Logical replication and physical standby failover

Replication lag is the delay between the time when data is written to the primary database and the time when it is replicated to the standby

Logical replication and physical standby failover True if this is a temporary replication slot Temporary slots are not saved The oldest transaction that this slot needs the database to retain

Replication lag is the delay between the time when data is written to the primary database and the time when it is replicated to the standby

nemef 1200 slot Oldest replication slot lag: lagging size of the most lagging replica in terms of WAL data received You can run the following SQL statement

High replica_lag means that the replica can't apply replication changes fast enough The total lag can be observed via replica_byte_lag metric, which has labels

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Oldest query start time pg_waiting_backends, gauge, wait_type