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The logical replication launcher may start apply workers during an upgrade. This could be the cause of corruptions on a new cluster if these are able to apply changes before the physical files are copied over to the new cluster. The chance of being able to do so is small as pg_upgrade uses its own port and unix domain directory (the latter is customizable with --socketdir), but just preventing the launcher to start is safer at the end, because we are then sure that no changes will be applied. Like 29d0a77fa660 for max_slot_wal_keep_size, this is only set when a cluster uses v17 or newer. Author: Vignesh C Discussion: https://postgr.es/m/CALDaNm2g9ZKf=y8X6z6MsLCuh8WwU-=Q6pLj35NFi2M5BZNS_A@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. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.