aea5d29836
Tom Lane observed buildfarm failures caused by the select_parallel regression test trying to launch new parallel queries before the worker slots used by the previous ones were freed. Try to fix this by having the postmaster free the worker slots before it sends the SIGUSR1 notifications to the registering process. This doesn't completely eliminate the possibility that the user backend might (correctly) observe the worker as dead before the slot is free, but I believe it should make the window significantly narrower. Patch by me, per complaint from Tom Lane. Reviewed by Amit Kapila. Discussion: http://postgr.es/m/30673.1487310734@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. 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. 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/.