434071 = 1 obj #= tim 115059 = 1295342220884629
WAITING #23: nam = 'db file sequential read' ela = 161 file #= 15 block #= blocks 70434072 = 1 obj #= tim 115059 = 1295342220885085
WAITING #23: nam = 'db file sequential read' ela = 146 file #= 15 block #= blocks 70434073 = 1 obj #= tim 115059 = 1295342220885533
WAITING #23: nam = ela 'db file sequential read' = 188 file #= 15 block #= blocks 70434074 = 1 obj #= tim 115059 = 1295342220886026
WAITING #23: nam = 'db file sequential read' ela = 181 file #= 15 block #= blocks 70434075 = 1 obj #= tim 115059 = 1295342220886498
WAITING #23: nam = 'db file sequential read' ela = 303 file #= 15 block #= blocks 70434076 = 1 obj #= tim 115059 = 1295342220887082
WAITING #23: nam = 'db file sequential read' ela = file No. 550 = 15 block #= blocks 70434077 = 1 obj #= tim 115059 = 1295342220887916
WAITING #23: nam = 'db file sequential read' ela = 163 file #= 15 block #= blocks 70434078 = 1 obj #= tim 115059 = 1295342220888402
WAITING #23: nam = 'db file sequential read' ela = 200 file #= 15 block #= blocks 70434079 = 1 obj #= tim 115059 = 1295342220888980
WAITING #23: nam = 'db file sequential read' ela = 134 file #= 15 block #= blocks 70434080 = 1 obj #= tim 115059 = 1295342220889409
WAITING #23: nam = 'db file sequential read' ela = 157 file #= 15 block #= blocks 70434081 = 1 obj #= tim 115059 = 1295342220889850
WAITING #23: nam = 'db file sequential read' ela = 5112 file #= 15 block #= blocks 70434540 = 1 obj #= tim 115059 = 1295342220895272
WAITING #23: nam = 'db file sequential read' ela = 276 file #= 15 block #= blocks 70434082 = 1 obj #= tim 115059 = 1295342220895640

2011-01-18 10:17:00.898
WAITING #23: nam = 'db file sequential read' ela = 2936 file #= 15 block #= blocks 70434084 = 1 obj #= tim 115059 = 1295342220898921
WAITING #23: nam = 'db file sequential read' ela = 1843 file number = 15 block #= blocks 70434085 = 1 obj #= tim 115059 = 1295342220901233
WAITING #23: nam = 'db file sequential read' ela = 452 file #= 15 block #= blocks 70434086 = 1 obj #= tim 115059 = 1295342220902050
WAITING #23: nam = 'db file sequential read' ela = 686 file #= 15 block #= blocks 70434087 = 1 obj #= tim 115059 = 1295342220903031
WAITING #23: nam = 'db file sequential read' ela = 1582 file #= 15 block #= blocks 70434088 = 1 obj #= tim 115059 = 1295342220904933
WAITING #23: nam = 'db file sequential read' ela = 179 file #= 15 block #= blocks 70434089 = 1 obj #= tim 115059 = 1295342220905544
WAITING #23: nam = 'db file sequential read' ela = 426 file #= 15 block #= blocks 70434090 = 1 obj #= tim 115059 = 1295342220906303
WAITING #23: nam = 'db file sequential read' ela = 138 file #= 15 block #= blocks 70434091 = 1 obj #= tim 115059 = 1295342220906723
WAITING #23: nam = 'db file sequential read' ela = 3004 file #= 15 block #= blocks 70434092 = 1 obj #= tim 115059 = 1295342220910053
WAITING #23: nam = 'db file sequential read' ela = 331 file #= 15 block #= blocks 70434093 = 1 obj #= tim 115059 = 1295342220910765
WAITING #23: nam = 'db file sequential read' ela = 148 file #= 15 block #= blocks 70434094 = 1 obj #= tim 115059 = 1295342220911236
WAITING #23: nam = 'db file sequential read' ela = 296 file #= 15 block #= blocks 70434095 = 1 obj #= tim 115059 = 1295342220911836
WAITING #23: nam = 'db file sequential read' ela = 441 file #= 15 block #= blocks 70434096 = 1 obj #= tim 115059 = 1295342220912581
WAITING #23: nam = 'db file sequential read' ela = 157 file #= 15 block #= blocks 70434097 = 1 obj #= tim 115059 = 1295342220913038
WAITING #23: nam = 'db file sequential read' ela = 281 file #= 15 block #= blocks 70434098 = 1 obj #= tim 115059 = 1295342220913603
WAITING #23: nam = 'db file sequential read' ela = file No. 150 = 15 block #= blocks 70434099 = 1 obj #= tim 115059 = 1295342220914048
WAITING #23: nam = 'db file sequential read' ela = 143 file #= 15 block #= blocks 70434100 = 1 obj #= tim 115059 = 1295342220914498
WAITING #23: nam = 'db file sequential read' ela = 384 file #= 15 block #= blocks 70434101 = 1 obj #= tim 115059 = 1295342220916907
WAITING #23: nam = 'db file sequential read' ela = file No. 164 = 15 block #= blocks 70434102 = 1 obj #= tim 115059 = 1295342220917458
WAITING #23: nam = 'db file sequential read' ela = 218 file #= 15 block #= blocks 70434103 = 1 obj #= tim 115059 = 1295342220917962
WAITING #23: nam = 'db file sequential read' ela = file No. 450 = 15 block #= blocks 70434104 = 1 obj #= tim 115059 = 1295342220918698
WAITING #23: nam = 'db file sequential read' ela = file No. 164 = 15 block #= blocks 70434105 = 1 obj #= tim 115059 = 1295342220919159
WAITING #23: nam = 'db file sequential read' ela = 136 file #= 15 block #= blocks 70434106 = 1 obj #= tim 115059 = 1295342220919598
WAITING #23: nam = 'db file sequential read' ela = 143 file #= 15 block #= blocks 70434107 = 1 obj #= tim 115059 = 1295342220920041
WAITING #23: nam = 'db file sequential read' ela = 3091 file #= 15 block #= blocks 70434108 = 1 obj #= tim 115059 = 1295342220925409
user12196647 wrote:
Hemant, Jonathan - thanks for the comprehensive replies. To summarize:

It's the 11.1 (11.1.0.7) database on 64-bit Linux. No compression is used for everything, all the blocks are 16 k tablespaces are SAMS created with attributes EXTENT MANAGEMENT LOCAL AUTOALLOCATE SEGMENT SPACE MANAGEMENT AUTO BIGFILE tablespaces (separate for tables and separate for the index tablespace). I do not have to rebuild the indexes of PK, but abandoned all indexes, and then recreated the KP (but it's okay - reconstruction is still that let down & create, isn't it?).

Traces were made during the pl/sql loop forall was actually insert. Each pl/sql forall loop inserts 100 lines "at once" (we use fetch bulk collect limit 100), but the loading process inserts a few million records (pl/sql forall loop is closed :)). I stuck that part of traces - wait events for 100 (a set of) 'before' 100 'after' inserts and inserts. Wait for events to another inserts look exacly the same - always blocks 'random' in 'before the index recreate' inserts and inserts almost ordained blocks in "after the index recreate." The objects_ids were certainly indexes.

I think that the explanation of Hemant is correct. The point is, my structure of the index is of (X, Y, DATE), where X and are 99% repeating at each loading data, values and DATE is increased by one for each data load. Because I'm always insert ordered by PK, for loading a new DATE, I visit each index leaf block, in order, as in the analysis of comprehensive index. Because I'm inserted in each block sheet in every load, I have many index block splits. Which caused my pads of sheets to be physically non-contiguous after awhile. Reconstruction has been my healing...

You got your answer before I had time to finish a model of your data set - but I think you're description is fairly accurate.
A few thoughts if:

WAITING #12: nam = 'db file sequential read' ela = file No. 10747 = 15 block #= blocks 802317 = 1 obj #= tim 64495 = 1294827909069165
WAITING #12: nam = 'db file sequential read' ela = 4795 file number = 15 block #= blocks 33079541 = 1 obj #= tim 64560 = 1294827909074367
WAITING #12: nam = 'db file sequential read' ela = 6822 file #= 15 block #= blocks 20913098 = 1 obj #= tim 64793 = 1294827909081436
WAITING #12: nam = 'db file sequential read' ela = file No. 10932 = 15 block #= blocks 19369570 = 1 obj #= tim 80883 = 1294827909092607

Unless you missed a bit when your trace file copying, the index with the id of the object 64495 has not subject to drive the way readings which the other clues were. It would be nice to know why. There are two "obvious" possibilities - (a) it has been very well buffered or (b) there is an index where almost all the entries are zero, so it is rarely changed. Because it has the object id lowest of all indexes, it is possible that it is the primary key index (but I don't because I tend to create the primary key of a table before I create any index) and if this is correct your waste of time was not on the primary key index, and perhaps he tends to be very well buffered the nature of popular queries.

Changes in performance when inserting millions of lines tend to be non-linear as the number of indexes grow.

As you insert data in the primary key order draw you maximum benefits caching for insertions in the KP index. And since you insert a very large number of lines - the order of 0.5% - 1% of the current lines, in light of your comment 'millions' - you're likely to insert two or three lines in each block of the pharmacokinetics of the index (by the way it must compress on the first two columns)) allowing Oracle to optimize its work in several ways.

But for the other clues you are probably very randomly jump to insert rows, and this led to two different effects:
It is perfectly possible that almost all of your performance gain comes to drop the three indexes, and only a relatively small fraction come to rebuild the primary key.

One final thought of block shares. I think that you have found an advantage any readahead (non-Oracle) when the index blocks are classified physically, if you have a trade-off between how many times you rebuild to this advantage and to find a time during which you can afford the resources to rebuild. If you want the best compromise (a) don't forget the compression option - it seems appropriate, (b) consider the benefits of partitioning range date - it seems very appropriate in your case, and (c) by varying the PCTFREE when you rebuild the index you can assign the number of insert cycles before the effects of the splits of block of sheets have a significant impact on the randomness of the IO.

I have an idea-if I changed the index structure to (DATE, X, Y) then I would always insert in block leaves more right side, I'd have 90-10 splits instead of 50 / 50 splits and leafs would be physically contiguous, so any necessary new buildings - am I right?

You cannot change the order of index column until you check the use of the index. If the most important and most frequent queries are "select table where colx = X and coly = O and date_col between A and B", you must index this round way. (In fact, you can look at the possibility of using a range partiitoned index organized table for data).

Concerning
Jonathan Lewis

How to get the index of the list column Mult box

Hi all

I need little help. Please help me.

Is there is no property to dynamically change the index position of line "Multi column list box"?

I want to change the index location when running as below.

He called the top left cell Visible. There is no as many properties.

Change the order of selection when the index is created

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