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The problem is that the tool is using the LSN returned by pg_create_logical_replication_slot() as recovery_target_lsn. This LSN is ahead of the current WAL position and the recovery waits until the publisher writes a WAL record to reach the target and ends the recovery. On idle systems, this wait time is unpredictable and could lead to failure in promoting the subscriber. To avoid that, insert a harmless WAL record. Reported-by: Alexander Lakhin and Tom Lane Diagnosed-by: Hayato Kuroda Author: Euler Taveira Reviewed-by: Hayato Kuroda, Amit Kapila Backpatch-through: 17 Discussion: https://postgr.es/m/2377319.1719766794%40sss.pgh.pa.us Discussion: https://postgr.es/m/CA+TgmoYcY+Wb67NAwaHT7MvxCSeV86oSc+va9hHKaasE42ukyw@mail.gmail.com
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/17/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/17/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.