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Since 11, it is possible to use a non-superuser role when using an online source cluster with pg_rewind as long as the role has proper permissions to execute on the source all the functions used by pg_rewind, and the documentation stated that a superuser is necessary. Let's add at the same time all the details needed to create such a role. A second confusion which comes a lot from users is that it is necessary to issue a checkpoint on a freshly-promoted standby so as its control file has up-to-date timeline information which is used by pg_rewind to validate the operation. Let's document that properly. This is back-patched down to 9.5 where pg_rewind has been introduced. Author: Michael Paquier Reviewed-by: Magnus Hagander Discussion: https://postgr.es/m/CABUevEz5bpvbwVsYCaSMV80CBZ5-82nkMzbb+Bu=h1m=rLdn=g@mail.gmail.com Backpatch-through: 9.5 |
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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/.