Re: Delete followed by Select Count(1) - SLOW

From: yong huang <yong321_at_yahoo.com>
Date: Fri, 17 Aug 2001 13:21:33 -0700
Message-ID: <F001.0036FCD4.20010817133622@fatcity.com>

I remember in slightly older versions of Oracle, delayed_logging_block_cleanouts is by default true, so redo won't be written immediately at block cleanout. Correct me if I'm wrong.

Yong Huang
yong321_at_yahoo.com

Jonathan Lewis wrote:

bear in mind that a scan after deleting 100,000 rows would probably be doing a lot of
delayed block cleanout - resulting in plenty of redo log, and possibly a lot of dbwr activity.

Jonathan Lewis

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Author: yong huang
  INET: yong321_at_yahoo.com

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