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In parallel mode, pg_dump tries to order the table-data-dumping jobs with the largest tables first. However, it was only consulting the pg_class.relpages value to determine table size. This ignores TOAST data, and so we could make poor scheduling decisions in cases where some large tables are mostly TOASTed data while others have very little. To fix, add in the relpages value for the TOAST table as well. This patch also fixes a potential integer-overflow issue that could result in poor scheduling on machines where off_t is only 32 bits wide. Such platforms are probably extinct in the wild, but we do still nominally support them, so repair. Per complaint from Hans Buschmann. Discussion: https://postgr.es/m/7d7eb6128f40401d81b3b7a898b6b4de@W2012-02.nidsa.loc
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/.