From 09d7caad32d8d6987964a85ff71d12f18f63f43f Mon Sep 17 00:00:00 2001 From: Nathan Bossart Date: Mon, 3 Jun 2024 12:10:43 -0500 Subject: [PATCH] Fix documentation for System V semaphores. The formulas for SEMMNI and SEMMNS do not include the archiver process, which was converted to an auxiliary process in v14, and the WAL summarizer process, which was introduced in v17. This commit corrects these formulas and adds a missing reference to max_wal_senders nearby. Since this section of the documentation tends to be incorrect quite often, we should likely give up on documenting the exact formulas in favor of something less fragile, but that is left as a future exercise. Reported-by: Sami Imseih Reviewed-by: Sami Imseih Discussion: https://postgr.es/m/20240517164452.GA1914161%40nathanxps13 Backpatch-through: 12 --- doc/src/sgml/runtime.sgml | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml index ac4934608c3..2f660e288e0 100644 --- a/doc/src/sgml/runtime.sgml +++ b/doc/src/sgml/runtime.sgml @@ -812,7 +812,8 @@ psql: could not connect to server: No such file or directory When using System V semaphores, PostgreSQL uses one semaphore per allowed connection (), allowed autovacuum worker process - () and allowed background + (), allowed WAL sender process + (), and allowed background process (), in sets of 16. Each such set will also contain a 17th semaphore which contains a magic -- 2.39.5