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Previously, when lazy_scan_noprune() was called and returned true, we would update the FSM immediately if the relation had no indexes or if the page contained no dead items. On the other hand, when lazy_scan_prune() was called, we would update the FSM if either of those things was true or if index vacuuming was disabled. Eliminate that behavioral difference by considering vacrel->do_index_vacuuming in both cases. Also, make lazy_scan_heap() responsible for deciding whether to update the FSM, instead of doing it inside lazy_scan_noprune(). This is more consistent with the lazy_scan_prune() case. lazy_scan_noprune() still needs an output parameter for whether there are LP_DEAD items on the page, but the real decision-making now happens in the caller. Patch by me, reviewed by Peter Geoghegan and Melanie Plageman. Discussion: http://postgr.es/m/CA+TgmoaOzvN1TcHd9iej=PR3fY40En1USxzOnXSR2CxCLaRM0g@mail.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/.