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StartupXLOG and ShutdownXLOG no longer need to be critical sections, because in all contexts where they are invoked, elog(ERROR) would be translated to elog(FATAL) anyway. (One change in bgwriter.c is needed to make this true: set ExitOnAnyError before trying to exit. This is a good fix anyway since the existing code would have gone into an infinite loop on elog(ERROR) during shutdown.) That avoids a misleading report of PANIC during semi-orderly failures. Modify the postmaster to include the startup process in the set of processes that get SIGTERM when a fast shutdown is requested, and also fix it to not try to restart the bgwriter if the bgwriter fails while trying to write the shutdown checkpoint. Net result is that "pg_ctl stop -m fast" does something reasonable for a system in warm standby mode, and so should Unix system shutdown (ie, universal SIGTERM). Per gripe from Stephen Harris and some corner-case testing of my own.
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 including some of the more common listed below: C++ - http://thaiopensource.org/development/libpqxx/ JDBC - http://jdbc.postgresql.org ODBC - http://odbc.postgresql.org Perl - http://search.cpan.org/~dbdpg/ PHP - http://www.php.net Python - http://www.initd.org/ Ruby - http://ruby.scripting.ca/postgres/ Other language binding are available from a variety of contributing parties. PostgreSQL also has a great number of procedural languages available, a short but not complete list is below: PL/pgSQL - included in PostgreSQL source distribution PL/Perl - included in PostgreSQL source distribution PL/PHP - http://projects.commandprompt.com/projects/public/plphp PL/Python - included in PostgreSQL source distribution PL/Java - http://gborg.postgresql.org/project/pljava/projdisplay.php PL/Tcl - included in PostgreSQL source distribution 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. Changes between all PostgreSQL releases are recorded in the file HISTORY. 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 http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.