Hi there,
>From documentation https://www.postgresql.org/docs/10/runtime-config-wal.html standby behavior with setting synchronous_commit = remote_apply is not obvious. I think we should explain this case. Am I correct that master always sync COMMIT, except 'off' and regardless of whether standby is connected or not? But I am not sure, when standby will sync replayed COMMIT? Does it depend on synchronous_commit value in standby config? For example, if synchronous_commit in standbys config is “on”, master synchronous_standby_names is non-empty, are the following details correct? synchronous_commit = on master sync standby sync synchronous_commit = remote_apply master sync standby ??? synchronous_commit = remote_write master sync standby no sync synchronous_commit = local master sync standby no recv synchronous_commit = off master sync standby no recv -- Konstantin Evteev
