284925508a
heapam_scan_analyze_next_tuple() doesn't distinguish between dead and recently dead tuples when counting them, so it doesn't need OldestXmin. GetOldestNonRemovableTransactionId() isn't free, so removing it is a win. Looking at other table AMs implementing table_scan_analyze_next_tuple(), we couldn't find one using OldestXmin either, so remove it from the callback. Author: Melanie Plageman <melanieplageman@gmail.com> Suggested-by: Kirill Reshke <reshkekirill@gmail.com> Reviewed-by: Kirill Reshke <reshkekirill@gmail.com> Reviewed-by: Andres Freund <andres@anarazel.de> Reviewed-by: Chao Li <li.evan.chao@gmail.com> Discussion: https://postgr.es/m/CALdSSPjvhGXihT_9f-GJabYU%3D_PjrFDUxYaURuTbfLyQM6TErg%40mail.gmail.com |
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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.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.