On Thu, Aug 6, 2020 at 7:02 AM Sreejith P <sreejith@lifetrenz.com> wrote:
> IN SYNC mode of replication what would be the impact on Master DB server in terms of over all performance ?
The pg_stat_replication columns write_lag, flush_lag and replay_lag
are designed tell you how long to expect commits to take for
synchronous standbys, based on recent history, if synchronous_commit
it set to remote_write, on or remote_apply respectively. Those times
tell you about commit latency, which limits sequential commit rate for
each session.