Re: increasing sysv semaphore limits

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

> Date: Wed, 15 Jul 2026 11:42:00 -0400
> From: Greg Troxel <gdt%lexort.com@localhost>
> 
> Back in 1993 I had a spiffy computer that had 12 MB of RAM, bought to
> run 386BSD 0.1 and then I ran NetBSD 0.8.  I say that to calibrate our
> sense of resource usgae.
> 
> On the theory that if a value was appropriate in 1993, 5x that value is
> totally fine in 2026.  If a machine has less than 60 MB of RAM, then
> lower might be warranted -- but on such a machine one would be building
> custom kernels and ripping out everything that isn't neceesary anyway.
> Therefore:
> 
>   I propose to change SEMMNI from 10 to 32.
>   I propose to change SEMMNS from 60 to 256.
> 
> The concept would be, as it is now, that individual ports or kernel
> configs could just set these to lower values, if that's appropriate.

Why not vary automatically with the amount of RAM at boot?