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→numtcpsock: fix links, splitted into more paragraphs
number of TCP connections and, thus, the number of clients the server
application can handle in parallel.
Barrier of this parameter should be set equal to the limit.
If each Virtual Environment has it's own set of IP addresses (which is
the only way a OpenVZ system can be configured), there are no direct
limits on the total number of TCP sockets in the system. The number
of sockes sockets needs to be controlled because each socket needs certain
amount of memory for receive and transmit buffers (see descriptions
of [[<code>[[tcpsndbuf]]</code>]] and [[<code>[[tcprcvbuf]]</code>]]), and
the memory is a limited resource.
