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Michael Paquier 4b203d499c pg_buffercache: Add pg_buffercache_os_pages ... ba2a3c2302 has added a way to check if a buffer is spread across multiple pages with some NUMA information, via a new view pg_buffercache_numa that depends on pg_buffercache_numa_pages(), a SQL function. These can only be queried when support for libnuma exists, generating an error if not. However, it can be useful to know how shared buffers and OS pages map when NUMA is not supported or not available. This commit expands the capabilities around pg_buffercache_numa: - pg_buffercache_numa_pages() is refactored as an internal function, able to optionally process NUMA. Its SQL definition prior to this commit is still around to ensure backward-compatibility with v1.6. - A SQL function called pg_buffercache_os_pages() is added, able to work with or without NUMA. - The view pg_buffercache_numa is redefined to use pg_buffercache_os_pages(). - A new view is added, called pg_buffercache_os_pages. This ignores NUMA for its result processing, for a better efficiency. The implementation is done so as there is no code duplication between the NUMA and non-NUMA views/functions, relying on one internal function that does the job for all of them. The module is bumped to v1.7. Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com> Reviewed-by: Mircea Cadariu <cadariu.mircea@gmail.com> Reviewed-by: Michael Paquier <michael@paquier.xyz> Discussion: https://postgr.es/m/Z/fFA2heH6lpSLlt@ip-10-97-1-34.eu-west-3.compute.internal		1 month ago
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pg_buffercache.out	pg_buffercache: Add pg_buffercache_os_pages	1 month ago
pg_buffercache_numa.out	Add pg_buffercache_numa view with NUMA node info	9 months ago
pg_buffercache_numa_1.out	Add pg_buffercache_numa view with NUMA node info	9 months ago