why does block cleanout incur redo?

From: Ryan <rgaffuri_at_cox.net>
Date: Wed, 06 Aug 2003 18:34:29 -0800
Message-ID: <F001.005C9508.20030806183429@fatcity.com>

My understanding of block cleanout is that oracle is flushing transaction information of already committed transactions from the buffer cache. This can happen in selects, when 10% of the buffer cache is filled with 'lists' if blocks involved in transactions, or with dml.

i dont understand why this incurs redo? your just flushing blocks that are no longer needed?

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Author: Ryan
  INET: rgaffuri_at_cox.net

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