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Tuning a FreeBSD Mail Server PDF
Thursday, 03 April 2008
When tuning a FreeBSD Box for a Mail Server you must be aware that mail servers will need a very large number of network connections and small amount of data for a short period of time.

You can find how many network buffers you use:

netstat -m

Then you modify the following variables.

sysctl -w kern.ipc.nmbclusters=2048
sysctl -w kern.ipc.maxsockets=2048

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