Hello PostgreSQL Community!
I configured logical replication for
PostgreSQL 10.4 on 2 machines, set wal_level to logical, created a publication
on master node and created a subscription on standby node according to
the PostgreSQL documentation.
Could you please suggest an approach
for replication state monitoring.
According to my experience the monitoring
of pg_stat_subscription and pg_publication, pg_replication_slots
unfortunately is not enough for this aim. Moreover standby database
does not prohibit write operations by default and it can lead to some inconsistency
between these databases.
For example a chain of queries as
SELECT pg_is_is_recovery(),
SELECT * FROM pg_stat_replication
and
SELECT * FROM pg_stat_wal_receiver
provide insight into replication state
for hot_standby replication.
So is there a reliable way of replication
state monitoring for logical replication?
Best regards,
Andrei Yahorau
