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From: Tom Lane <tgl@sss.pgh.pa.us>
To: "Greg Burd" <greg@burd.me>
cc: "PostgreSQL Hackers" <pgsql-hackers@lists.postgresql.org>,
        "Thomas Munro" <thomas.munro@gmail.com>
Subject: Re: Areas for Solaris support modernization
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Comments: In-reply-to "Greg Burd" <greg@burd.me>
	message dated "Mon, 02 Mar 2026 14:48:11 -0500"
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"Greg Burd" <greg@burd.me> writes:
> I've started a build/test on "icarus" with your patch applied.  I'll let=
 you know how it goes, hopefully that won't take as long now.

Cool.  Here's also a patch to switch the semaphore API.
I've tested both patches on OpenIndiana, but a confirmation
from icarus would be good.

			regards, tom lane


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diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index b4914faff1c..c1a3e5b779a 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1127,13 +1127,8 @@ projadd -c "PostgreSQL DB User" -K "project.max-shm=
-memory=3D(privileged,8GB,deny)
        </para>
 =

        <para>
-        Other recommended kernel setting changes for database servers whi=
ch will
-        have a large number of connections are:
-<programlisting>
-project.max-shm-ids=3D(priv,32768,deny)
-project.max-sem-ids=3D(priv,4096,deny)
-project.max-msg-ids=3D(priv,4096,deny)
-</programlisting>
+        To run a very large server, or multiple servers concurrently, you
+        might also need to raise <literal>project.max-shm-ids</literal>.
        </para>
 =

        <para>
diff --git a/meson.build b/meson.build
index ddf5172982f..40fbbbcd3fe 100644
--- a/meson.build
+++ b/meson.build
@@ -324,6 +324,7 @@ elif host_system =3D=3D 'openbsd'
 =

 elif host_system =3D=3D 'sunos'
   portname =3D 'solaris'
+  sema_kind =3D 'unnamed_posix'
   export_fmt =3D '-Wl,-M@0@'
   # We need these #defines to get POSIX-conforming versions
   # of many interfaces (sigwait, getpwuid_r, shmdt, ...).
diff --git a/src/template/solaris b/src/template/solaris
index a4d8d38a8f8..ea524fdb2bd 100644
--- a/src/template/solaris
+++ b/src/template/solaris
@@ -1,4 +1,9 @@
 # src/template/solaris
 =

+# Prefer unnamed POSIX semaphores if available, unless user overrides cho=
ice
+if test x"$PREFERRED_SEMAPHORES" =3D x"" ; then
+  PREFERRED_SEMAPHORES=3DUNNAMED_POSIX
+fi
+
 # Extra CFLAGS for code that will go into a shared library
 CFLAGS_SL=3D"-fPIC"

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