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?
tail_n_mail and look for relevant errors (logical,
logical replication worker ... exited with ..., ERROR)
Best regards,
Andrei Yahorau
--
Achilleas Mantzios
IT DEV Lead
IT DEPT
Dynacom Tankers Mgmt
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