From owner-freebsd-questions  Fri Feb  9 10:36:39 2001
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Date: Fri, 09 Feb 2001 19:37:24 +0100
From: Christoph Sold <so@server.i-clue.de>
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To: Omer Faruk Sen <ofsenfreebsd@yahoo.com>
Cc: questions@FreeBSD.ORG
Subject: Re: kern.maxproc (system tunning)
References: <20010208113206.91352.qmail@web9307.mail.yahoo.com>
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Omer Faruk Sen schrieb:
> 
> I have a problem with my system.In fact I want to
> tweak my system to get a better performance.As far as
> I know freebsd meant to be slow first but tweaking it
> it can be a system of fortue :) And it is now but
> needs tweaking.
> Anyway my problem:
> How can I change kern.maxproc?

Change it using sysctl -w.

> When I try to raise
> that value I get result of
> ------------------
> su-2.04# sysctl  -w kern.maxproc=1000
> sysctl: oid 'kern.maxproc' is read only
> ----------------

Oooops.
Well, have a look at /usr/src/sys/i386/conf/LINT. It shows all the
"read-only" kernel options. Tweak as you think fit. Build a kernel with
new values, install, reboot.

To learn more about building your own kernel, have a look at the
handbook.

> I think there are more values to tweak.And here they
> are (at least ones that I could able to find to have a
> better perfomance)
> 
> kern.maxvnodes=10000
> kern.maxfiles=2500
> kern.maxproc=1000
> kern.maxfilesperproc=2500
> kern.maxprocperuid=1500
> 
> I have used arbitrary values for them.Do I have to
> make a balance among them?

As long as you don't understand what these values manipulate, better
leave them alone. I personally just adjust the maxusers option to
something between 64 and 512, depending on how mauch processes I expect
to run simulatneously.

HTH
-Christoph Sold


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