Kevin Grittner schrieb am 29.07.2015 um 23:10:
> No, it means that if the primary is hit by a meteor and you promote
> the standby, the data will not have been lost. The time between
> the successful return of the commit on the primary and the time at
> which the change becomes visible on the standby is normally quite
> small; you may have trouble running into a case where you notice
> it, but it can happen.
It's actually not that hard to run into. We encountered this when we were running
unit tests against a master/slave setup with pgPool:
http://postgresql.nabble.com/Synchronous-replication-pgPool-not-all-transactions-immediately-visible-on-standby-tp5820275.html
Regards
Thomas