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dirty buffers and changed data [message #296592] Mon, 28 January 2008 06:22 Go to next message
varu123
Messages: 754
Registered: October 2007
Senior Member
I have a small doubt about data buffer cache.
What ever DML we do ,that DML is performed at data buffer cache.
ANd the result of DML is what we call as dirty buffers.

Now redolog buffer cache also contains changed data.
So is the server process that puts a copy of that changed data from that data buffer cache to redo log buffer cache or something else happens?
Re: dirty buffers and changed data [message #296604 is a reply to message #296592] Mon, 28 January 2008 06:42 Go to previous message
Michel Cadot
Messages: 64133
Registered: March 2007
Location: Nanterre, France, http://...
Senior Member
Account Moderator
Quote:
So is the server process that puts a copy of that changed data from that data buffer cache to redo log buffer cache or something else happens?

Something else happens.
Server process writes modified buffer in buffer cache
Server process writes change vector in log buffer.

All is in Database Concepts.

Regards
Michel
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