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Andres Freund 2c78940527 bufmgr: Remove freelist, always use clock-sweep ... This set of changes removes the list of available buffers and instead simply uses the clock-sweep algorithm to find and return an available buffer. This also removes the have_free_buffer() function and simply caps the pg_autoprewarm process to at most NBuffers. While on the surface this appears to be removing an optimization it is in fact eliminating code that induces overhead in the form of synchronization that is problematic for multi-core systems. The main reason for removing the freelist, however, is not the moderate improvement in scalability, but that having the freelist would require dedicated complexity in several upcoming patches. As we have not been able to find a case benefiting from the freelist... Author: Greg Burd <greg@burd.me> Reviewed-by: Tomas Vondra <tomas@vondra.me> Reviewed-by: Andres Freund <andres@anarazel.de> Discussion: https://postgr.es/m/70C6A5B5-2A20-4D0B-BC73-EB09DD62D61C@getmailspring.com		6 days ago
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expected	Fix assertion failure in pg_prewarm() on objects without storage.	4 months ago
sql	Fix assertion failure in pg_prewarm() on objects without storage.	4 months ago
t	Update copyright for 2025	8 months ago
.gitignore	Add a regression test for contrib/pg_prewarm.	3 years ago
Makefile	Fix assertion failure in pg_prewarm() on objects without storage.	4 months ago
autoprewarm.c	bufmgr: Remove freelist, always use clock-sweep	6 days ago
meson.build	Fix assertion failure in pg_prewarm() on objects without storage.	4 months ago
pg_prewarm--1.0--1.1.sql	…
pg_prewarm--1.1--1.2.sql	pg_prewarm: Add automatic prewarm feature.	8 years ago
pg_prewarm--1.1.sql	…
pg_prewarm.c	Fix assertion failure in pg_prewarm() on objects without storage.	4 months ago
pg_prewarm.control	pg_prewarm: Add automatic prewarm feature.	8 years ago