21fb39cb07
Formerly we skipped this in bootstrap/check mode and in single-user mode. That's bad in check mode because it may allow accepting a value of max_connections that doesn't actually work: on platforms where semaphores consume file descriptors, there may not be enough free FDs left over to satisfy fd.c, causing postmaster start to fail. It's also not great in single-user mode, because fd.c will operate with just the minimum allowable value of max_safe_fds, resulting in excess file open/close overhead if anything moderately complicated is done in single-user mode. (There may be some penalty for bootstrap mode too, though probably not much.) Discussion: https://postgr.es/m/2081982.1734393311@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.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.