11g dataguard, v$ view to monitor rate of redo transfer to standby?

Hello,
Which v$ views can I query to monitor the speed/rate of archivelogs transfer from primary to standby? Thank you in advance.

V$standby_apply_snapshot - redo apply rate in KB/second
v$dataguard_stats - info about standby background process
v$recovery_progress - information about the redo.
Hopes this helps!
Thanks

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