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When trying to use a high number of jobs, vacuumdb has only checked for a maximum number of jobs used, causing confusing failures when running out of file descriptors when the jobs open connections to Postgres. This commit changes the error handling so as we do not check anymore for a maximum number of allowed jobs when parsing the option value with FD_SETSIZE, but check instead if a file descriptor is within the supported range when opening the connections for the jobs so as this is detected at the earliest time possible. Also, improve the error message to give a hint about the number of jobs recommended, using a wording given by the reviewers of the patch. Reported-by: Andres Freund Author: Michael Paquier Reviewed-by: Andres Freund, Álvaro Herrera, Tom Lane Discussion: https://postgr.es/m/20190818001858.ho3ev4z57fqhs7a5@alap3.anarazel.de Backpatch-through: 9.5 |
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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/.