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From: Heikki Linnakangas <heikki.linnakangas@iki.fi>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Fix assertion in pg_get_shmem_pagesize() in single-user mode
Date: Thu, 24 Sep 2026 11:50:12 +0000
Message-ID: <E1x9hxs-000000013bt-3wUq@gemulon.postgresql.org> (raw)

Fix assertion in pg_get_shmem_pagesize() in single-user mode

Remove assertion that was too strict, and tripped if you queried the
pg_shmem_allocations_numa or the pg_buffercache_os_pages view in
single-user mode.

The point of the assertion was that the function should only be called
after "the server has started", but it would be OK to call it from the
postmaster, too, as long as it's after startup, specifically after
huge_pages_status has been set.  We already have a direct assertion
for that.

Author: Ayush Tiwari <ayushtiwari.slg01@gmail.com>
Discussion: https://www.postgresql.org/message-id/CAJTYsWV-=w5_oFgCnfAixWGc=gMa2pkDinLyGLsb4sKcDaf2FA@mail.gmail...
Backpatch-through: 18

Branch
------
REL_18_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/297eb6a04f870f6b1f7c15cd710dc2f30a8776e3

Modified Files
--------------
src/backend/storage/ipc/shmem.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)



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  Subject: Re: pgsql: Fix assertion in pg_get_shmem_pagesize() in single-user mode
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