Re: Which method is more efficient

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Thursday, May 29, 2003 3:14 AM

> 1. to totally eliminate redo, load your staging records into a global temp
table. it has absolutely no redo and is very fast.

Hi

The above is not quite true. Global temp tables *do* generate redo (albeit indirectly) and potentially quite a bit of it. The point to make here is that changes to GTT generate undo and this undo makes changes to undo segments and these changes subsequently generate redo. So depending on the type of DML (eg. deletes) and the volume of changes, you can end up generating quite a bit of the redo.

Not as much as a non-GTT but enough to certainly invalidate the above statement.

Cheers

Richard Foote

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