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The command used in the documentation to retrieve the value of the runtime-computed GUC shared_memory_size_in_huge_pages would also show to the user all the log messages generated by the postmaster before and after printing the wanted value. This can be confusing, as the wanted result could be masked with a lot of noise. One way to avoid those log messages is to use something like "-c log_min_messages=fatal" in the command (my idea, but that's not common knowledge). Rather than mentioning this option, suffix the command with a redirection of stderr to /dev/null, which is the stream location where the logs show up. This is enough to show only the GUC value to the user when copy-pasting the command. Reported-by: Magnus Hagander Author: Nathan Bossart Discussion: https://postgr.es/m/20220314173417.GA1020555@nathanxps13
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/.