a766125efd
When we were updating hint bits with just a share lock MarkBufferDirtyHint() had to use a non-standard order of operations, i.e. WAL log the buffer before marking the buffer dirty. This was required because the lock level used to set hints did not conflict with the lock level that was used to flush pages, which would have allowed flushing the page out before the WAL record. The non-standard order in turn required preventing the checkpoint from starting between writing the WAL record and flushing out the page. Now that setting hints and writing out buffers use share-exclusive, we can revert back to the normal order of operations. Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi> Discussion: https://postgr.es/m/5ubipyssiju5twkb7zgqwdr7q2vhpkpmuelxfpanetlk6ofnop@hvxb4g2amb2d |
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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/.