From: Bruce Momjian Date: Thu, 29 May 2025 02:43:13 +0000 (-0400) Subject: doc PG 18 relnotes: split apart log_connections item X-Git-Url: http://git.postgresql.org/gitweb/?a=commitdiff_plain;h=a1de1b0833b;p=postgresql.git doc PG 18 relnotes: split apart log_connections item Also add details to asynchronous I/O item. Reported-by: Melanie Plageman Discussion: https://postgr.es/m/CAAKRu_YsVvyantS0X0Y_-vp_97=yGaoYJMXXyCEkR7pumAH3Jg@mail.gmail.com --- diff --git a/doc/src/sgml/release-18.sgml b/doc/src/sgml/release-18.sgml index 83ff2225396..718f7b20bf1 100644 --- a/doc/src/sgml/release-18.sgml +++ b/doc/src/sgml/release-18.sgml @@ -569,6 +569,7 @@ Add an asynchronous I/O subsystem (Andres Freund, Thomas Munro, Nazir Bilal Yavu +This feature allows backends to queue multiple read requests, which allows for more efficient sequential scans, bitmap heap scans, and vacuums. This is enabled by server variable io_method, with server variables io_combine_limit and io_max_combine_limit added to control it. This also enables effective_io_concurrency and maintenance_io_concurrency values greater than zero for systems without fadvise() support. The new system view pg_aios shows the file handles being used for asynchronous I/O. @@ -682,15 +683,12 @@ This more accurately reflects modern hardware. Increase the logging granularity of server variable log_connections (Melanie Plageman) § -§ @@ -698,6 +696,18 @@ This server variable was previously only boolean; these options are still suppo + + + + +Add log_connections option to report the duration of connection stages (Melanie Plageman) +§ + + +