http://muratkar.blogspot.ro/2011/11/avoiding-ora-01555-errors-in-oracle.html
increase undo_retention on the primary db
Video on monitoring (a single instance) DataGuard Standby for a RAC
(2-node) Cluster
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I've just uploaded a new video on monitoring DataGuard where the Standby
is a Single Instance environment for a 2-node RAC Cluster.
The script used in ...
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