> On Apr 30, 2024, at 8:20 AM, Ron Johnson <ronljohnsonjr@gmail.com> wrote:
>
> ZERO downtime is -- to my knowledge -- impossible with master-slave replication. There will always be some seconds
oflag while the secondary-that-was is promoted to new-primary, and the applications that were forcibly disconnected
fromthe old primary are connected to the new-primary.
>
> Heck, even in a master-master DB cluster, any connections on the master that dies will be down until they can connect
tothe other master.
This is true. However, with a secondary that is up to date, and applications accessing through pgbouncer, client
connectionsto pgbouncer are not broken, and pgbouncer connections to postgres can be reestablished quickly enough that
usersonly observe a slightly slow response.
