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We've heard occasional reports of backend launch failing because pgwin32_ReserveSharedMemoryRegion() fails, indicating that something has already used that address space in the child process. It's not very clear what, given that we disable ASLR in Windows builds, but suspicion falls on antivirus products. It'd be better if we didn't have to disable ASLR, anyway. So let's try to ameliorate the problem by retrying the process launch after such a failure, up to 100 times. Patch by me, based on previous work by Amit Kapila and others. This is a longstanding issue, so back-patch to all supported branches. Discussion: https://postgr.es/m/CAA4eK1+R6hSx6t_yvwtx+NRzneVp+MRqXAdGJZChcau8Uij-8g@mail.gmail.com
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/.