68119480a7
During catcache searches, the most-recently searched entries are kept at the head of the list to speed up subsequent searches, keeping the "freshest" entries at its beginning. A rehash of the catcache was doing the opposite: fresh entries were moved to the tail of the newly-created buckets, causing a rehash to slow down a bit. When a rehash is done, this commit switches the code to use dlist_push_tail() instead of dlist_push_head(), so as fresh entries are kept at the head of the lists, not their tail. Author: ChangAo Chen <cca5507@qq.com> Reviewed-by: John Naylor <johncnaylorls@gmail.com> Reviewed-by: Michael Paquier <michael@paquier.xyz> Discussion: https://postgr.es/m/tencent_9EA10D8512B5FE29E7323F780A0749768708@qq.com
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/.