RE: Data Guard Apply lag

Can't recall the exact parameter off the top of my head, but there is one that can be set to intentionally force a delay on the application of logs to the standby. It is done to give you a chance to prevent logical corruption/user error (e.g. accidental drop/delete) from being propagated to the standby if you desire to do so. You might want to look up the parameter and confirm if it's set or not. If that's not the cause, then check the wait events for the log apply session and see where it's spending it's time.

Regards,
Brandon  

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