On 1/6/22, 11:25 PM, "Jeff Davis" <pg...@j-davis.com> wrote: > On Wed, 2022-01-05 at 23:59 -0800, SATYANARAYANA NARLAPURAM wrote: >> I would like to propose a GUC send_Wal_after_quorum_committed which >> when set to ON, walsenders corresponds to async standbys and logical >> replication workers wait until the LSN is quorum committed on the >> primary before sending it to the standby. This not only simplifies >> the post failover steps but avoids unnecessary downtime for the async >> replicas. Thoughts? > > Do we need a GUC? Or should we just always require that sync rep is > satisfied before sending to async replicas? > > It feels like the sync quorum should always be ahead of the async > replicas. Unless I'm missing a use case, or there is some kind of > performance gotcha.
I don't have a strong opinion on whether there needs to be a GUC, but +1 for the ability to enforce sync quorum before sending WAL to async standbys. I think that would be a reasonable default behavior. Nathan
