On Tue, 2009-12-01 at 20:26 +0200, Heikki Linnakangas wrote: > Simon Riggs wrote: > > commit 02c3eadb766201db084b668daa271db4a900adc9 > > Author: Simon Riggs <sri...@ebony.(none)> > > Date: Sat Nov 28 06:23:33 2009 +0000 > > > > Added wal_standby_info GUC to turn RM_STANDBY_ID messages on/off. > > Various comments added also. > > > > This patch makes it unsafe to start hot standby mode from a shutdown > checkpoint, because we don't know if wal_standby_info was enabled in the > master.
> I still don't think we need the GUC. If that's a good plan we can remove it in late beta. Let's keep it there for now. > But for future-proofing, perhaps we > should add a flag to shutdown checkpoint records, indicating whether > it's safe to start hot standby from it. That way, if we decide to add a > GUC like that at a later stage, we don't need to change the on-disk format. OK, I understand this now. Taken me a while, even though obvious now I see. -- Simon Riggs www.2ndQuadrant.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
