NOLOGGING 應用場景

NOLOGGING Wrap-up
The operations that may be performed in a NOLOGGING mode are as follows:

特別注意，在非歸檔下，Create表和索引都不會產生大量日誌。

You would not see the differences
in redo size in a NOARCHIVELOG mode database as the index CREATE and REBUILD operations are not logged in
NOARCHIVELOG mode.

If you test this on a NOARCHIVELOG-mode database, The CREATE TABLE will not be logged, with the exception of the data dictionary modifications, in a NOARCHIVELOG-mode database.

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• Index creations and ALTERs (rebuilds).
• Bulk INSERTs into a table using a direct-path INSERT such as that available via the
/*+ APPEND */ hint or SQL*Loader direct-path loads. The table data will not generate redo, but all index modifications will (the indexes on this nonlogged table will generate redo!).
• LOB operations (updates to large objects do not have to be logged).
• Table creations via CREATE TABLE AS SELECT.
• Various ALTER TABLE operations such as MOVE and SPLIT.