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Traditionally, "pg_ctl start -w" has waited for the server to become ready to accept connections by attempting a connection once per second. That has the major problem that connection issues (for instance, a kernel packet filter blocking traffic) can't be reliably told apart from server startup issues, and the minor problem that if server startup isn't quick, we accumulate "the database system is starting up" spam in the server log. We've hacked around many of the possible connection issues, but it resulted in ugly and complicated code in pg_ctl.c. In commit |
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README.git |
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/.