Instance Recovery Question

From: <corcorank_at_my-deja.com>
Date: 1999/09/27
Message-ID: <7snko2$55h$1@nnrp1.deja.com>#1/1

My qustion is this. As I understand it the redo log buffers are flushed when they fill or when a commit is issued. If the machine fails and restarts how does Oracle ensure that DBWR hasn't written changed datafile blocks to their respective datafiles? Does DBWR somehow ignore updated blocks that haven't had their log updates externalised or is there some other process at work?

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Before you buy. Received on Mon Sep 27 1999 - 00:00:00 CDT