4f7ecca84d
Move VM corruption detection and repair into heap page pruning. This allows VM repair during on-access pruning, not only during vacuum. Also, expand corruption detection to cover pages marked all-visible that contain dead tuples and tuples inserted or deleted by in-progress transactions, rather than only all-visible pages with LP_DEAD items. Pinning the correct VM page before on-access pruning is cheap when compared to the cost of actually pruning. The vmbuffer is saved in the scan descriptor, so a query should only need to pin each VM page once, and a single VM page covers a large number of heap pages. Author: Melanie Plageman <melanieplageman@gmail.com> Reviewed-by: Andres Freund <andres@anarazel.de> Reviewed-by: Chao Li <li.evan.chao@gmail.com> Reviewed-by: Kirill Reshke <reshkekirill@gmail.com> Discussion: https://postgr.es/m/bqc4kh5midfn44gnjiqez3bjqv4zogydguvdn446riw45jcf3y%404ez66il7ebvk |
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| configure | ||
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| COPYRIGHT | ||
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| README.md | ||
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/.