kern.ipc.nmbclusters

[Bill Moran]

"Steve Bertrand" <iaccounts at ibctech.ca> wrote:

> I have a machine that is rebooting with the following error:
> 
> "All mbuf clusters exhausted, please see tuning(7)."
> 
> Which through google and man tuning I was able to figure out that indeed,
> mbufs were exhausted. So I tried to set kern.ipc.nmbclusters=4096 (which
> should cover the load of the server), but found out after it is not a
> run-time tunable parameter.
> 
> I searched google, and gathered that I should put this setting in
> /boot/loader.conf.
> 
> This is contradictory of me usually putting kernel tweaks in
> /etc/sysctl.conf.
> 
> >From your experience, where is the best place to load this variable from,
> why is it a better location, and what will happen if I don't load it from
> the proper place?

You have to put it in loader.conf because that value is set _very_ early
in the boot process (before sysctl.conf is used) and can not be changed
later.

You can also put this value in your kernel config and recompile your kernel.

-- 
Bill Moran
Potential Technologies
http://www.potentialtech.com