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Select statement generates Redo [message #534519] Wed, 07 December 2011 01:10 Go to next message
abhi_sri
Messages: 20
Registered: September 2010
Location: India
Junior Member
Hi,

Whenever any transaction happen in database redo has generated for this transaction. This redo will be helpful if in future any kind of recovery required.
Now my question is- Do select statement treat as a transaction as it doesn't modify any thing in database.
And If select statement should not be a transaction, there should not be any redo generation for select statement.

So is select statement generate redo? If yes then Why ?

Thanks in advance for all your favours.

Regards
Abhishek
Re: Select statement generates Redo [message #534525 is a reply to message #534519] Wed, 07 December 2011 01:21 Go to previous message
Michel Cadot
Messages: 68641
Registered: March 2007
Location: Nanterre, France, http://...
Senior Member
Account Moderator
It might, search for "delayed block cleanout" (for instance on AskTom).

Regards
Michel
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