Simon Riggs <si...@2ndquadrant.com> writes: > Patch adds a keepalive message to ensure max_standby_delay is useful.
The proposed placement of the keepalive-send is about the worst it could possibly be. It needs to be done right before pq_flush to ensure minimum transfer delay. Otherwise any attempt to measure clock skew using the timestamp will be seriously off. Where you've placed it guarantees maximum delay not minimum. I'm also extremely dubious that it's a good idea to set recoveryLastXTime from this. Using both that and the timestamps from the wal log flies in the face of everything I remember about control theory. We should be doing only one or only the other, I think. regards, tom lane -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers