On Fri, Feb 14, 2014 at 12:05 PM, Andres Freund <and...@2ndquadrant.com> wrote: > There's no reason not > to ask for a ping when we're writing.
Is there a reason to ask for a ping? The point of keepalives is to ensure there's some traffic on idle connections so that if the connection is dead it doesn't linger forever and so that any on-demand links (or more recently NAT routers or stateful firewalls) don't time out and disconnect and have to reconnect (or more recently just fail outright). By analogy TCP doesn't send any keepalives if there is any traffic on the link. On the other hand I happen to know (the hard way) that typical PPPoE routers *do* send LCP pings even when the link is busy so there's precedent for either behaviour. I'm guess it comes down to why you want the keepalives. -- greg -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
