Oracle Exadata - Automatic Index

Hi Experts,
I was told that Oracle Exadata can create index on the fly automatically for the required columns when it seems some queries performing poor, can you please clarify if its true? if so what kind of configuration is required to do so?
Appreciate any more details!
No, the database indexe on tables are not created automatically.
There is a difference between database index (persist) and exadata storage index (do not persist across reboot) which are created at the storage layer. For poor performing query you should check whether smart scan is working.
HTH,
Pradeep

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:"SYS_B_31",
:"SYS_B_32",
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:"SYS_B_34",
:"SYS_B_35",
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Why is Oracle 9i ignoring index hints?
I came across the same problem some months ago, when we migrated one database from 8i to 9i. After that an INDEX_ASC hint was suddenly ignored. We used an index + and INDEX_ASC hint to sort a hierarchical query.
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Any ideas?
Kai

Kai,
Remember a hint is just that, a hint to the optimizer, it does not override the execution plan created by the optimizer. Possibilities are that the statistics in the database are out of date, which will affect the Cost based optimizer. Indexes on views are tricky as they would rely on the indexes on the underlying tables.
Few AskTom links which may help:
http://asktom.oracle.com/pls/ask/f?p=4950:8:1705043::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:313416745628,%7Bhint%7D%20and%20%7Bindex%7D
http://asktom.oracle.com/pls/ask/f?p=4950:8:1705043::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:641623836427,%7Bhint%7D%20and%20%7Bindex%7D
http://asktom.oracle.com/pls/ask/f?p=4950:8:1705043::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:1197786003246,%7Bhint%7D%20and%20%7Bindex%7D
Sometimes the full scan can be quicker, than the index depending on the query.
Regds
Dave

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main
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