Re: checkpoint over 15 minutes?

These messages in given alert log were full checkpoints caused by log switch.

Incremental checkpoint is an ongoing process, there really isn't a number of them - in essence it's just CKPT process checking how far DBWR is with it's writings and updating this info in controlfiles every 3 seconds. *Incremental* checkpoint entries in alert log are just status messages on checkpoint progress as far as I know, not individual checkpoint completion messages.

Tanel.

----- Original Message ----- From: "Alex Gorbachev" <gorbyx@xxxxxxxxx>
To: <tanel.poder.003@xxxxxxx>
Cc: <exriscer@xxxxxxxxx>; <oracle-l@xxxxxxxxxxxxx>
Sent: Wednesday, May 24, 2006 7:50 PM
Subject: Re: checkpoint over 15 minutes?


Well, it's also a function of fast_start_mttr_target so reducing it
should lead to more frequent and short checkpoints. On the other hand,
it might stress IO subsystem more and give actually an opposite
result.


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