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Re: Question about nmbclusters

In article <>,
Konrad Neuwirth  <> wrote:
>Hello everyone, 
>we are currently facing severe problems with nmbclusters on a NetBSD 6.0
>generic system (amd64). We're running short of nmbclusters, and I do not
>understand how I can increase them. 
>sysctl kern.mbuf.nmbclusters
>kern.mbuf.nmbclusters = 16384
>I see that this number is both derived at boot time (writing another
>value into the kernel has no effect), but I also cannot turn that knob.
>The only value that doesn't lead to an 'invalid argument' error is
>16384. I have no idea what a better value is, but we've outages of up to
>ten minutes that take down all network interfaces on that system (and
>we're at six networking interfaces, one with three vlans -- and they're
>mostly well-used). 
>So: What can I do to get that value up, to make the system more stable? 
>Thank you,

How much memory does the machine have?

$sysctl -w kern.mbuf.nmbclusters=540000
kern.mbuf.nmbclusters: 524213 -> 540000


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