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If a smart shutdown occurs just as a child is starting up, and the child subsequently becomes a walsender, there is a race condition: the postmaster might count the exstant backends, determine that there is one normal backend, and wait for it to die off. Had the walsender transition already occurred before the postmaster counted, it would have proceeded with the shutdown. To fix this, have each child that transforms into a walsender kick the postmaster just after doing so, so that the state machine is certain to advance. Fujii Masao
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: http://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. 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/.