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POSIX shm_open() can sleep for a long time and fail spuriously because of contention on an internal lock file on Solaris (and presumably illumos). Commit 389869af fixed the main problem with this, namely that we could crash, but it's now clear that "posix" is not a good default. Therefore, choose "sysv" at initdb time on Solaris and illumos. Other choices are still available by editing the postgresql.conf file. Back-patch only to 15, because contention is much less likely further back, and it doesn't seem like a good idea to change this in released branches. This should clear up the failures on build farm animal margay. Discussion: https://postgr.es/m/CA%2BhUKGKqKrCV5xKWfh9rnm%3Do%3DDwZLTLtnsj_XpUi9g5%3DV%2B9oyg%40mail.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/.