On Thu, Jun 18, 2020 at 6:39 AM Simon Riggs <si...@2ndquadrant.com> wrote: > That doesn't appear to be very graceful. Perhaps objections could be assuaged > by having a smoother transition and perhaps not even a full barrier, > initially.
Yeah, it's not ideal, though still better than what we have now. What do you mean by "a smoother transition and perhaps not even a full barrier"? I think if you want to switch the primary to another machine and make the old primary into a standby, you really need to arrest WAL writes completely. It would be better to make existing write transactions ERROR rather than FATAL, but there are some very difficult cases there, so I would like to leave that as a possible later improvement. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
