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Date:      Tue, 24 Jun 2014 09:14:31 -0700
From:      Brian <brian@brianwhalen.net>
To:        freebsd-questions@freebsd.org
Subject:   Re: kern.ipc.nmbclusters limit reached makes a server go down, please help
Message-ID:  <53A9A3E7.6090504@brianwhalen.net>
In-Reply-To: <1403617939.95369.YahooMailNeo@web162504.mail.bf1.yahoo.com>
References:  <1403617939.95369.YahooMailNeo@web162504.mail.bf1.yahoo.com>

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On 6/24/2014 6:52 AM, Stefan Stere wrote:
> Hi,
>
> I have a vmware virtual server running FreeBSD 10.0 STABLE
> The virtual server has 100mbps port.
>
> It is running a Tor router, consuming an average of 6-7 TB of monthly traffic. Its the only purpose of the server.
>
> Last night it went down, and vmware console log was saying:
> [zone: Mbuf_cluster] kern.ipc.nmbclusters limit reached
>
>
> I don't know what this means - the traffic of the server is unlimited and nothing is capped in any way. What can I do to fix this? I have read on freebsd wiki that I might need to add some lines to sysctl ? can you please confirm? Thank you in advance.
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Try netstat -m to see how many are being used.
There is some info here also 
https://wiki.freebsd.org/NetworkPerformanceTuning

Brian



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