| From: | Jon Jensen <jon(at)endpoint(dot)com> |
|---|---|
| To: | Neil Conway <neilc(at)samurai(dot)com> |
| Cc: | PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: xBSD shmem doc deficiency |
| Date: | 2002-11-21 05:14:25 |
| Message-ID: | Pine.LNX.4.44.0211210511260.6072-100000@louche.swelter.net |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On 20 Nov 2002, Neil Conway wrote:
> However, the FreeBSD box I'm playing with isn't mine, so I'm not too
> keen to change sysctls (well, that and I don't have root :-) ). Would
> a kind BSD user confirm that:
>
> (a) the sysctls above *can* be used to change kernel shared
> memory settings, and the default value of the sysctl is
> the kernel option referred to in the docs.
>
> (b) do the above sysctls work on NetBSD and OpenBSD as well?
A quick look at OpenBSD 3.2 (man 3 sysctl) appears to show that all you
can do at runtime is enable/disable message queues, shared memory, and
semaphores, not adjust buffer counts or sizes. It seems the kernel must
still be recompiled with the desired new settings.
Jon
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