Obtaining 75k (active) concurrent tcp sessions..

[Matt Freitag]

No,
kern.ipc.nmbclusters is read-only.

Setting this in /etc/sysctl.conf is futile, it'll never actually be set 
in the kernel this way, the change will just get a read-only error, just 
like you would once the machine is booted. As long as I can remember 
it's been like this.
<snip>
sysctl: oid 'kern.ipc.nmbclusters' is a read only tunable
sysctl: Tunable values are set in /boot/loader.conf
<snip>

-mpf

---
Only dimly aware of a certain unease in the air
---


Vulpes Velox wrote:

> On Fri, 13 Feb 2004 14:20:43 -0600
> Matt Freitag <mpf at inodes.us> wrote:
>
>  
>
>> For FreeBSD to support that many concurrent connections some kernel 
>> values must be tweaked. Namely, you'll need to set 
>> "kern.ipc.nmbclusters=81920" in loader.conf as it's a read-only oid.
>>   
>
>
> Is this something that has changed since 4x? AFAIK it should be
> settable in /etc/sysctl.conf... atleast it is on 4x, not sure about 5x
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