Can we change primary standby Undo retention time

We set up a standby DB,.

can we undo retention target reduce the primary standby

What are the things to consider before.

hope because it is a watch - what is the significance of the undo retention target

Yes. Retention of cancellation can be reduced. The wait has no active SELECT statements (unless it is Active Data Guard, where you READ ONLY in managed recovery mode), so that consistent readings are reduced to a minimum on the day before. In addition, the phase to apply is often faster that it again is committed to primary school because there is no request pending on a user to press the "Save" button. Repeatedly, the cancellation must not be kept longer on the day before.

That being said, why change this setting on the eve? If it is set to match the primary school, there is no problem. And if you need to switchover to the standby, a lower undo retention can cause problems with the application.

See you soon,.
Brian

Tags: Database

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