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Commit 4656e3d66 replaced the "#define CLOBBER_CACHE_ALWAYS" testing mechanism with a GUC, which has been a great help for doing cache-clobber testing in more efficient ways; but there is a gap in the implementation. The only way to do cache-clobber testing during an initdb run is to use the old method with #define, because one can't set the GUC from outside. Improve this by adding a switch to initdb for the purpose. (Perhaps someday we should let initdb pass through arbitrary "-c NAME=VALUE" switches. Quoting difficulties dissuaded me from attempting that right now, though.) Back-patch to v14 where 4656e3d66 came in. Discussion: https://postgr.es/m/1582507.1624227029@sss.pgh.pa.us
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/.