last week, I stumbled over this in TID 3426981

- Inactive replicas need to be excluded from the 6 month difference
check when computing synch window (Bug 827146)
- Inactive replicas should be excluded when calculating the send\receive
max ring deltas (Bug 827145)

What is an 'Inactive Replica'?

havent found anything in the documentation on it. Would be really cool,
if there is a new replica type that is simply 'freezed' on one point in
time. Useful for Quick Disaster Recovery functions....