'PostgreSQL — measure logical replication lag

Is there a way to measure logical replication lag in PostgreSQL?

postgresqldatabase-replicationpostgresql-11


Solution 1:[1]

You can check pg_catalog.pg_replication_slots. Run this code on the master (publisher) server:

SELECT 
    slot_name,
    confirmed_flush_lsn, 
    pg_current_wal_lsn(), 
    (pg_current_wal_lsn() - confirmed_flush_lsn) AS lsn_distance
FROM pg_replication_slots;

lsn_distance is the measure of the replication lag.

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Source: Stack Overflow

Solution Source
Solution 1 Max Malysh

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